. Radiography and radio-therapeutics . Fig. 323, p. 407). Where this is not possible a protective shield should be provided behindwhich the operator can have all the apparatus under his control and at thesame time be able to observe, through the lead glass window, the behaviour EQUIPMENT OF A RADIO-THERAPEUTIC DEPARTMENT 553 of the Fig. 402 shows in detail the construction of the screen and aconvenient arrangement of the necessary apparatus, while in Fig. 403 thesame screen is shown in position in the radiographic department with anX-ray tube arranged for use. The estimation of the dosa
. Radiography and radio-therapeutics . Fig. 323, p. 407). Where this is not possible a protective shield should be provided behindwhich the operator can have all the apparatus under his control and at thesame time be able to observe, through the lead glass window, the behaviour EQUIPMENT OF A RADIO-THERAPEUTIC DEPARTMENT 553 of the Fig. 402 shows in detail the construction of the screen and aconvenient arrangement of the necessary apparatus, while in Fig. 403 thesame screen is shown in position in the radiographic department with anX-ray tube arranged for use. The estimation of the dosage is another matter of great methods employed for this purpose have been fully dealt with in anothersection of this work, but it might be well to state that the method generallyemployed at present is that of the pastille of Sabouraud and Noire or modi-fications (see pp. 425 to 438). A Lovibond or Cox tintometer will be founduseful when the pastille method of measurement is used. i- 33 ii- Overhead hign-tensiorl Cables. X Ray tube-holder withmechanical movementsfor quick adjustment Fig. 403.—Apparatus arranged for therapeutic work, showing protective screen in position. In addition to X-ray generating apparatus, it might be well to provideaccessory apparatus such as diathermy or high-frequency outfits, sincethese are often valuable adjuncts to X-ray and radium , a multostat, for the production of continuous and alternatingcurrents, and an attachment for vibratory massage, will be fomid useful. Ultra-violet radiations are often used in conjunction with other morepenetrating rays, so some source of these radiations should be provided. The radium equipment will vary according to the amount of workwhich has to be carried on. The quantity of radium required will dependupon the same factor. 1 When the Coolidge tuhe is used, the operator watches the behaviour of the ampere-meter in the heating circuit and the milliamperemeter in the secondary cir
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