Activity Quantitation In SPECT: A Comparison Of Three Attenuation Correction Methods In Combination With Pre-reconstruction Restoration Filtering
Activity Quantitation In SPECT: A Comparison Of Three Attenuation Correction Methods In Combination With Pre-reconstruction Restoration Filtering
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SPECT 中的活性定量：三种衰减校正方法与预重建恢复过滤相结合的比较
DOI：
10.1109/nssmic.1990.693527
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
B. C. Penney
中科院分区：
文献类型：
--
作者：
Matt A. King;S. Glick;B. C. Penney
对重建前Metz滤波和算术平均重建、张氏重建后或贝里尼本征衰减校正方法进行了活度定量研究。用不同直径的TC-99M填充小球，用椭圆形截面体模进行了活度估算。空气敏感度百分比被用来评估衰减校正的准确性，所述空气敏感度百分比被计算为模体中的源的每单位活动的ROI(感兴趣区域)的计数率除以点源在空气时间中的每单位活动的计数率。已经确定，明确包括散射辐射积累的传输模型比通过用平均散射分数调整计数来校正散射更准确地量化均匀桶中的活度。使用二维重建前Metz滤波结合Bellini固有或张氏重建后衰减校正，可获得与位置关系最小且最接近100%的灵敏度百分比。>；
A study of activity quantitation with pre-reconstruction Metz filtering and the use of arithmetic mean pre-reconstruction, Chang's post-reconstruction, or Bellini's intrinsic attenuation correction was conducted. Tc-99m-Filled spheres of various diameters were used to study activity estimation with an elliptical cross-section phantom. The percent of air sensitivity, which is calculated as the count rate for an ROI (region of interest) per unit activity for a source in the phantom divided by the count rate per unit activity for a point source in air times 100%, was used to assess the accuracy of attenuation correction. It was determined that a transmission model which explicitly included the buildup of scattered radiation yielded more accurate quantitation of activity in a uniform tub than correcting for scatter by scaling the counts with an average scatter fraction. The use of 2-D pre-reconstruction Metz filteringcombined with Bellini's intrinsic or Chang's post-reconstruction attenuation correction resulted in percent sensitivities which were the least position dependent and closest to 100%. >
使用伽马相机确定的充满水的模型中的 Tc-99m 衰减系数。
影响因子：
3.8
作者：
Harris,CC;Greer,KL;Jaszczak,RJ;FloydJr,CE;Fearnow,EC;Coleman,RE
通讯作者：
Coleman,RE
SPECT 中的活性定量：重建前 Metz 过滤和散射降解因子使用的研究。
影响因子：
3.8
作者：
King,MA;Coleman,M;Penney,BC;Glick,SJ
通讯作者：
Glick,SJ