| NEMA NU 2-2018标准在PET/CT系统性能测试中的作用评价 |
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| 引用本文： | NEMA NU 标准在PET/CT系统性能测试中的作用评价.NEMA NU 2-2018标准在PET/CT系统性能测试中的作用评价[J].首都医学院学报,2022,43(6):840-844. |
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| 作者姓名： | NEMA NU 标准在PET/CT系统性能测试中的作用评价 |
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| 作者单位： | 解放军总医院第一医学中心核医学科,北京 100853 |
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| 基金项目： | 国家自然科学基金(11975249)。 |
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| 摘 要： | 目的 评价美国国家电器制造协会(National Electrical Manufactures Association, NEMA)最新标准(NU 2-2018)在正电子发射型计算机断层显像/电子计算机断层显像(positron emission tomography/computed tomography, PET/CT)设备性能检测中的作用。 方法 依据最新的NEMA NU 2-2018标准,检测西门子Biograph Vision PET/CT的空间分辨率、灵敏度、散射分数、计数丢失、随机符合、飞行时间分辨率、计数丢失率和随机符合校正精度、图像质量、衰减和散射校正精度及PET与CT配准精度指标。 结果 距视野中心1 cm处横向和轴向空间分辨率分别为3.75 mm和3.76 mm;在视野中心和轴向10 cm处的灵敏度分别为16.83 kcps/MBq和16.67 kcps/MBq;放射性浓度为27.37 kBq/mL时,最大等效噪声计数率为258.26 kcps,散射分数为38.58%;系统时间分辨率为209.82 ps;图像质量模型的对比度恢复系数范围为88.9%~96.2%,背景变异系数范围为2.05%~6.80%,平均肺插件残余误差为2.43%;计数丢失和随机符合校正最大误差为3.9%;距离床板末端 5 cm 和 100 cm处,在距视野中心Y轴1 cm处,PET和CT的配准精度分别为0.46 mm和1.07 mm,在距视野中心X轴20 cm处,PET和CT的配准精度分别为1.06 mm和1.45 mm,在距视野中心Y轴20 cm处PET和CT的配准精度分别为0.85 mm和1.15 mm。 结论 NEMA NU 2-2018标准检测条件更加接近临床,能更好地反映PET/CT设备的系统性能。
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| 关 键 词： | PET/CT NEMA NU 2-2018 性能检测 |
| 收稿时间： | 2022-09-30 |
Evaluation of the effect of NEMA NU 2-2018 Standards in performance test of PET/CT system |
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| Geng Yiqiang,Liu Jiajin,Wu Shina,Sun Shuwei,Zhao Dong,Song Jingbin,Sun Yabing,Wang Ruimin.Evaluation of the effect of NEMA NU 2-2018 Standards in performance test of PET/CT system[J].Journal of Capital University of Medical Sciences,2022,43(6):840-844. |
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| Authors: | Geng Yiqiang Liu Jiajin Wu Shina Sun Shuwei Zhao Dong Song Jingbin Sun Yabing Wang Ruimin |
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| Affiliation: | Department of Nuclear Medicine,the First Medical Center,Chinese PLA General Hospital,Beijing 100853, China |
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| Abstract: | Objective To explore the application of National Electrical Manufactures Association(NEMA) NU-2 2018 Standards in equipment performance testing of positron emission tomography/computed tomography (PET/CT) system. Methods According to NEMA NU 2-2018 Standards, the performance indexes were tested, including the spatial resolution, sensitivity, scatter fraction, count loss, random measurement, timing resolution, count loss rate, random measurement correction accuracy, image quality, accuracy of attenuation and scatter correction, and image co-registration accuracy of Siemens Biograph Vision 600 PET/CT. Results The transverse and axial spatial resolution were 3.75 mm and 3.76 mm at a 1 cm offset, The sensitivity was 16.8 kcps/MBq at the center of the field of view and 16.7 kcps/MBq at a 10 cm offset from the axial of the field of view. The scatter fraction was measured at 38.58% while noise equivalent count rate peaked at 258.26 kcps corresponding to 27.37 kBq/mL.The result of timing resolution is 209.82ps. The contrast recovery of the image quality phantom ranged from 88.9% to 96.2%, and the background variability ranged from 2.05% to 6.80%, the average lung residual error was 2.43%. The maximum error of counting loss and random coincidence correction was 3.9%. At 5 cm and 100 cm from the end of the bed plate,Co-registration accuracy between PET and CT were 0.46 mm and 1.07 mm at a 1 cm offset from the Y of the center field of view, 1.06 mm and 1.45 mm at a 20 cm offset from the X of the center field of view, and 0.85 mm and 1.15 mm at a 20 cm offset from the Y of the center field of view. Conclusion The conditions of NEMA NU 2-2018 standards are closer to clinical examination and can better reflect the system performance of PET/CT equipment. |
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| Keywords: | positron emission tomography/computed tomography (PET/CT) National Electrical Manufactures Association (NEMA) NU 2-2018 performance evaluation |
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