fig1 shows a marker 100 in accordance with one embodiment of one aspect of the present invention . this marker 100 is adapted to be removably attached to an image , for example , a diagnostic image captured on a radiographic film or printed on paper , for any of various purposes , for example , but not limited to , identification , clarification , emphasis of one or more aspects of the image , and / or combinations thereof . the marker 100 includes a base ( or substrate ) 102 that comprises a clear , thin plastic sheet of an appropriate size and shape . the marker 100 is inscribed with a target sight 101 to aid , for example , in precisely identifying a feature of interest and / or a center of a site of interest within the image . the target site comprises a series of concentric circles 106 , 108 and cross hairs ( e . g ., formed of line segments 110 , 112 , 114 and 116 ). it is often desirable to make the line thickness of the target sight 101 as thin as possible so as not to obscure any features of the portion of the image underlying the marker . the embodiment of the marker illustrated in fig1 has rounded ( i . e ., radiused ) corners to help keep the marker from being struck by and / or getting caught on objects , the occurrence of which could cause the marker to become detached from an image . fig2 shows a side elevational view of the marker 100 and a diagnostic image 120 ( for example , a radiographic image ). the base 102 of the marker 100 has a first portion 130 with an underside ( or backing ) 132 that is coated with an adhesive layer 134 that removably attaches or releasably secures the marker 100 to the image 120 and enables the marker 100 to stay in place on the image 120 under ordinary handling conditions . however , the marker 100 may be removed entirely without damaging or leaving residual glue on the diagnostic image 120 . in some embodiments , the marker 100 has a length 119 of about 6 cm , the circle 106 and the circle 108 have diameters of 4 centimeters ( cm ) and 2 cm , respectively , and each of the line segments has a length of 1 . 5 cm , thereby leaving an area 118 , without indicia , near the center of the circle 108 . it should be understood however , that the marker can be made any size . for example , images used in dental applications are often relatively small compared to that of a mammogram . thus , it may be desirable to employ a marker that has reduced size compared to the marker of fig1 - 2 . on the other hand , images of some large body parts may be relatively large compared to the size of a mammogram . thus , it may be desirable to employ a marker that has increased size compared to the marker of fig1 - 2 . in some embodiments , a size increase or decrease is carried out using a scaling factor , e . g ., 4 : 1 or 1 : 4 , respectively , in order to preserve the relative proportioning of the features of a marker , although this is not required . notwithstanding the above , there is no requirement that the markers have a particular size compared to the size of the images to be marked . notes and communications pertaining to an observed oddity or orders for further procedures may be recorded in pen or pencil on a note portion , which may be , for example , a plain paper tab 136 is attached to the base 102 over the area of the adhesive 134 . the base 102 has a second portion 138 with an underside 139 that is free ( or substantially free ) of adhesive and therefore may be lifted upward ( e . g ., as represented by dotted lines 138 ′) to further study the portion of the diagnostic image 120 that is overlayed by the second portion 138 without any need for shifting or relocating the marker 100 . as stated above , the marker 100 may be left in place for any length of time or removed completely leaving no residual adhesive and without damage to the film or emulsion . the adhesive material ( s ) may be for example a pressure sensitive adhesive . one method for forming the adhesive layer is to coat the surface 132 with an adhesive material in liquid form . another method is to apply an adhesive material in a dry form . dry adhesive suitable for use as a layer or backing may be obtained in large sheets and then cut to size . it may be desirable to select the adhesive material ( s ) based at least in part on the type of image with which a marker is to be used . markers may for example be provided in the form of a stack ( for example as described with respect to fig2 ), on a sheet , or in an individually separate form . markers that are provided in an individually separate form may be provided with a releasable backing attached to the adhesive layer ( for example as shown by dotted lines 335 in fig5 ). such a backing helps keep the markers from sticking to one another prior to use and would need to be removed prior to releasably attaching the marker to an image . such a backing may be formed of a paper , a coated paper or a plastic material that permits the backing to be manually peeled away from the adhesive in order to expose the adhesive prior to attaching the marker to an image . markers provided in a stack or on a sheet would be removed ( e . g ., “ peeled ”) off the stack or sheet prior to use . in some embodiments , a plurality of markers are disposed on an elongated releasable backing rolled into a cylindrical form . although the marker 100 is disclosed as having an adhesive layer , this is not meant to imply that the adhesive must have a particular configuration or be uniformly disposed on the surface 132 . for example , in some embodiments , adhesive may be disposed on only a portion of the surface 132 . in some embodiments , the adhesive disposed on the surface 132 may have a grid or grid - like form . in some other embodiments , the adhesive may be in the form of