摘要
目的:分析单光子发射型电子计算机断层扫描仪(SPECT)空间分辨性能,为制定SPECT性能检测标准时数学函数算法的选取提供参考。方法:使用SPECT通用检测模体获取固有空间分辨力、系统空间分辨力及全身平面空间分辨力3个性能参数的医学数字成像和通信(DICOM)图像,对3个性能参数随机获取10次测量数据,分别采取抛物线算法和高斯算法对数据进行拟合计算测量,并分析两种数学函数算法结果的差异。结果:所获SPECT的3个性能参数高斯算法拟合相关系数平方(R^2)值为0.974～0.999;SPECT固有空间分辨力、系统空间分辨力和全身平面空间分辨力的检验P值分别为0.0001、0.057和0.075。结论:对于SPECT空间分辨性能的分析可采用抛物线法进行分析,对于系统空间分辨力应该采集256×256矩阵的数据。
Objective: To analyze the performance of single-photon emission computed tomography(SPECT) spatial resolution so as to provide reference for the selection of mathematical function algorithms in formulating test standard of SPECT performance. Methods: Using the general test phantom to acquire the Digital Imaging and Communications in Medicine image(DICOM) of three performance parameters included intrinsic spatial resolution power, system spatial resolution power and plane spatial resolution power of whole body. And 10 measured data of 3 performance parameters were randomly obtained, and then parabola algorithm and Gaussian algorithm were adopted to implement fitting calculation and measurement for these data, respectively, and the difference of the two algorithms was further analyzed. Results: The range of fitting determination coefficient(R^2) of Gaussian algorithm of three performance parameters that obtained from SPECT was from 0.974 to 0.999. And the test P values of intrinsic spatial resolution power, system spatial resolution power and plane spatial resolution power of whole body were 0.0001, 0.057 and 0.075, respectively. Conclusion: The analysis of spatial resolution performance of SPECT may adopt parabolic algorithm. And the system spatial resolution power should gather the data of 256×256 matrix.
出处
《中国医学装备》
2019年第1期42-45,共4页
China Medical Equipment
