Cipriano-Urbano I E, Garnica-Garza H M
Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional Unidad Monterrey, Vía del Conocimiento 201 Parque PIIT, Apodaca Nuevo León México, 66600, Mexico.
Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional Unidad Monterrey, Vía del Conocimiento 201 Parque PIIT, Apodaca Nuevo León México, 66600, Mexico.
Appl Radiat Isot. 2017 Apr;122:193-201. doi: 10.1016/j.apradiso.2016.12.055. Epub 2017 Jan 18.
In this paper, we propose the use of a pixelated transmission chamber, placed between the patient and the imaging detector, to measure the scatter component of a radiation beam impinging on said imaging detector. Using Monte Carlo simulation, a three-parameter model for the propagation of the scatter component in the transmitted beam is first developed. The use of the transmission chamber to determine the model parameters is then modeled, again using Monte Carlo simulation, and the feasibility of this approach is determined. The amount of radiation backscattered from the imaging detector into the transmission chamber was also calculated, for several separation distances between the two. It is shown that at a separation of 10cm, the amount of backscatter radiation is independent of the imaged object and that therefore it can be determined as part of a calibration procedure for the transmission chamber.
在本文中，我们提议在患者与成像探测器之间放置一个像素化传输腔，以测量入射到所述成像探测器上的辐射束的散射分量。利用蒙特卡洛模拟，首先建立了传输光束中散射分量传播的三参数模型。然后，再次使用蒙特卡洛模拟对利用传输腔确定模型参数的过程进行建模，并确定该方法的可行性。还针对两者之间的几个分离距离，计算了从成像探测器反向散射到传输腔中的辐射量。结果表明，在10厘米的分离距离下，反向散射辐射量与成像对象无关，因此可以将其确定为传输腔校准程序的一部分。