an array of circles . in some other embodiments , the adhesive may be disposed only along one or more edges of the surface 132 or one or more portions of such edges . in some other embodiments , the adhesive disposed on the surface 132 may have an irregular configuration and / or any combination of the configurations . moreover , it should be understood that the lines on the marker can be any color . a marker of this type may be used for example , in association with images captured on light transmitting substrate ( e . g ., film ) or printed on paper . the marker can be used to help point out areas of concern on old films as well as expediting the identification of these specific areas of concern on newer films , and thereby facilitating a succinct and specific comparison report . the marker is particularly attractive in the field of mammography , as further described hereinafter . however , markers of this type may be used on any type of image , including but not limited to , for example , radiological images , where there is a need to precisely point out a feature of interest ( e . g ., an abnormality ). the image may be on a translucent substrate ( e . g ., x - ray film ), paper , or any other medium suitable for the particular application . the marker is also particularly attractive for use in association with computerized tomagraphy ( commonly referred to as ct ), magnetic resonance imaging ( commonly referred to as mri ), ultrasound and nuclear medicine ( gamma camera depictions ), which often involve a group or series of images to be evaluated . for example , a marker of this type may be used as an aid in defining the specific images which show a lesion on a series of images of a large number such as a complete set of ct or mri slices . a marker could also be made indicating views referred to in the report on a series of ultrasound images or nuclear medicine gamma camera depictions . note that ct is often used to produce images of axial sections of a body . mri is often used to image axial , coronial , or saggital sections . it should be understood that although the marker 100 is described above as being able to be left in place for any length of time or removed completely leaving no residual adhesive and without damage to the film or emulsion , the present invention is not limited to such . for example , in some embodiments , a marker may leave a small albeit insubstantial amount of residual adhesive and / or may result in a small albeit insubstantial degradation of the diagnostic image . in addition , although the marker 100 includes a base ( or substrate ) 102 that comprises a clear , thin plastic sheet of an appropriate size and shape , the base is not limited to such . in addition , it should be understood that the base may comprise a single layer or a plurality of layers attached to one another . in some embodiments , it may be desirable to provide the second portion of the base with color characteristics ( e . g ., blue , red , yellow ) in order to further attract attention to the portion of the diagnostic image therebeneath . it should also be understood that the marker of fig1 includes many features , not all of which will be needed or employed in every embodiment of the present invention . thus , some embodiments will comprise less than all of the features of the marker of fig1 . moreover , although the marker of fig1 provides various advantages , it should be understood that such advantages may not be needed and / or may not be provided in every embodiment . in addition , as stated above , it should be understood that the marker features disclosed herein can be used in any combination . fig3 shows a side elevational view of a marker 200 according to a second embodiment . the marker 200 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 2 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that the adhesive layer 234 of the marker 200 coats the underlying surfaces of both portions 230 , 238 of the base 202 . thus , the adhesive layer 234 is preferably comprised of an adhesive that is substantially clear , and more preferably , transparent . it should be understood that some other embodiments may employ adhesive on the underside of the second portion but not on the underside of the first portion . fig4 - 5 show views of a marker 300 according to a third embodiment . the marker 300 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 3 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that ( i ) the base 302 and paper tab 336 of the marker 300 have square corners and are somewhat larger than the base 102 and paper tab 136 , respectively , and ( ii ) the base 302 includes added indicia ( compared to the base 102 ) in the form of a gauge portion 350 . the larger base allows a border around the target sight , without the need to reduce the size of the target sight . the gauge portion 350 includes a graduated portion 352 , numeric indicia 354 and dimensional indicia 356 . this type of gauge portion may be used for example , to determine the size of features appearing in a diagnostic image ( e . g ., diagnostic image 120 ( fig2 )). gauge portions ( or any portion thereof ) may also be employed on the other markers disclosed herein . the marker may be provided with a releasable backing 335 attached to the adhesive layer 334 . such a backing would need to be removed prior to releasably attaching the marker to an image . fig6 - 7 show views of a marker 400 according to a fourth embodiment . the marker 400 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 4 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that the marker 400 does not include a plain paper tab for notes . the first base portion 430 is made translucent or opaque and adapted to receive written notes . fig8 - 