Honda N, Machida K, Takishima T, Mamiya T, Takahashi T, Kamano T, Tamaki S, Ban R
Department of Radiology, Saitama Medical Center, Saitama Medical School, Japan.
Clin Nucl Med. 1991 Feb;16(2):87-91. doi: 10.1097/00003072-199102000-00004.
A method of three-dimensional cinematic display (3D cine) of cardiac blood pool tomography is described. ECG-gated transaxial blood pool imaging was obtained from a set of projection images that were collected from 32 images with 10 ECG-gated images per projection during a 180 degrees arc of a rotating gamma camera. A surface contour of the blood pool was determined by a set of isocount lines (40-55% of the maximum pixel counts) of the transaxial images. 3D cine was made by a depth-shading method, in which brightness of a given point on the contour was set proportional to the distance between the viewing plane and the point and to the incident angle formed by the viewing line and the surface of the point. In 15 patients, 3D cine showed hypokinesia, akinesia, dyskinesia, ventricular aneurysm, and opposite motions of the atria and ventricles. Diagnoses of left ventricular motion by 3D cine agreed well with those by echocardiography and contrast left ventriculography.
本文描述了一种心脏血池断层扫描的三维电影显示（3D电影）方法。通过旋转γ相机在180度弧线上采集一组投影图像获得心电图门控的经轴血池成像，每个投影有10个心电图门控图像，共32个图像。通过经轴图像的一组等计数线（最大像素计数的40 - 55%）确定血池的表面轮廓。3D电影通过深度阴影法制作，其中轮廓上给定点的亮度设置为与观察平面和该点之间的距离以及观察线与该点表面形成的入射角成比例。在15例患者中，3D电影显示了运动减退、运动不能、运动障碍、室壁瘤以及心房和心室的相反运动。3D电影对左心室运动的诊断与超声心动图和对比左心室造影的诊断结果吻合良好。
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