Development of Radiographic Contrast-Enhancement Masks
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چکیده
Radiographic contrast-enhancement mask (RCM) algorithms were developed to overcome some limitations of general digital radiography (DR). Large attenuation differences of some anatomical regions result in exit radiation having a wide dynamic range. In general radiography, this results in anatomy not being fully visualised in the image or being displayed with suboptimal contrast. Physical tissue compensation filters (TCFs) are used in film/screen (F/S) general radiography to assist in overcoming this limitation. Digital radiographic images have a large dynamic range and hence not all the diagnostic information within this dynamic range can be displayed with acceptable image contrast. In DR, users can alter image brightness and contrast. This and other post-processing functions discussed in Chapter 5 allow users to compensate for large anatomical attenuation differences. These post-processing routines can assist in overcoming such limitations of general DR.
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