. Röntgen ray diagnosis and therapy . pects ofthe Kontgen rays, are simply impossible. Bone-fissures cannotescape detection. KONTGEN TECHNIQUE 35 The original diaphragm con-sisted simply of a sheet of leadinto which a hole was cut. , for instance, shows a dia-phragm of a diameter of 2 inch-es, which is traversed hy the raysemanating from a tube placedabove. Besides the rays fromthe target (aa), those emanat-ing from the tubal wall (bb)pass the hole in the a certain amount of diffu-sion is still produced. To obvi-ate this, tubular diaphragmswere constructed which permitthe
. Röntgen ray diagnosis and therapy . pects ofthe Kontgen rays, are simply impossible. Bone-fissures cannotescape detection. KONTGEN TECHNIQUE 35 The original diaphragm con-sisted simply of a sheet of leadinto which a hole was cut. , for instance, shows a dia-phragm of a diameter of 2 inch-es, which is traversed hy the raysemanating from a tube placedabove. Besides the rays fromthe target (aa), those emanat-ing from the tubal wall (bb)pass the hole in the a certain amount of diffu-sion is still produced. To obvi-ate this, tubular diaphragmswere constructed which permitthe passing of the focal raysonly, those emanating from thetubal wall being excluded. shows the principle of thetubular diaphragm, which ispassed by the focal rays (aa), while the rays emanating from thetubal wall (bb) are reflected. The use of the simple form of a lead diaphragm is illustratedby Fig. 21. Albers-Schoenberg deserves great credit for having constructeda compression diaphragm (Fig. 22), which not only prevents diffu-. FlG. 22. — Simple Compression Dia-phragm.
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