摘要
目的应用NEMA NU 2-2001标准测试国内部分PET/CT的性能指标。方法按照NEMA NU 2-2001标准的测试模型和方法,测试PET空间分辨率、散射系数、计数丢失和随机符合性能、灵敏度以及成像质量、衰减和散射校正精度性能指标,探讨PET/CT融合精度测试方法,并对LSO晶体PET/CT的本底计数率特性作初步测试。结果各测试指标均在厂家标称值范围内。结论采用标准的NEMA测试模型是PET性能测试的重要环节,其次是要严格控制测试模型的放射性活度,NEMA NU 2-2001标准中使用的模型或方法对于大多数使用者是可行的,可用于PET/CT安装前后的验收测试,部分测试可用于质量控制。
Objective To test the performances of PET/CT scanner in China with NEMA NU 2-2001 Methods Using the test phantoms and methods according to NEMA NU 2-2001,the spatial resolution; scatter fraction, count losses, randoms measurement, sensitivity; image quality, accuracy of attenuation and scatter corrections were measured. The measures of image fusion precision was discussed and premilary measurement to background count of LSO crystal was done. Results The results of measurment were all in the range of factory standard. Conclusion Using the standard NEMA phantoms and controlling the lowest activity level of test source （the count rate of test source） are critical to test the PET/CT performance..The NEMA NU 2-2001 is available to acceptance test of PET/CT scanner in pre- and post-installation periods, and a part of test can be used in the quality control.
出处
《中国医疗设备》
2009年第8期28-32,共5页
China Medical Devices
