. Practical radiography : a handbook for physicians, surgeons, and other users of X-rays . eight from the floor (forradioscopy), and to make it project far enough from itssupport to be brought over a bed or the operating base should be very heavy to ensure perfect steadiness,and all the moving parts must be very rigid. If there areany swivel and ball joints they must be accurately workedand must clamp firmly, as otherwise the tube (owing tothe vibration communicated to it through the connectingwires from the coil) would change its position during longexposures. If such stands are mad
. Practical radiography : a handbook for physicians, surgeons, and other users of X-rays . eight from the floor (forradioscopy), and to make it project far enough from itssupport to be brought over a bed or the operating base should be very heavy to ensure perfect steadiness,and all the moving parts must be very rigid. If there areany swivel and ball joints they must be accurately workedand must clamp firmly, as otherwise the tube (owing tothe vibration communicated to it through the connectingwires from the coil) would change its position during longexposures. If such stands are made of metal, all those 112 Practical Radiography parts which are near the tube or the connecting wires,particularly the tube-clamp itself, should be made of woodor ebonite, so as to prevent sparking from the terminalsinto the metal, which may be dangerous to the patient andalso to the tube, which gets easily perforated. Figs. 55 and56 show good holders having all necessary movements. Except in those cases where a radiogram has to beobtained whilst the patient is in bed, or where we only. Fig. 54. require to examine or radiograph the extremities, somesuitable table or couch should be provided. There are avariety of excellent constructions which show more or lessthe same principal features : A strong wooden frame overwhich sailcloth or thin leather or some equally strong yetradioscopically transparent material is tightly stretched;the tube is then placed below the couch, and the patientreposing on the couch may be very conveniently examined Plate VIII. ]
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectxrays, bookyear1901
