论文标题
辐射梁扫描仪的构建和对梁孔孔孔的体积平均校正因子的影响的研究
Construction of a radiation beam scanner and investigation of volume averaging correction factor effects on beam-profile
论文作者
论文摘要
在辐射束核测量值中，必须精确地定位具有高位置分辨率的检测器。为此，我们构建了一个扫描设备，能够使用商业3D打印机中的零件在三个维度上移动检测器。使用卡尺，激光位移传感器测试了运动的准确性和可重复性，并在水幻影中重复进行$^{60} $ CO光束孔子测量值。卡尺和传感器的结果显示，扫描仪比$ \ pm $ 150 $μ$ m更好。与激光传感器测量位置误差的标准偏差约为30 $μ$ m，梁曲线扫描显示出最大的偏差与平均位置50 $μ$ m。使用两个不同尺寸的电离室研究了体积平均校正因子对$^{60} $ co梁profile的影响。应用校正因子后，轮廓的差异显着降低。
In radiation beam-profile measurements, an accurate positioning of the detector with high position resolution is essential. For this purpose, we built a scanning device capable of moving a detector in three dimensions using mainly parts from a commercial 3D-printer. The accuracy and repeatability of movement was tested with caliper, laser displacement sensor, and repeated $^{60}$Co beam-profile measurements in a water phantom. The results from the caliper and the sensor showed position accuracy for the scanner to be better than $\pm$150 $μ$m. The standard deviation of the error in position from laser sensor measurements was approximately 30 $μ$m and the beam profile scans showed a maximum deviation from the mean position of 50 $μ$m. The effect of volume averaging correction factors on $^{60}$Co beam-profile was investigated with two different sized ionization chambers. The differences in the profiles were reduced significantly after applying the correction factors.
