Moeller J H, Leavitt D D, Klein E
Department of Radiation Oncology, University of Utah Medical Center, Salt Lake City 84132, USA.
Med Dosim. 1997 Fall;22(3):241-6. doi: 10.1016/s0958-3947(97)00026-5.
Dynamic wedge distributions are produced by closing one jaw continuously while simultaneously controlling dose as each position of the jaw. This method of producing wedge distributions requires more frequent Quality Assurance checks, such as verification of wedge profile, wedge factor and verification of the accuracy of the digital position readout for the jaws used for dynamic wedge. "Hard" wedges require only the verification of wedge factor and the verification of reproducibility of mechanical position in the beam. This paper will discuss methods and equipment used for the Quality Assurance of Enhanced Dynamic Wedges.
动态楔形野剂量分布是通过连续关闭一个准直器叶片，同时在叶片的每个位置控制剂量来产生的。这种产生楔形野剂量分布的方法需要更频繁的质量保证检查，例如楔形野剂量分布曲线、楔形因子的验证以及用于动态楔形野的准直器叶片数字位置读数准确性的验证。“硬”楔形板仅需要验证楔形因子以及射束中机械位置的可重复性。本文将讨论用于增强动态楔形野质量保证的方法和设备。
