Bruschke A V, Padmos I, Buis B, Van Benthem A
Department of Cardiology, Academic Hospital, Leiden, The Netherlands.
J Am Coll Cardiol. 1990 Mar 15;15(4):784-9. doi: 10.1016/0735-1097(90)90274-s.
The purpose of this study was to determine the accuracy of imaging small coronary arteries with current radiographic equipment. Phantom assessments were performed using a phantom that comprises a large array of circular objects of varying diameter and contrast density. More objects could be identified in the moving cinearteriogram than in single cine frames. Using the largest object as the calibration standard, diameters less than 1 mm were markedly overestimated. A simple morphometric method showed that arteriographic visualization of small vessels was better by digital processing than by cine recording. However, there was no statistically significant difference in the average size of the smallest identifiable vessel by either method (0.5 versus 0.51 mm). After correcting for overestimation and the inaccurate imaging of the smallest detectable vessels, the practical arteriographic threshold is approximately 0.5 mm. Parametric imaging holds promise, but its significance for evaluating small vessel disease has yet to be determined.
本研究的目的是确定使用当前的放射成像设备对小冠状动脉进行成像的准确性。使用包含大量不同直径和对比密度的圆形物体的模型进行模型评估。在动态动脉造影片中比在单帧电影图像中能识别出更多的物体。以最大的物体作为校准标准，直径小于1毫米的血管被明显高估。一种简单的形态测量方法表明，通过数字处理对小血管进行动脉造影可视化比电影记录更好。然而，两种方法可识别的最小血管的平均大小没有统计学上的显著差异（分别为0.5毫米和0.51毫米）。在纠正了高估和最小可检测血管成像不准确的问题后，实际动脉造影阈值约为0.5毫米。参数成像有前景，但它对评估小血管疾病的意义尚未确定。
