Determination of renal circulation by means of angiocinedensitometry

This new X-ray method is based on the densitometric measurement of the speeds and the flow of injected contrast media during an angiographic examination of the vessels and the parenchyma of the kidney. Pairs of highly sensitive photoconductive cells and a Wheatstone bridge circuit are used. Minimal doses of contrast media can be detected before vascular reaction influences the renal circulation. The measurement of various parameters allows the simultaneous hemodynamic analysis of kidney function and of factors related to the morphological substrate.