van Herk M, Bel A, Gilhuijs K G, Lebesque J V, van Dalen A, van der Ven P, Vijlbrief R
Radiotherapy Department, Netherlands Cancer Institute, Amsterdam.
Bull Cancer. 1995 Dec;82 Suppl 5:601s-606s.
In our institute, we have developed an electronic portal imaging system based on a matrix of 256 x 256 ionisation chambers. By improvements to the electronics, the system produces images with the same quality as the original system but 3-10 times faster. Software for automatic image analysis has been applied to more than 10,000 images over the last two years. Using an off-line correction strategy, the systematic patient set-up error has been limited to 5 mm or less for 98% of the patients treated for prostate cancer.
在我们研究所，我们基于一个256×256电离室矩阵开发了一种电子门静脉成像系统。通过改进电子设备，该系统能产生与原系统质量相同但速度快3至10倍的图像。在过去两年里，自动图像分析软件已应用于10000多张图像。采用离线校正策略，对于98%接受前列腺癌治疗的患者，系统的患者摆位误差已被限制在5毫米或更小。
