The Measurement of Isodose Curves of a Cobalt Unit by a Photographic Technique

[摘要] A method is described whereby the isodose curves of a cobalt unit were measured, using a simple photographic technique. The methOd reduces the effects of experimental errors and artifacts by cross_plotting the constants of decrement liner. The method is self-calibrating, and affords a useful allernative to the more usual water phantom pro:edures, in cases when this apparatuS is not available