<unk>  generally uses mechanical movement of an X-ray source and film in unison to generate a tomogram using the principles of projective geometry. Synchronizing the movement of the radiation source and detector which are situated in the opposite direction from each other causes structures which are not in the<unk><unk>  being studied to blur out. Limitations The blurring provided by<unk>  is only marginally effective, since it only occurs in the X<unk> . Moreover, since<unk>  uses plain X-rays, it is not particularly effective at resolving soft tissues. The increased availability and power of computers in the 1960s and 70s gave rise to new imaging techniques such as CT and MRI which use computational (in addition to or in lieu of mechanical) methods to acquire and process tomographic image data, and which do not suffer from the limitations of<unk> .
Focal plane tomography
Neutron imaging
Paleopathology
Radiomics
Narrow-band imaging
Radiofluorination
Photon-counting computed tomography
Needle-localized biopsy