9 show views of a marker 500 according to a fifth embodiment . the marker 500 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 5 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that the marker 500 has a target sight portion that includes one circle 508 , rather than two , and does not include any cross hairs . fig1 - 11 show views of a marker 600 according to a sixth embodiment . the marker 600 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 6 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that the marker 600 has a target sight portion without concentric circles . fig1 shows a view of a marker 700 according to a seventh embodiment . the marker 700 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 7 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that ( i ) the paper tab 736 of the marker 700 is somewhat larger than the paper tab 136 and ( ii ) the marker 700 includes indicia 760 to personalize the marker 700 . in this embodiment , the personalized indicia indicates the name of a doctor and / or the name of a hospital , clinic , or school . fig1 shows a marker 900 according to another embodiment . the marker 900 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 9 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that ( i ) the marker 900 has logo type indicia 964 and ( ii ) a target sight portion that includes crossing line segments 966 , 968 . fig1 shows a marker 1000 according to a another embodiment . the marker 1000 is similar to the marker 900 ( except where otherwise noted , like reference numerals preceded by the numeral “ 10 ” instead of the numeral “ 9 ” are used to indicate like elements ). fig1 shows a marker 1100 according to another embodiment . the marker 1100 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 11 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that the marker 1100 includes indicia in the form of a gauge portion 1150 . the gauge portion 1150 includes a graduated portion formed by numeric indicia 1154 . this type of gauge portion may be used for example , to determine the size of features appearing in a diagnostic image ( e . g ., diagnostic image 120 ( fig2 )). similar or other type gauge portions ( or any portion thereof ) may also be employed on the other markers disclosed herein . fig1 shows a marker 1200 according to another embodiment . the marker 1200 is similar to the marker 1100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 12 ” instead of the numeral “ 11 ” are used to indicate like elements ). fig1 shows a view of a marker 1300 according to another embodiment . the marker 1300 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 13 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that ( i ) the base 1302 and the paper tab 1336 of the marker 1300 are somewhat larger than the base 102 and the paper tab 136 , respectively , and ( ii ) the marker 1300 includes field of use indicia 1370 to indicate a field in which the marker 1300 may be used . markers may of course be used in any field employing diagnostic images including but not limited to , for example , mammography , podiatry and dentistry . in this embodiment , the field of use indicia 1174 comprises the phrase “ foot notes ” which may for example be appropriate for use in association with podiatry . fig1 shows a marker 1400 according to another embodiment . the marker 1400 is similar to the marker 700 ( except where otherwise noted , like reference numerals preceded by the numeral “ 14 ” instead of the numeral “ 7 ” are used to indicate like elements ) except that ( i ) the second base portion 1434 has an arrow - like shape , and ( ii ) the marker 1400 has a target sight portion that includes an arrow 1474 rather than concentric circles and cross hairs . fig1 shows a view of a marker 1500 according to another embodiment . the marker 1500 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 8 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that ( i ) the base 1502 and the paper tab 1536 of the marker 1500 are somewhat larger than the base 102 and the paper tab 136 , respectively , and ( ii ) the marker 1500 includes an anatomical indicia 1576 , which in this embodiment includes a set of anatomical diagrams of two breasts . the diagrams can be marked 1578 to indicate the portion of the anatomical region that is depicted by the diagnostic image or within the target sight of the marker . this type of marker may be used in any diagnostic field , including but not limited to , for example , in association with diagnostic images that are generated using ultrasound technology . fig2 shows a marker 1600 according to another embodiment . the marker 1600 is similar to the marker 1500 ( except where otherwise noted , like reference numerals preceded by the numeral “ 16 ” instead of the numeral “ 15 ” are used to indicate like elements ) except that ( i ) the second base portion 1634 has an arrow - like shape , and ( ii ) the marker 1600 has a target sight portion that includes an arrow 1680 rather than concentric circles and cross hairs . fig2 shows a marker 1700 according to another embodiment . the marker 1700 is similar to some of the markers described above , however , the marker 1700 has a target sight portion that includes a triangle 1782 . fig2 shows a view of a marker 1800 according to another embodiment . the marker 1800 is similar to the marker 1500 ( except where otherwise noted , like reference numerals preceded by the numerals “ 18 ” instead of the numerals “ 15 ” are used to indicate like elements ) except that the marker 1800 includes anatomical indicia 1876 , which in this embodiment includes an abdominal diagram . the diagram can be marked 1878 to indicate the portion of the abdominal region that is depicted by the diagnostic image or