Laks M M, Garner D, Beazell J, Piscatelli J
Am J Physiol. 1977 Apr;232(4):H434-6. doi: 10.1152/ajpheart.1977.232.4.H434.
Previous methods of internal calibration for cineangiography have made use of reference objects such as catheters or wires of known length or diameter. Such devices have either insufficient X-ray resolution, or require a specific orientation within the ventricle which is difficult to confirm. External calibration methods, while eliminating these errors, can only estimate actual position of the left ventricle. The use of a Swan-Ganz balloon catheter as a calibration object diminishes these problems. When positioned within the left ventrical and filled with a radiopaque medium, the balloon is of sufficient size and density to avoid errors induced by previously employed objects. The inflated balloon geometry is simple and reproducible. The use of this internal calibration catheter markedly diminishes major sources of errors in the determination of ventriculograms for both dogs and humans.
以往用于心血管造影术内部校准的方法使用了诸如已知长度或直径的导管或导丝等参考物体。这类装置要么X射线分辨率不足，要么需要在心室内处于特定方位，而这很难确定。外部校准方法虽然消除了这些误差，但只能估计左心室的实际位置。使用Swan-Ganz球囊导管作为校准物体可减少这些问题。当置于左心室内并充满不透射线的介质时，球囊具有足够的尺寸和密度，可避免先前使用的物体所引起的误差。充气后的球囊形状简单且可重复。使用这种内部校准导管可显著减少犬类和人类心室造影测定中的主要误差来源。
