. Radiography, x-ray therapeutics and radium therapy .

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$. Radiography, x-ray therapeutics and radium therapy . #. ^ ^..^■^Hfei^. ^^^^^^ Air supply Rpservoirlor water Fig. 216.—Dessaeur therapeutic tube. factmed a tube which emits a particularly hard ray, and which he claimsto be approximately as good as the Gamma-ray of radium. The tube isfitted with a spray which impinges a stream of water vapour upon the backof the anti-cathode. If this tube possesses a fraction of the power which isclaimed for it, it should be a good tube for deep therapeutic work. Butin all probabiHty the Coohdge tube will be the main stand-by of the radio-therapist in the futu Stock Photo$

RM2CRNRC8–. Radiography, x-ray therapeutics and radium therapy . #. ^ ^..^■^Hfei^. ^^^^^^ Air supply Rpservoirlor water Fig. 216.—Dessaeur therapeutic tube. factmed a tube which emits a particularly hard ray, and which he claimsto be approximately as good as the Gamma-ray of radium. The tube isfitted with a spray which impinges a stream of water vapour upon the backof the anti-cathode. If this tube possesses a fraction of the power which isclaimed for it, it should be a good tube for deep therapeutic work. Butin all probabiHty the Coohdge tube will be the main stand-by of the radio-therapist in the futu

RM2CRHE63–. Radiography, X-ray therapeutics and radium therapy . Pii 213.—Diagram to illustrate a method of circulating water to the anti- UimiUm givescathode of a tube. (Schall.)The tube is shown unprotected. This would not occur in actual practice. quite good re- sults, with hardly any reaction, and only slight delay in the epilation. So that even forthe most superficial conditions we may have to treat, a hard ray canbe employed and a filter used. The Coolidge tube promises to beof great value in therapeutics. With its ready adjustment of quality THERAPEUTIC TUBES 295 of ray emitted from the tube it s

RM2CRJFWE–. Radiography, x-ray therapeutics and radium therapy . usefilter of I mm. of alu- FiG. 213.—Diagram to illustrate a method of circulating water to the anti cathode of a tube. (Schall.) The tube is shown unprotected. This would not occur in actual practice. mmium givesquite good re-sults, with hardly any reaction, and only slight delay in the epilation. So that even forthe most superficial conditions we may have to treat, a hard ray canbe employed and a filter used. The Coohdge tube promises to beof great value in therapeutics. With its ready adjustment of quality THERAPEUTIC TUBES 295 of ray e

RM2CRK3HG–. Radiography, X-ray therapeutics and radium therapy . ap is measured, andgives approximately the hardness of the X-raybulb. The spintermeter may be attached tothe coil, or more conveniently mounted on aseparate base, and placed at some distancefrom the coil. The Bauer Qualimeter is an instrumentfor determining the degree of hardness of theX-ray tube. It is useful, but not always to berelied upon. This instrument is connected by a wire tothe negative terminal of the coil or the cathodeof the tube. It is a static electrometer andcondenser which indicates automatically thepotential of the cathod

RM2CRM45D–. Radiography, x-ray therapeutics and radium therapy . l ray from the tube can always be located by means of a plumb-lineoperating over the top of the couch. This may also be used for getting thecentre of the plate exactly in the centre of the part to be examined. The part of the patient to be examined should always be as close tothe plate as possible. On the couch some form of compression must beemployed to keep the parts as quiet as possible. When the screening-standis used, the part is first examined by the aid of the fluorescent screen, and 96 EADIOGRAPHY the diaphragm adjusted to cover th

RM2CRJT2F–. Radiography, X-ray therapeutics and radium therapy . osi-tions should suffice to indicate the position of the foreign body. The cross-thread method of localisation should be employed as a confirmatory measure. Localisation of Foreign Bodies in the Skull. — The methods SIMPLE METHODS OF LOCALISATION 119 available are (a) stereoscopic ; (6) stereoscopic combined with MackenzieDavidson method. A simple method may be employed when it is not possible to haveaccess to the two methods referred to. It is one which anyone possessing anX-ray installation can carry out, and which has proved useful in m

