In radiography,<unk>  is tomography (imaging a single<unk> , or slice, of an object) by simultaneously moving the X-ray generator and X-ray detector so as to keep a consistent exposure of only the<unk>  of interest during image acquisition. This was the main method of obtaining tomographs in medical imaging until the late-1970s. It has since been largely replaced by more advanced imaging techniques such as CT and MRI. It remains in use today in a few specialized applications, such as for acquiring orthopantomographs of the jaw in dental radiography.<unk> ’s development began in the 1930s by the Italian radiologist Alessandro Vallebona as a means of reducing the problem of superimposition of structures which is inherent to projectional radiography.
Focal plane tomography
Neutron imaging
Paleopathology
Radiomics
Narrow-band imaging
Radiofluorination
Photon-counting computed tomography
Needle-localized biopsy