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Cancer Treatment and Research Foundation of Nova Scotia, 5820 University Avenue, Halifax, Nova Scotia, Canada B3H 1V7
This excerpt was created in the absence of an abstract.
There are several manufacturers of the newer type of high dose rate (HDR) remote afterloading equipment where a small iridium-192 source can be programmed to stop for a given time at any point in the treatment catheters. The quality assurance phantom described in this paper was developed for a Nucletron microSelectron-HDR (Nucletron International BV, Veenendaal, Netherlands), but as the systems are so similar the device can be modified for any of the HDR systems. Because the complete treatments may be given in just few minutes with HDR remote afterloading equipment it is extremely important to perform adequate quality control (QC) checks on the equipment before use. Several papers have been written on the extent of such procedures to be carried out at calibration (Ezzell, 1989a, b, 1991; Ingham et al, 1989; Jones & Bidmead, 1989; Flynn & Workman, 1991) and before each use (Ingham et al, 1989; Jones, 1989; Ezzell, 1990; Flynn, 1990). As full calibration is carried out only when the iridium-192 source is changed every 3 months a comprehensive set of QC checks should be made at that time (Flynn, 1990). Because of time constraints it is not usually possible to perform all these same tests on daily basis and a small subset of important parameters has to be selected. Daily QC should at least cover four specific areas:
Received for publication March 29, 1992. Revision received August 26, 1992. Accepted for publication September 21, 1992.
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