Zwicker R D, Wu A, Sternick E S
Medical College of Virginia, Richmond 23298.
Med Phys. 1991 Nov-Dec;18(6):1251-3. doi: 10.1118/1.596599.
This work reports the results of an experiment carried out to investigate the compatibility of TG-21 ion chamber calibration with Fricke dosimetry near the extremes of the clinically available megavoltage photon energy range. Doses determined from ion chamber measurements and from chemical dosimetry are compared for a 6-MV linear accelerator x-ray beam and 45-MV betatron beam. The Fricke dosimetry was carried out by the National Institute of Standards and Technology. Agreement within 1% between the two techniques was obtained at both photon energies using a currently accepted G-value.
本研究报告了一项实验的结果，该实验旨在研究在临床可用的兆伏级光子能量范围的极值附近，TG-21电离室校准与弗里克剂量测定法的兼容性。针对6兆伏直线加速器X射线束和45兆伏电子感应加速器束，比较了通过电离室测量和化学剂量测定法确定的剂量。弗里克剂量测定法由美国国家标准与技术研究院进行。在两种光子能量下，使用当前公认的G值，两种技术之间的一致性在1%以内。