within the target sight of the marker . this type of marker may be used in any diagnostic field , including but not limited to , for example , in association with diagnostic images that are generated using ultrasound technology . fig2 shows a plurality of markers 1900 mounted within a holder 2000 having a form similar to that of a note pad . this holder 2000 comprises a strip formed of cardboard , plastic , or material ( s ) similar thereto . the strip is folded to define a front portion 2002 , a back portion 2004 , and a volume 2005 therebetween for mounting the markers 1900 . the front and back portions 2002 , 2004 may be similar in size and shape and may overlay one another as shown , although this is not required . the shape of the front and back portions may be similar to that of the markers 1900 mounted in the holder . the holder 2000 may further comprise a marker 2006 ( or a simulated marker ) and a double sided adhesive strip 2008 ( fig2 ). the marker 2006 ( or simulated marker ) may be affixed to the front portion 2002 of the holder 2000 and may have an appearance and orientation that is substantially identical to that of the plurality of markers 1900 mounted ( or to be mounted ) within the holder 2000 . the double sided adhesive strip 2008 may be affixed to the rear portion 2004 of the holder to facilitate attachment of the holder 2000 to another structure . this holder 2000 may for example hold approximately 20 to 50 removable markers . the markers 1900 are stacked one on top of the other , with the adhesive backing of each marker in the stack ( except for the marker at the rear of the stack ) attached to the front surface of an adjacent marker in the stack . the markers 1900 are each oriented with their adhesive backed portion adjacent to the folded portion of the holder 2000 . some embodiments may replace the adhesive strip with another form of adhesive suitable to attach the holder to a desired structure . some other embodiments may eliminate the adhesive on the rear portion 2004 altogether . fig2 a - 25c show representations of a diagnostic image 2100 with and without a removable marker . more specifically , fig2 a shows a representation of a diagnostic image 2100 without a removable marker . the diagnostic image 2100 shows an image of a breast and has an area of concern designated by an “ x ”. fig2 b shows a representation of a removable marker 2200 attached to the diagnostic image 2100 . the removable marker 2200 has a target sight 2201 identifying the area of concern . fig2 c shows the removable marker 2200 attached to the diagnostic image 2100 but with one portion lifted to further reveal the area of concern beneath the target sight 2201 of the removable marker 2200 . in some embodiments , the marker has a target sight that includes some type of graduation system , such as for example , but not limited to , as shown in any one or more of fig1 , 6 - 8 , 10 , 12 - 17 , 19 , 22 , 29 - 31 , and 34 - 35 . the marker may further include a text region that is to be displayed on the image and provides information regarding the marked region . in some embodiments , the system may actually require that the user supply information to be displayed in the text region and / or may cause the marker ( or a portion thereof ) to blink until such information is supplied . fig2 shows schematic block diagram of a system 2300 for adding and / or deleting markers from digital diagnostic images in accordance with one embodiment of a third aspect of the present invention . this system is adapted to adding / removing marker ( s ) to / from a digital image that is recorded or displayed on a television screen , transmitted electronically , or portrayed on a computer monitor . the system 2300 includes a diagnostic image storage device or database 2302 , a data processor 2304 , one or more output devices , e . g ., a display 2306 and a printer 2308 , one or more input devices , e . g ., a mouse 2310 and a keyboard 2312 , and a communication link 2314 . the data processor 2304 may comprise for example , a digital computer having conventional elements including but not limited to a power supply , a central processor unit ( cpu ), volatile and non - volatile storage elements , input / output subsystems , and operating system and application programs . the communication link 2314 may be any kind of communication link . in operation , the storage device 2302 provides information indicative of a diagnostic image to the data processor 2304 . the data processor 2304 in turn supplies an image to the display 2306 and / or printer 2308 . the image supplied by the data processor may be , for example , the diagnostic image received from the storage device 2302 or the diagnostic image with one or more markers superimposed thereon . a user may employ one or more of the input devices , e . g ., the mouse 2310 and / or the keyboard 2312 , to provide information indicative of a location in the diagnostic image at which a marker is desired and / or information indicative of a marker to be removed from the image . the data processor 2304 responds to the information adding or removing a marker from the image that is supplied to the output device , e . g ., the display 2306 . fig2 a - 27c show an example of adding a marker to a diagnostic image displayed on a display device , e . g ., the display 2306 . more specifically , fig2 a shows a representation of a diagnostic image 2400 without a marker . the diagnostic image 2400 includes an image of a breast 2402 and has an area of concern designated by an “ x ”. fig2 b shows a representation of a target sight 2404 that is generated , for example , by the data processor 2304 , and positioned so as to overlay the area of concern , for example , by the data processor 2304 . in this