Philips-Precedence双探头单光子发射计算机断层成像仪的五年质量控制监测  

Long-term Quality Control of Philips-Precedence Dual-head Single Photon Emission Computed Tomography for Five Years

作　　者：沈国华[1] 周绿漪[1] 贾志云[1] 杨小川[1] 邓候富[1] 

机构地区：[1]四川大学华西医院核医学科,成都610041

出　　处：《华西医学》2015年第10期1906-1909,共4页West China Medical Journal

基　　金：国家自然科学基金(81171456;81271532)~~

摘　　要：目的为提高医疗质量和安全,监测Philips-Precedence双探头单光子发射计算机断层成像仪(SPECT)的性能状态。方法根据美国电气制造商协会标准和厂家设计条件,经自制点源、旋转中心模型,分别对仪器的能峰、固有均匀性、旋转中心这3个指标进行常规测试,质量控制(质控)监测频率为2次/周(能峰、固有均匀性)或1次/周(旋转中心)。对2008年-2012年的Philips-Precedence双探头SPECT进行质控监测。结果 2008年-2012年,探头1的能峰5年平均值为(139.23±0.32)ke V,探头2的能峰5年平均值为(138.97±0.45)ke V,均在参考值范围内[(140±3)ke V]。并且双探头的旋转中心数据均在正常范围内且稳定性很好。固有均匀性质控数据分析显示,探头1在2009年、2010年和2011年的中心视野(CFOV)和有效视野(UFOV)与2008年比较差异无统计学意义(P>0.05),只有2012年的CFOV和UFOV与2008年相比差异有统计学意义(P<0.05);探头2在2009年、2011年与2008年相比差异无统计学意义(P>0.05),而在2010年、2012年与2008年相比差异有统计学意义(P<0.05)。结论随着使用时间延长,SPECT的均匀性会逐渐变差。但采用定期的质控和护养措施,可使SPECT的性能参数保持稳定,提高设备使用率。Objective To improve health care quality and safety by monitoring the performance of PhilipsPrecedence Dual-head single photon emission computed tomography（SPECT）. Methods With our own homemade point source and the center of rotation model, in accordance with NEMA standards and manufacturers＇ design conditions, these three indicators including energy peak position of the instrument, intrinsic uniformity and center of rotation were routinely tested between 2008 and 2012 for the Philips-Precedence Dual-head SPECT in our hospital. In addition, the quality control was performed twice a week, and every year the total number of quality control was basically the same. We calculated the results by the weighted average method. Results The 5-year average energy peaks of detector 1 and 2 were（139.23±0.32） and（138.97±0.45） ke V, respectively, and they were both within the range of reference values [（140±3） ke V]. In addition, the results of center of rotation were also in the normal range, and kept stable. Based on the analysis of quality-control data, for detector 1, compared with the data of 2008, there was no significant difference for central field of vision（CFOV） and useful field of vision（UFOV） in these three years from 2009 to 2011（P〈0.05）. The difference was only significant between data of 2008 and that of 2012（P〈0.05）. For detector 2, compared with the data of 2008, there was no significant difference for CFOV and UFOV in 2009 and 2011（P〉0.05）, while there was significant different in 2010 and 2012（P〈0.05）. Conclusions The uniformity of SPECT will gradually deteriorate with prolonged use. However, regular quality control and maintaining can keep the function stabilization, and enhance the availability rate.

关 键 词：质量控制 能峰 均匀性 旋转中心 

分 类 号：R197.39[医药卫生—卫生事业管理]