Doi K, Loo L N, Rossmann K
Med Phys. 1977 Sep-Oct;4(5):400-3. doi: 10.1118/1.594325.
The computer-simulation technique for imaging of vessels in angiography is being recognized as a useful tool for the study of the effect of physical parameters on the vessel image. We have examined the validity of this technique by comparing the computed image distribution directly with experimental results. The imput x-ray pattern of a blood vessel phantom, the LSF of the focal spot, and the LSF of a screen-film system were measured. From the data obtained, the final image distributions of the phantom were computed and compared with the experimentally determined distributions. A high-precision device for the alignment and positioning of the vessel phantom was employed in the experiments. Results indicate that computer simulation can correctly predict the image distribution of the blood vessel phantom.
血管造影术中用于血管成像的计算机模拟技术正被视为研究物理参数对血管图像影响的有用工具。我们通过将计算出的图像分布直接与实验结果进行比较，检验了该技术的有效性。测量了血管模型的输入X射线图案、焦点的线扩散函数以及屏-片系统的线扩散函数。根据获得的数据，计算出模型的最终图像分布，并与实验确定的分布进行比较。实验中采用了一种用于血管模型对准和定位的高精度装置。结果表明，计算机模拟能够正确预测血管模型的图像分布。
