使用 NEMA NU 2-2007 标准对 PET/CT Discovery-600 进行性能测量。
Performance measurements for the PET/CT Discovery-600 using NEMA NU 2-2007 standards.
机构信息
Medical Physics Unit, San Gerardo Hospital, Via Pergolesi 33, 20052 Monza, Italy.
出版信息
Med Phys. 2011 Feb;38(2):968-74. doi: 10.1118/1.3544655.
PURPOSE
The aim of this study was to assess the performance measurements of the new PET/CT system Discovery-600 (D-600, GEMS, Milwaukee, WI).
METHODS
Performance measures were obtained with the National Electrical Manufacturers Association (NEMA) NU 2-2007 procedures.
RESULTS
The transverse (axial) spatial resolution FWHMs were 4.9 (5.6) mm and 5.6 (6.4) mm at 1 and 10 cm off axis, respectively. The sensitivity (average at 0 and 10 cm) was 9.6 cps/kBq. The scatter fraction was 36.6% (low energy threshold: 425 keV). The NEC peak rate (k=1) was 75.2 kcps at 12.9 kBq/cc. The hot contrasts for 10, 13, 17, and 22 mm spheres were 41%, 51%, 62%, and 73% and the cold contrasts for 28 and 37 mm spheres were 68% and 72%.
CONCLUSIONS
The Discovery-600 has good performance for the NEMA NU 2-2007 parameters, particularly in improved sensitivity compared to the scanners of the same Discovery family, D-ST and D-STE.
目的
本研究旨在评估新的 PET/CT 系统 Discovery-600（D-600，GEMS，密尔沃基，威斯康星州）的性能测量值。
方法
采用美国电器制造商协会（NEMA）NU 2-2007 程序获得性能测量值。
结果
横向（轴向）空间分辨率 FWHM 值分别为 1 和 10 cm 离轴时的 4.9（5.6）mm 和 5.6（6.4）mm。灵敏度（0 和 10 cm 时的平均值）为 9.6 cps/kBq。散射分数为 36.6%（低能阈值：425 keV）。NEC 峰值率（k=1）在 12.9 kBq/cc 时为 75.2 kcps。10、13、17 和 22 mm 球体的热点对比度分别为 41%、51%、62%和 73%，28 和 37 mm 球体的冷点对比度分别为 68%和 72%。
结论
Discovery-600 在 NEMA NU 2-2007 参数方面具有良好的性能，特别是与同一 Discovery 系列的扫描仪 D-ST 和 D-STE 相比，灵敏度得到了提高。
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