RM2CRP960–. Radiography, x-ray therapeutics and radium therapy . l ray from the tube can always be located by means of a plumb-Hneoperating over the top of the couch. This may also be used for getting thecentre of the plate exactly in the centre of the part to be examined. The part of the patient to be examined should always be as close tothe plate as possible. On the couch some form of compression must beemployed to keep the parts as quiet as possible. When the screening-standis used, the part is first examined by the aid of the fluorescent screen, and 96 EADIOGRAPHY the diaphragm adjusted to cover the

RM2CRP929–. Radiography, x-ray therapeutics and radium therapy . osi-tions should sufiice to indicate the position of the foreign body. The cross-thread method of localisation should be employed as a confirmatory measure. Localisation of Foreign Bodies in the Skull. — The methods SIMPLE METHODS OF LOCALISATION 119 available are (a) stereoscopic ; (6) stereoscopic combined with MackenzieDavidson method. A simple method may be employed when it is not possible to haveaccess to the two methods referred to. It is one which anyone possessing anX-ray installation can carry out, and which has proved useful in m

RM2CRJX27–. Radiography, X-ray therapeutics and radium therapy . l ray from the tube can always be located by means of a plumb-lineoperating over the top of the couch. This may also be used for getting thecentre of the plate exactly in the centre of the part to be examined. The part of the patient to be examined should always be as close tothe plate as possible. On the couch some form of compression must beemployed to keep the parts as quiet as possible. When the screening-standis used, the part is first examined by the aid of the fluorescent screen, and 96 RADIOGRAPHY the diaphragm adjusted to cover th

RM2CRK5D6–. Radiography, X-ray therapeutics and radium therapy . ording to the position of theX-ray tube, so as to permit of the aperture being always uppermost. If desired, the water can be circulated through the tube by means of the 3 34 RADIOGRAPHY syphon mentioned above. This is very efficacious, but necessary only whenvery lengthy runs are being undertaken. There is another type of tube made by several makers which is veryefficient and convenient for treatment. This tube has a diameter of about5 inches (125 mm.). As will be seen from Fig. 215, p. 295, an auxiliary bulb(having a diameter of about Qh

RM2CRHJG7–. Radiography, X-ray therapeutics and radium therapy . n of radium. The degree of action induced is dependent upon the method of applica-tion. The various degrees of tissue change depend upon the filtration em-ployed and the length of the exposure. Thus, if necrosis of the growth isnecessary, a thin filter would be used and a long exposure given. Here weare making use of the Beta ray almost entirely. Should it be necessary to acton a deeper structure and at the same time protect the skin from such action,a thick filter of platinum or lead is used. Two millimetres of platinum orfour of lead are

RM2CRM2MC–. Radiography, x-ray therapeutics and radium therapy . si-tions should sufiice to indicate the position of the foreign body. The cross-thread method of localisation should be employed as a confirmatory measure. Localisation of Foreig-n Bodies in the Skull. — The methods SIMPLE METHODS OF LOCALISATION 119 available are (a) stereoscopic ; (6) stereoscopic combined with MackenzieDavidson method. A simple method may be employed when it is not possible to haveaccess to the two methods referred to. It is one which anyone possessing anX-ray installation can carry out, and which has proved useful in m

RM2CRJNKW–. Radiography, x-ray therapeutics and radium therapy . ree of action induced is dependent upon the method of applica-tion. The various degrees of tissue change depend upon the filtration em-ployed and the length of the exposure. Thus, if necrosis of the growth isnecessary, a thin filter would be used and a long exposure given. Here weare making use of the Beta ray almost entirely. Should it be necessary to acton a deeper structure and at the same time protect the skin from such action,a thick filter of platinum or lead is used. Two millimetres of platinum orfour of lead are sufiicient to cut o

. Radiography, x-ray therapeutics and radium therapy .

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