# 放射医学论文范文-《TPS视角下放射线剂量分布三维可视化的实现方法分析》

Abstract: aiming at the radiation treatment planning systems GyroRTPS need, are given a radiation dose distribution of 3 d visualization method, to help doctors check lesions from any section of radiation organization the dose distribution situation. This article first discusses the system of body data and the data of the coordinate transformation, dose calculation of interpolation pretreatment; And then, according to the VTK toolkit can handle data types of data transfer, is given based on VTK realize the dose distribution and its 3 d display and body of data fusion method shows.Test results and clinical use an example shows that the method based on the development of software system run reliably, can better help doctors in radiation treatment decisions.
Keywords: medical treatment planning system; Radiation; The dose distribution; Visualization methods

0　引言

1　二维剂量分布显示

2　体数据和剂量数据的预处理

2. 1　坐标转换

x =x1+x2(1)
y =N -y1-y2(2)

x =x1×H+x2(3)
y = (N -y1)×V-y2(4)
2. 2　插值处理
VTK所处理的DICOM图像序列中,每张切片之间都有一定的间距,如图4所示。这个距离可以从DICOM头文件的0018, 0050处读得,也可以通过从0020, 0032处读取DICOM图片的位置,用相邻两张图片位置的值相减求得。VTK在对其进行处理的时候,需要选择一种插值方法,对这些间隔进行插值处理。由于剂量值是根据每张DICOM图片计算的,并没有两张DICOM图片间隔处的剂量值,故在对剂量分布进行三维显示的时候也需要进行插值处理。由于人体CT值在同一组织中可近似认为是连续分布,故选用比较简单、计算速度比较快的线性插值处理。

P =P1+n×(P2-P1) /(s+1)(5)

3　剂量分布的三维可视化方法
3. 1　剂量的三维显示

1)结构化点集(Structured Points)。