embodiment , the positioning of the target sight 2404 within the image 2400 is carried out by the data processor 2304 in response to information ( e . g ., commands ) from the user employing one or more of the input devices . fig2 c shows a representation of a marker 2500 that is generated , for example , by the data processor 2304 , and positioned in accordance with the location of the target sight 2404 ( fig2 b ). the marker 2500 may for example , resemble one or more of the markers described hereinabove , although this is not required for the present invention . in this embodiment , the marker has a target sight 2501 that overlays the area of concern . the marker 2500 may further include a note portion 2536 for displaying other information ( e . g ., notes ) although this is not required . fig2 d - 27e show an example of removing the marker 2500 from the image . more particularly , fig2 d shows a pointer 2600 added to the image in response to information from the user . the pointer 2600 identifies the marker 2500 that is to be removed . in this embodiment , the positioning of the pointer 2600 within the image 2400 is carried out by the data processor 2304 ( fig2 ) in response to information from the user employing one or more of the input devices . it should be understood however that other methods may also be used for identifying a marker to be removed from the image 2400 . fig2 e shows the image 2400 with the marker 2500 removed . it should be understood that in some embodiments , the positioning of the marker may be carried out automatically in response to information from an image processor adapted to identify features of concern in the diagnostic image . fig2 is a flowchart 3000 showing steps carried out in one embodiment of the data processor , in association with adding and / or removing markers from a digital diagnostic image . at a step 3002 , the data processor 2304 ( fig2 ) receives information representing a diagnostic image . at a step 3004 , the data processor supplies an image to a display device , which displays the image . at a step 3006 , the data processor receives information indicating the location of a marker to be added to the image and / or information indicating a marker to be removed from the image . at a step 3008 , the data processor adds the marker at the indicated location , and / or removes the indicated marker from the image , as appropriate . at a step 3010 , the data processor determines whether there are any more markers to be added or removed to / from the image . if there are no more markers to be added or removed , then execution proceeds to a step 3012 , where the diagnostic image and marker information may be stored . otherwise , execution reverts to the step 3006 , to continue adding and / or removing markers to / from the image . it should be understood that the data processor 2304 may be any kind of data processor . for example , the data processor may be programmable or non programmable , general purpose or special purpose , dedicated or non dedicated , distributed or non distributed , shared or not shared , and / or any combination thereof a data processor may comprise hardware , software , firmware , hardwired circuits and / or any combination thereof the data processor may or may not execute one or more computer programs that have one or more subroutines , or modules , each of which may include a plurality of instructions , and may or may not perform tasks in addition to those described herein . if the computer program includes more than one module , the modules may be parts of one computer program , or may be parts of separate computer programs . it should be recognized , that as used herein , the term module is not limited to a subroutine but rather may for example comprise hardware , software , firmware , hardwired circuits and / or any combination thereof . in some embodiments , the data processor comprises at least one processing unit connected to a memory system via an interconnection mechanism ( e . g ., a data bus ). a memory system may include a computer - readable and writeable recording medium . the medium may or may not be non - volatile . examples of non - volatile medium include a magnetic disk , flash memory , and magnetic tape . a disk may be removable , e . g ., known as a floppy disk , or permanent , e . g ., known as a hard drive . examples of volatile memory include but is not limited to random access memory , e . g ., dynamic random access memory ( dram ) or static random access memory ( sram ), which may or may not be of a type that uses one or more integrated circuits to store information . a variety of mechanisms are known for managing information movement between a disk and an integrated circuit memory element . if the data processor executes one or more computer programs , the one or more computer programs may be implemented as a computer program product tangibly embodied in a machine - readable storage medium or device for execution by a computer . further , if the data processor is a computer , such computer is not limited to a particular computer platform , particular processor , or programming language . computer programming languages may include but are not limited to procedural programming languages , object oriented programming languages , and combinations thereof . a general purpose computer system may or may not execute a program called an operating system , which may or may not control the execution of other computer programs and provides scheduling , debugging , input / output control , accounting , compilation , storage assignment , data management , communication control , and / or related services . a general purpose computer system may for example be programmable using a computer language such as c , c ++, java