Freyschmidt J, Rittmeyer K
Rofo. 1975 Oct;123(4):301-7. doi: 10.1055/s-0029-1230201.
Experiments with models and post mortem angiograms have shown that the supposed advantages of angiotomography, such as determination of the depth of vessels, cannot be achieved with accuracy if there is repeated change in direction of the vessels. Blurring of superimposed vessels depends not only on their contrast and calibre, but also on their alignment in relationship to the direction of blurring. Vessels running in the direction of blurring produce undesirable shadows through a considerable depth, whereas vessels running across the direction of blurring are rapidly blurred if not in the selected plane. The demonstration of vessels running at right angles to the direction of blurring may at times be very difficult with simultaneous tomography. The clinical significance of this finding is pointed out.
模型实验和尸检血管造影显示，如果血管方向反复变化，血管造影断层摄影术所谓的优势，如确定血管深度，就无法准确实现。重叠血管的模糊不仅取决于它们的对比度和管径，还取决于它们相对于模糊方向的排列。沿模糊方向走行的血管在相当深的深度产生不良阴影，而与模糊方向交叉走行的血管如果不在选定平面内则会迅速模糊。在同时进行断层摄影时，显示与模糊方向成直角走行的血管有时可能非常困难。指出了这一发现的临床意义。
