基于曲线拟合法与算术平均法计算双探头SPECT旋转中心漂移值的比较

目的 研究基于曲线拟合法与算术平均法计算单光子发射计算机断层成像（SPECT）设备探头旋转中心漂移值的差异性。方法 选取3个厂家的9台SPECT设备，每台设备都分别用曲线拟合法与算术平均法计算探头旋转中心漂移值，比较两种计算方法计算结果的差异性。同时将探头按照厂家分组，根据各厂家规定的合格值，将两种计算方法的结果与厂家自带软件计算的结果进行比较。结果 一共13个探头的13组数据中，两种计算方法计算结果之间数据差异无统计学意义（P>0.05），两种计算方法计算结果分别与厂家计算结果之间比较，数据差异均无统计学意义（P>0.05）。两种计算方法计算结果分别与厂家计算结果相比，通过性均一致。结论 两种方法均能为旋转中心漂移的检测提供参考。

Comparison of double probe SPECT rotation center drift values evaluated by the curve fitting method and arithmetic mean method

Objective To study the difference of the rotation center drift values of single-photon emission computed tomography (SPECT) equipment evaluated by curve fitting method and arithmetic average method. Methods Nine SPECT devices from 3 manufacturers were selected. Use both the curve fitting method and the arithmetic average methodto evaluate the drift values of the probe rotation centerfor each device, and compare their difference. Furthermore, the probes were were grouped according to the manufacturer, and the two evaluated results were compared with the results calculated with the manufacturer's own software. Results Among the 13 groups of 13 probes, no statistically significant difference was found between the results by using the two evaluation methods (P>0.05), and the difference between the evaluated values and the manufacturer's values were also not significant (P>0.05). The results of the two evaluation methods were consistent with the manufacturer's valuesresults. Conclusions Both methods can provide reference for the detection of rotational center drift.