or other language , such as a scripting language or even assembly language . the computer system may also be specially programmed , special purpose hardware , or an application specific integrated circuit ( asic ). as stated above , the communication link may be any kind of communication link including but not limited to , for example , wired ( e . g ., conductors , fiber optic cables ) or wireless ( e . g ., microwave links , satellite links , infrared links ), and combinations thereof , each of which may be public or private , dedicated and / or shared ( e . g ., a network ). the communication link may employ for example circuit switching or packet switching or combinations thereof . other examples of communication links include dedicated point - to - point systems , wired networks , and cellular telephone systems . the communication link may employ any protocol or combination of protocols including but not limited to the internet protocol . although mouse and keyboard input devices are shown , other types of input devices including but not limited to , tactile input devices such as a touch screens , may be employed . examples of output devices include , but are not limited to , cathode ray tube ( crt ) devices , liquid crystal displays ( lcd ), plasma displays and other video output devices , printers , communication devices for example modems , storage devices such as a disk or tape and audio output , and devices that produce output on light transmitting films or similar substrates . although a display and printer output devices are shown , other types of output devices may be employed . example input devices include but are not limited to keyboards , keypads , track ball , mouse , pen and tablet , light pen , touch screens , and data input devices such as audio and video capture devices . it should thus be understood that the present invention is not limited to the input or output devices described herein . fig2 shows a marker 3100 according to another embodiment . the marker 3100 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 31 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that the marker 3100 has a sticker 3190 with printed date indicia 3191 . the date indicia 3191 indicates the date of the image and / or the date of the analysis of the image . stickers such as the sticker 3190 are found in many clinics and laboratories . it should be understood however , that although the date indicia in this embodiment is provided in the form of a printed sticker , date indicia may added to a marker in any way . fig3 shows a marker 3200 according to another embodiment . the marker 3200 is similar to the marker 3100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 32 ” instead of the numeral “ 31 ” are used to indicate like elements ) except that the marker 3200 has a base 3202 that is somewhat larger than the base 3102 to allow a border around the target sight 3201 . fig3 shows a marker 3300 according to another embodiment . the marker 3300 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 33 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that ( i ) the base 3302 is somewhat larger than the base 102 and ( ii ) the marker 3300 has a target sight that comprises a grid . the grid has a plurality of rows ( e . g ., labeled “ a ” through “ d ”) and columns ( e . g ., labeled “ 1 ” through “ 4 ”). in some embodiments , the base may be squared off for example as indicated by dotted line 3394 . note that the target sight , as with many of the other target sights described herein can also serve as a gauge if dimensional indicia are provided or implied . fig3 shows a marker 3400 according to another embodiment . the marker 3400 is similar to the marker 100 ( except where otherwise noted , like reference numerals preceded by the numeral “ 33 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that ( i ) there is no paper note portion and ( ii ) the base 3402 has substantially the same dimensions as the target sight . fig3 shows a marker 3500 according to another embodiment . the marker 3500 is similar to the marker 300 ( except where otherwise noted , like reference numerals preceded by the numeral “ 33 ” instead of the numeral “ 1 ” are used to indicate like elements ) except that ( i ) there is no paper note portion and ( ii ) the gauge portion 350 also serves as the target sight for identifying a feature of interest . fig3 - 55 show markers according to further embodiments . these markers are similar to the marker 3400 in that there is no paper note portion . in addition , it can be seen that the base of each marker is shaped to be slightly larger than the target sight of the marker , although even larger bases may be employed if desired . each of these markers has a base and a target sight . the base of each marker is transparent ( or at least substantially transparent ). adhesive is disposed on the underlying surface of the base ( at least a portion thereof ). thus , the adhesive layer 234 is preferably comprised of an adhesive that is substantially clear , and more preferably , transparent ( or at least substantially transparent ). the markers of fig3 - 55 may be used , for example , to enhance images that are to be reproduced ( e . g ., copied ) for publication and / or transmitted to another location . these markers may be particularly useful in the publication industry where it is desirable to have the ability to mark neatly mark an image . as can be seen , the markers can be any size and / or design . fig3 and 35 show markers on which concentric circles are inscribed or printed on the substrate for use in marking an area of interest . fig3 - 38 and 50 - 51 show a series of markers having a single circle inscribed or printed on the substrate . the circles on the markers may have varying sizes . for example , the markers shown in fig3 - 38 may have circles having diameters of 4 cm , 3 cm and 2 cm respectively while the markers in fig5 - 51 may be 1 . 