. The American journal of roentgenology, radium therapy and nuclear medicine . - Diai)hra,^m Principle Applied to Roentgenography to 4 inches, for this always produces often glutted out hy aberrant rays ar( complete invisibility. preserved. The exposure time for plates made with The field of usefulness for this diaphragm this arrangement is somewhat increased by ing instrument is, as would be expected, it. Fig. 3. Diaphragm Arrangement in Position forUse Under Canvas-Topped Tadle. Tube 25inches above. the absorption of some of the direct ra\s In-the edges of the metal strips and by thewood use
. The American journal of roentgenology, radium therapy and nuclear medicine . - Diai)hra,^m Principle Applied to Roentgenography to 4 inches, for this always produces often glutted out hy aberrant rays ar( complete invisibility. preserved. The exposure time for plates made with The field of usefulness for this diaphragm this arrangement is somewhat increased by ing instrument is, as would be expected, it. Fig. 3. Diaphragm Arrangement in Position forUse Under Canvas-Topped Tadle. Tube 25inches above. the absorption of some of the direct ra\s In-the edges of the metal strips and by thewood used above the grid and for loss of speed is compensated for, how-ever, by the fact that with this arrangementit is possible and advisable to use ravs of agreater penetrability than by plain radi-ography. With (Ordinary .I-ray emulsions afull five-inch spark equivalent is used with-out obtaining on the plates that objectionablefog so common with this gap. At the sametime the detail in all osseous structures isgreatly increased by this full penetration,and the markings in the softer structures so
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Keywords: ., bookcentury1900, bookdecade1900, bookidamericanjour, bookyear1906
