| Popis: |
So long as the x-ray motion picture is regarded as a supplement of the fluoroscopic examination and is judged by fluoroscopic standards, the detail and definition of the small film will not appear too unsatisfactory. Any moving object conspicuous enough to be at all perceptible on the fluoroscopic screen will be still more plainly visible on a properly taken motion picture film. Indeed the cinefluorographic record can be said to have no equal in clearing up doubtful fluoroscopic findings having to do with disturbances of swallowing, calcifications within and around the heart, and abnormal movements of the diaphragm or mediastinum. When cinefluorography is applied to subjects outside the fluoroscopic range, and especially when it is applied to research problems, the lack of definition is not so easy to put up with. In this kind of work repeated viewing of the film as a motion picture is not enough. The investigator will want to compare different stages of the action side by side on individual frames of fil... |