0 cm and 0 . 5 cm respectively . fig3 - 42 show markers having solid lined arrows inscribed or printed on the substrate . the arrows may have varying lengths , as shown in fig3 - 42 , and may be , for example , 3 cm , 2 cm , 1 cm and 0 . 5 cm respectively . fig4 shows a marker with an image of a hand with a pointing finger inscribed or printed on the substrate . fig4 - 46 show single lined arrowheads that may be inscribed or printed on the substrate . the arrowheads may have lengths of 1 cm to 3 cm or more . fig4 - 49 show arrowheads outlined with double lines inscribed or printed on the substrate . the arrowheads may have lengths of 1 cm to 3 cm or more . fig5 - 54 show arrows outlined by dotted lines inscribed or printed on the substrate , while fig5 shows an arrow outlined by a broken line inscribed or printed on the substrate . the arrows may have lengths of 1 cm to 3 cm or more . fig5 shows one embodiment for fabricating removable markers on a sheet . the markers provided on the sheet would be removed ( e . g ., “ peeled ”) off the sheet prior to use . the sheet has three layers : a marker base layer 4000 , an adhesive layer 4002 , and a backing . the marker is printed onto the base layer and the outline of the marker bases is punched into the marker base layer 4000 and the adhesive layer 4002 to enable the marker to be lifted or peeled off of the sheet . the backing comprises any suitable material that prevents the debris from sticking to the adhesive layer , yet allows the marker to be peeled off with the adhesive . fig5 , 58 shows side perspective and cross sectional views , respectively , of the removable markers mounted on the sheet of fig5 . in view of the above , it should be understood that there is no requirement that the marker have a target sight . nonetheless , it is desirable to have a target sight that focuses a readers attention on a region . such target sights include but are not limited to , indicia that ( i ) substantially surround a region , ( ii ) extend in directions that converge at or toward a region , and / or ( iii ) point in directions that converge at or toward a region . as used herein , indicia that substantially surround a region include but are not limited to , indicia that are ( i ) on opposite sides of a region , ( ii ) extend in directions that converge at or toward a region , and / or ( iii ) point in directions that converge at or toward a region . as used herein , except where stated otherwise , the term substantially surrounds means at least substantially surrounds so as not to preclude actually surrounding a region . as stated above , it should be understood that although many of the images described herein are diagnostic images , the various aspects of the present invention may be used in association with any type of image , unless explicitly stated otherwise . for example markers may be used in association with any type of image that conveys information and is to be analyzed , including but not limited to architectural or mechanical drawings , electrical schematics , photographs , and graphic art . as to diagnostic images , it should be understood that although diagnostic images are widely employed within the medical fields , diagnostic images are also used is a wide variety of fields outside the medical field . it should be understood that medical diagnostic images may be radiographic images and / or recorded anatomic images generated by other imaging modalities displayed on photographic film and / or other recording modalities . the markers described herein may be used with images generated by any diagnostic imaging modality . it should be further understood that images may come in many forms and may for example be captured on a light transmitting substrate ( e . g ., x - ray film ), plastic , paper or any other suitable medium . unless explicitly stated otherwise , the various aspects of the present invention are not restricted to use in association with light transmitting substrates ( e . g ., x - ray films ). in addition , as stated above , it should be understood that the marker features disclosed herein can be used in any combination . note that , except where otherwise stated , terms such as , for example , “ comprises ”, “ has ”, “ includes ”, and all forms thereof , are considered open - ended , so as not to preclude additional elements and / or features . also note that , except where otherwise stated , terms such as , for example , “ in response to ” and “ based on ” mean “ in response at least to ” and “ based at least on ”, respectively , so as not to preclude being responsive to and / or based on , more than one thing . while there have been shown and / or described various embodiments , it will be understood by those skilled in the art that the present invention is not limited to such embodiments , which have been presented by way of example only , and that various changes and modifications may be made without departing from the spirit and scope of the invention . accordingly , the invention is limited only by the appended claims and equivalents thereto .
markers , methods of marking , and marking systems for use in association with images are disclosed . one marker is removable with a targeted design and metric dimensions inscribed on a clear plastic flap . this marker is attached adjacent to an area of interest with the target placed in such a manner to precisely pin point out an observed abnormality . a paper label at one edge is available for written comments and directions for further studies . the marker can be removed without damage to the image .