1. An imaging apparatus for imaging an object, the imaging apparatus ( 1 ) comprising: a first image providing unit ( 7 ) for providing a first image ( 25 ) of the object, a second image providing unit ( 11 ) for a providing a second image ( 27 ) of the object, a geometric relation determination unit ( 10 ) for determining a geometric relation between the first image ( 25 ) and the second image ( 27 ), a marker determination unit ( 14 ) for determining corresponding marker locations in the first and second images ( 25 , 27 ) and marker appearances based on the geometric relation such that a first location in the first image ( 25 ) and a second location in the second image ( 27 ) show the same part of the object and such that the marker appearances of a first marker ( 30 ) to be located at the first location and of a second marker ( 26 ) to be located at the second location are indicative of the geometric relation between the first image ( 25 ) and the second image ( 27 ), a display unit ( 16 ) for showing the first image ( 25 ) with the first marker ( 30 ) at the first location and the second image ( 27 ) with the second marker ( 26 ) at the second location.