. The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students . Fig. 388. Shows a radiogiaph of the calculi after thoy had been removed from the kidney. ances seen on the radiograph, — as often the dry negative will revealclearly what the print at most suggests. Further, some things may beseen during the development of the plate, which are not apparent Fig. 389. Radiograph of the kidney after removal. Comparison of X-Ray Negative and Fluorescent Screen. — The fluo-rescent screen is not so satisfactory
. The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students . Fig. 388. Shows a radiogiaph of the calculi after thoy had been removed from the kidney. ances seen on the radiograph, — as often the dry negative will revealclearly what the print at most suggests. Further, some things may beseen during the development of the plate, which are not apparent Fig. 389. Radiograph of the kidney after removal. Comparison of X-Ray Negative and Fluorescent Screen. — The fluo-rescent screen is not so satisfactory as X-ray negatives in making exami- CALCULI 621 nations for calculi, and should not be employed for this purpose, for,unless the stones are large and made up of oxalate or phosphate of cal-cium, they would not be detected on the fluorescent screen. Fenwicks Method of Examination of Kidney outside the Body.—Fenwick ^ has examined the kidney with the fluorescent screen after ithas been taken out from the patients loin. This procedure, as he states,would not always be possible, as in some patients the blood vessels aretoo short to permit of it; further, this method might entail delay, for ifthe surgeon who took out the kidney should also make the X-ray ex-amination, he would be obliged to remain in a darkened room for tenminutes before he could use the fluorescent screen properly, as it wouldbe entirely useless to give any weight to t
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