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...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。展开更多
Objective: To compare the glaucoma hemifield test (ght) results of the central 30-2 threshold test vs. central 30-2 sita standard test in glaucoma suspect patients without expierence in automated perimetry. Methods: U...Objective: To compare the glaucoma hemifield test (ght) results of the central 30-2 threshold test vs. central 30-2 sita standard test in glaucoma suspect patients without expierence in automated perimetry. Methods: Using the humphrey visual field analyzer model 745, 100 subjects were tested with central 30-2 threshold test (group a) and 100 subjects were tested with cen-展开更多
文摘目的应用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。
文摘Objective: To compare the glaucoma hemifield test (ght) results of the central 30-2 threshold test vs. central 30-2 sita standard test in glaucoma suspect patients without expierence in automated perimetry. Methods: Using the humphrey visual field analyzer model 745, 100 subjects were tested with central 30-2 threshold test (group a) and 100 subjects were tested with cen-