Butson M J, Mathur J N, Metcalfe P E
Illawarra Cancer Care Centre, Department of Radiotherapy, Wollongong NSW, Australia.
Phys Med Biol. 1996 Jun;41(6):1073-8. doi: 10.1088/0031-9155/41/6/011.
Radiochromic film is shown to be a useful surface-dose detector for radiotherapy x-ray beams. Central-axis percentage surface-dose results as measured by Gafchromic film for a 6 MVp x-ray beam produced by a Varian 2100C Linac at 100 cm SSD are 16%, 25%, 35%, 41% for 10, 20, 30 and 40 cm square field sizes, respectively. Using a simple, uniform light source and a CCD camera connected to an image analysis system, quantitative 3D surface doses are accurately attainable in real time as either numerical data, a black-and-white image or a colour-enhanced image.
放射变色薄膜被证明是一种用于放射治疗X射线束的有用表面剂量探测器。由瓦里安2100C直线加速器在100 cm源皮距下产生的6 MVp X射线束，通过Gafchromic薄膜测量的中心轴表面剂量百分比结果，对于10、20、30和40平方厘米的射野尺寸，分别为16%、25%、35%、41%。使用一个简单的均匀光源和连接到图像分析系统的CCD相机，可以实时准确地获得定量的三维表面剂量，以数值数据、黑白图像或彩色增强图像的形式呈现。
