. The American journal of roentgenology, radium therapy and nuclear medicine . ch case being the same? Theproper curves for this case are Figure8. For the circle a is 5 cm., the distance13 cm.) is , the value for the circle atthis distance is per cent of that fromthe point at the same distance. For therectangle, a is () cm. and the distance16 cm.) is a. The value in this C;im per cent that of the point source at The Effect of the Size of Radium Applicators on Skin Doses 675 the same distance. But the intensity ofradiation due to the point source at 3 *9 that at 1 cm., and
. The American journal of roentgenology, radium therapy and nuclear medicine . ch case being the same? Theproper curves for this case are Figure8. For the circle a is 5 cm., the distance13 cm.) is , the value for the circle atthis distance is per cent of that fromthe point at the same distance. For therectangle, a is () cm. and the distance16 cm.) is a. The value in this C;im per cent that of the point source at The Effect of the Size of Radium Applicators on Skin Doses 675 the same distance. But the intensity ofradiation due to the point source at 3 *9 that at 1 cm., and at 6 cm. ) £6 thatat 1 cm., according to the inverse squarelaw. So if we adopt the effect due to thepoint at 1 cm. as a unit, the circle at 3 cm. will give ., per cent = per cent, and the rectangle at 6 cm. will give ) 36 x pel- cent per cent. Tai 11 II Filter Filtration Factor None (glass capillary) 1 on mm. brass + mm. rubber mm. brass + mm. rubber mm. brass + mm. rubber mm. brass + mm. rubber V. 3
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