Dale S, Bone D
Department of Medical Engineering, Karolinska Institute, Huddinge, Sweden.
J Nucl Med. 1990 Oct;31(10):1682-8.
Tomographic imaging of the myocardium was performed using a gamma camera and a 30-degree rotating slant-hole collimator to register 64 projections from a restricted-view angle. Section images were reconstructed with a two-dimensional filtered backprojection technique. Performance in terms of resolution, effects of misalignment, and three-dimensional activity distribution was evaluated in phantom studies. In a limited clinical study, ten consecutive patients were imaged both with single-photon emission computed tomography (SPECT) and the method described. In the new method, the camera was orientated in the 30 degrees left anterior oblique position with 15 degrees cranial tilt. Due to the short distance from the myocardium to the camera, resolution within reconstructed section images was high, the noise level was comparatively low, and the mean activity level in the posterior wall was significantly higher (p less than 0.005) than in SPECT.
使用γ相机和30度旋转斜孔准直器对心肌进行断层成像，以从受限视角记录64个投影。采用二维滤波反投影技术重建断层图像。通过模型研究评估了分辨率、失准影响和三维活性分布方面的性能。在一项有限的临床研究中，连续10名患者分别接受了单光子发射计算机断层扫描（SPECT）和上述方法的成像。在新方法中，相机位于左前斜30度且头倾15度的位置。由于心肌与相机之间的距离较短，重建断层图像内的分辨率较高，噪声水平相对较低，且后壁的平均活性水平显著高于SPECT（p<0.005）。
