NEMA NU 2-2000 performance measurements on an ADAC MCD camera
NEMA NU 2-2000 performance measurements on an ADAC MCD camera
复制标题
ADAC MCD 相机上的 NEMA NU 2-2000 性能测量
DOI：
--
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
T. Ruth
中科院分区：
文献类型：
--
作者：
V. Sossi;B. Pointon;C. Boudoux;P. Cohen;K. Hudkins;S. Jivan;K. Nitzek;J. deRosario;C. Stevens;T. Ruth
已在ADAC MCD双头摄像机上执行了临床导向NEMA-NU 2性能标准。在1cm半径处，测量到横向分辨率FWHM（FWTM）为5.2轴向为5.0 mm（10.6）mm，在10 cm半径处，横向径向分辨率为4.7（7.4）mm，横切线为8.5轴向分辨率为14.0（41.1）mm，浓度为4.3kBq/ml时，峰值真计数率为4365计数/秒。在2.9 kBq/ml时，峰值噪声等效计数率（NECR）为1617计数/秒。系统散射分数为48%。在NECR峰处观察到的最大相对计数率误差为-42%。中心的灵敏度为1014 cts/sec/MBq，偏移10 cm时为867 cts/sec/MBq。对比度为8：1（4：1）时，热球的对比度范围为18.5（11.6）%至11.6（7.9）%。对于冷球体，其范围为41%至25%，总体背景变化为7%。散射和衰减校正的残余误差约为50%。所有测量均在810 mm的最大允许晶体-晶体距离下进行。
The clinically oriented NEMA-NU2 performance standards have been performed on an ADAC MCD dual head camera. At 1 cm radius the transverse resolution FWHM (FWTM) was measured to be 5.2 (10.0) mm and the axial was 5.0 (10.6) mm. At 10 cm radius the transverse radial resolution was 4.7 (7.4) mm and the transverse tangential was 8.5 (20.9) mm. The axial resolution was 14.0 (41.1) mm. The peak true count rate was 4365 counts/sec at a concentration of 4.3 kBq/ml. The peak noise equivalent count rate (NECR) was 1617 count/sec at 2.9 kBq/ml. The system scatter fraction was 48%. The maximum relative count rate error observed at the NECR peak was -42%. The sensitivity was 1014 cts/sec/MBq in the centre and 867 cts/sec/MBq at an offset of 10 cm. The contrast for the hot spheres ranged from 18.5 (11.6)% to 11.6 (7.9)% for the contrast ratio of 8:1 (4:1). For the cold spheres it ranged from 41% to 25% with an overall background variability of 7%. The residual error in scatter and attenuation correction was approximately 50%. All measurements were performed at the maximum allowed crystal-to-crystal distance of 810 mm.
DOI：
--
发表时间：
1987-11
期刊：
Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子：
--
作者：
M. Daube-Witherspoon;G. Muehllehner
通讯作者：
M. Daube-Witherspoon;G. Muehllehner