. Elementary and dental radiography / by Howard Riley Raper . Fig. 379. Pose for mastoids. {Interstate Medical Journal.) tensifier is simplicity itself. It consists of heavy lead plate which fitsinto a surrounding heavy iron frame; both are covered with felt. Placethe intensifier on the plate. The lead plate is now removed and thepatients head is placed in the frame. The exposure is made and the leadplate replaced. The iron frame is then removed carefully, leaving the leadplate covering the part which has been exposed. Two flashes of the X-rays, after the removal of the frame, exposes the phot
. Elementary and dental radiography / by Howard Riley Raper . Fig. 379. Pose for mastoids. {Interstate Medical Journal.) tensifier is simplicity itself. It consists of heavy lead plate which fitsinto a surrounding heavy iron frame; both are covered with felt. Placethe intensifier on the plate. The lead plate is now removed and thepatients head is placed in the frame. The exposure is made and the leadplate replaced. The iron frame is then removed carefully, leaving the leadplate covering the part which has been exposed. Two flashes of the X-rays, after the removal of the frame, exposes the photographic platewhere the frame has rested and makes the negative black, except justthat part of it on which the radiograph appears. MAKIXG DENTAL RADIOGRAPHS 345 Figure 381 illustrates a kassett or plate holderKassett. which may be used instead of envelopes to protect plates from light while handling them to make radio-graphs. Kassetts are especially useful when intensifying screens are Fig. 380. Frontal sinus intensifies
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