ABSTRACT
The potential use of computerized image intensification and its distinct imaging algorithms is just beginning. Since many of these algorithms, including those which appear to be most useful, only require processing of conventional image-intensified images, the apparatus needed for computerization may become readily available as an accessory item to upgrade an existing fluoroscopic image-intensified system. X-ray exposures required for the imaging and subtraction methods may be comparable to those used in computerized tomography. The required exposure increases as spatial resolution requirements are increased and as the contrast of the subject to be imaged is decreased. Mask mode image intensification and radiography may be accomplished by two separate techniques. Pure digital subtraction, in which preinjection images and postinjection images are identically processed, provides the most precise cancellation of anatomy and flexibility in terms of processing options. Encounter with the combination technique has established that good images may be obtained of the heart, lungs, and kidneys.
