Ratib O, Henze E, Hoffman E, Phelps M E, Schelbert H R
J Nucl Med. 1982 Jan;23(1):34-41.
To determine the usefulness of the rotating slant-hole (RSH) collimator, a new imaging device for tomographic myocardial imaging, we evaluated its performance in phantom studies. Perfusion defects of variable size, location, and tracer concentration were simulated and imaging was performed with a conventional parallel-hole collimator and the RSH collimator. Planar and depth resolutions assessed with a line source compared favorably with those reported previously for the seven-pinhole collimator. The results also showed RSH tomography to be more sensitive than planar imaging in detecting simulated myocardial defects but indicated some limitations, especially the occurrence of artifactual defects that may reduce the specificity of the imaging device for the detection of perfusion abnormalities.
为了确定旋转斜孔（RSH）准直器（一种用于断层心肌成像的新型成像设备）的实用性，我们在模型研究中评估了其性能。模拟了大小、位置和示踪剂浓度各异的灌注缺损，并使用传统平行孔准直器和RSH准直器进行成像。用线源评估的平面分辨率和深度分辨率与先前报道的七针孔准直器的分辨率相比具有优势。结果还表明，RSH断层扫描在检测模拟心肌缺损方面比平面成像更敏感，但也显示出一些局限性，尤其是会出现伪影缺损，这可能会降低成像设备检测灌注异常的特异性。
