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 (14570296929)

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



Text Appearing Before Image:
Plate 43.—Plate Three of Williams Series of Hip Exposures. The inner sides of thefeet were placed together and the anode over the letter A directly on the centre of the unionof shaft and neck. The result is therefore a normal neck with the proper angle. But thisposture throws the shadow of the basin out of true, and again illustrates the fact that the axisof the rays can be in but one place at a time in a radiograph. It must be placed where therequirements of diagnosis demand it and not simply at random over a general part.
Text Appearing After Image:
Plate 44.—Plate Four of Williams ISeries of Hip Exposures. The letter A shows wherethe anode focussed for this radiograph of the same hip. Were it not that the bone was rotatedinward by placing the feet together, the greater tuberosity and head would be practically pro-ducing a false appearance, as of the condition termed coxa vara. This does not exhibit the inaccuracy of X-rays, but only the need of focussing the vertical axis on the direct field ofdiagnosis instead of taking the essential part of the picture by slanting light that carries theshadow out of line. The operator controls the accuracy of his results. Study this chapter ondistortion and it will be easy to avoid distortion. STUDIES IN DISTORTION 197 the line of transmission. The obvious simplicity of the principle com-mends it greatly to surgical use. A valuable article was recently presented by Williams, of London,and from it we may read with profit the following extracts, referringat the same time to Plates No. 41, 42,