. Radiography and radio-therapeutics . t work is on theincrease. The screen examinationis of the greatest possible value,but the radiograph, to be of anyservice, must be taken with theshortest possible exposure. In the ^wu oi a second it is possible to showthe shape of the heart in inspiration and expiration, and even in the stagesof a complete cardiac cycle when the plates can be changed rapidly. Further valuable work has been initiated by Dr. A. W. Crane,1 whohas produced radiographic tracings of the movements of the heart, whichare of value when compared with the tracings taken with the ele
. Radiography and radio-therapeutics . t work is on theincrease. The screen examinationis of the greatest possible value,but the radiograph, to be of anyservice, must be taken with theshortest possible exposure. In the ^wu oi a second it is possible to showthe shape of the heart in inspiration and expiration, and even in the stagesof a complete cardiac cycle when the plates can be changed rapidly. Further valuable work has been initiated by Dr. A. W. Crane,1 whohas produced radiographic tracings of the movements of the heart, whichare of value when compared with the tracings taken with the electrocardio-graph and the sphygmograph. These are obtained by the use of a specialplate-changing mechanism, which slowly moves the plate over a horizontalslit diaphragm. The tube is active during a considerable period of time, whilethe plate moves slowly over the slit in the diaphragm. The appearanceof a plate so exposed is extremely instructive and interesting, and serves,to indicate yet another useful field for radiographic Fig. 256a.—Radiograph of heart showing atheromaof coronary arteries. Post-mortem specimen. 1 Rontgenology of the Heart (American Journal of Rontgenology, Nov. 1916). THE X-RAY EXAMINATION OF THE ALIMENTARY SYSTEM The routine examination of the alimentary system with the aid ofX-rays is one of growing importance to the radiologist. The value of thisdiagnostic agent in practical medicine and surgery is rapidly becomingapparent, but only by the hearty co-operation of the radiologist, the prac-tising surgeon, and the physician can we secure the full benefit of its radioscopic and radiographic evidence is always obtainable, but whatis wanted is the accurate interpretation of this evidence. This can only beobtained as the result of accumulated experience. What is becoming veryevident is the fact that in radiography we have an agent which enables usto distinguish pathological processes in the living subject at an earlier stagethan those found
Size: 1312px × 1905px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidradiographyr, bookyear1919
