Manson D J, Velkley D, Purdy J A, Oliver G D
Radiology. 1975 May;115(2):473-4. doi: 10.1148/115.2.473.
Surface dose was measured in an extrapolation chamber and was found to be less than previously reported. The slope of the build-up curve was less steep with the Clinac 4 than with 60-Co and much steeper with the Clinac 35 at 25 MV than with the betatron at the same energy. The gradient of the depth-dose curve in the build-up region is probably the best indicator of skin damage.
表面剂量在外推电离室中进行测量，结果发现其低于先前报告的值。Clinac 4的剂量建成曲线斜率比60钴的更平缓，而25兆伏的Clinac 35的剂量建成曲线斜率比相同能量的电子感应加速器的要陡得多。剂量建成区的深度剂量曲线梯度可能是皮肤损伤的最佳指标。
