. Radiography, X-ray therapeutics and radium therapy . sed in X-ray therapy should be under the complete controlof the operator. Any type of tube may be used, but it is important to havesuch control of it that the type of ray best suited to a particular case maybe produced. It is not sufficient simply to turn on a switch with any tubeand give a few minutes exposure to the rays. That method sufficed inthe davs when little was known of the technique of X-ray treatment,but now we must be able so to manipulate the apparatus that results maybe obtained with a degree of certainty. The elaboration of
. Radiography, X-ray therapeutics and radium therapy . sed in X-ray therapy should be under the complete controlof the operator. Any type of tube may be used, but it is important to havesuch control of it that the type of ray best suited to a particular case maybe produced. It is not sufficient simply to turn on a switch with any tubeand give a few minutes exposure to the rays. That method sufficed inthe davs when little was known of the technique of X-ray treatment,but now we must be able so to manipulate the apparatus that results maybe obtained with a degree of certainty. The elaboration of the installation has been the necessary outcome ofthe experience of individual workers. Consequently, at the present time THE THERAPEUTIC TUBE STAND 275 we are still far removed from a standardisation of apparatus, tubes, anddosage. Before uniform results can be turned out this standardisation mustbecome an established fact. It has been the aim of the writer to reduce,so far as is possible, all the installations under his care to a uniform Fig. 195.—Method of connecting coil to valvetube and X-ray tube. Valve tube on positivepole (Siemens).
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