Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 0 1-2 1968 06 15 The Measurement of Isodose Curves of a Cobalt Unit by a Photographic Technique 13 28 W.H. Fry A. Inst. E. Majoubi A. Jalali 2015 09 28 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 https://acta.tums.ac.ir/index.php/acta/article/view/4089 https://acta.tums.ac.ir/index.php/acta/article/download/4089/4064