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目的 探讨153 Gd非均匀衰减校正系统对心肌模型及心肌断层图像的校正效果。方法应用ADACVertexPlus双探头SPECT仪及153 Gd非均匀衰减校正系统。心肌断层模型内分别充满99TcmO-4370MBq和2 0 1Tl 37MBq。心肌显像患者共 86例 ,其中男 6 4例 ,女 2 2例 ,分别采用和不采用153 Gd非均匀衰减校正。结果 心肌断层模型153 Gd非均匀衰减校正图像与未校正图像的比较分别用目测法和比值法 ,结果表明 :校正图像质量比未校正图像好 ,更能反映真实情况。99Tcm 甲氧基异丁基异腈 (MIBI)的图像校正效果好于2 0 1Tl的图像。临床心肌显像图用目测法比较 :99Tcm MIBI有差异的占 6 0 2 % ,2 0 1Tl有差异的占 5 1.4%。结论 153 Gd非均匀衰减校正系统对心肌图像的校正效果非常明显 ;99Tcm MIBI的分辨率好于2 0 1Tl。
Objective To investigate the effect of 153 Gd nonuniform attenuation correction system on myocardial model and myocardial tomography. Methods ADACVertexPlus dual probe SPECT instrument and 153 Gd non-uniform attenuation correction system. Myocardial infarction model were filled with 99TcmO-4370MBq and 210L of 37MBq. A total of 86 patients with myocardial imaging, including 64 males and 22 females, with and without 153 Gd non-uniform attenuation correction. Results Compared with uncorrected images of 153 Gd non-uniform attenuation-corrected myocardial ischemia model, the visual and radiometric methods were used respectively. The results showed that the corrected image quality was better than the uncorrected ones and reflected the real situation better. 99Tcm methoxy isobutyl isonitrile (MIBI) image correction better than 210lT image. Clinical myocardial imaging chart compared with the visual method: 99Tcm MIBI have a difference of 62%, 20lTl have a difference of 5 1.4%. Conclusion The 153 Gd non-uniform attenuation correction system is very effective in correcting myocardial images; the resolution of 99Tcm MIBI is better than 201 Tl.