A system of instruction in X-ray methods and medical uses of light, hot-air, vibration and high-frequency currents - a pictorial system of teaching by clinical instruction plates with explanatory text (14570353229)

Identifier: systemofinstruct00mone (find matches)
Title: A system of instruction in X-ray methods and medical uses of light, hot-air, vibration and high-frequency currents : a pictorial system of teaching by clinical instruction plates with explanatory text : a series of photographic clinics in standard uses of scientific therapeutic apparatus for surgical and medical practitioners : prepared especially for the post-graduate home study of surgeons, general physicians, dentists, dermatologists and specialists in the treatment of chronic diseases, and sanitarium practice
Year: 1902 (1900s)
Authors: Monell, S. H. (Samuel Howard), d. 1918
Subjects: Vibration X-rays Diagnosis, Radioscopic Thermotherapy Electrotherapeutics X-Ray Therapy Vibration Diagnosis
Publisher: New York : E.R. Pelton
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School



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STUDIES IN THE X-EAY DIAGNOSIS OF CALCULI 301 the negative. V^Hiere the negative secured fulfils the requisite condi-tions the experienced eye can detect or exclude all calculi. In somecases, as in very corpulent or muscular subjects, it is not yet alwayspossible to secure a negative with the essential detail, but when thenegative is correct the diagnosis is absolute. Exhaustive studies bySwain, Ringel, Wagner, Buget, Gascard, and others have shown thatrenal calculi have varying degrees of opacity to the X-rays correspond-ing with their chemical composition. Oxalates are the most opaque,phosphates next, carbonates the same, and uric-acid calculi least. Sizeis more important than composition, and even the least dense uric-acidkind have been well shadowed on the plate. The cases in which theauthor has so far demonstrated the absolute mathematical accuracy ofthe method number 165. The method is based on the axiom that if rays are employed thatwill differentiate between the shadows of tis