Machine specific equivalent squares for two commonly employed blocked treatment fields.
In an attempt to find the most suitable method for determining the equivalent square for two commonly employed blocked field arrangements, a comparison of measured outputs was made for four different treatment machines. The machines varied by manufacturer, design, and energy. The fields in question were a midline-blocked field and a half-blocked field. The data obtained was used to streamline calculations made by technologists for the original treatment setting. It was further used to enhance the accuracy of computer-generated verification of the original setting. The authors recommend that each institution employing such fields consider obtaining similar data for their own treatment machines.
Bombardiere
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FA
Elliot Hospital, Manchester, NH 03103.
Ouellette
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R
D006801:Humans; D011867:Radioisotope Teletherapy / Q000295:instrumentation*; D011874:Radiometry / Q000379:methods*; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy / Q000295:instrumentation*; D013679:Technology, Radiologic