[A procedure for taking into account scattered radiation and scattered light in the densitometric determination of intravascular iodine content].

Scattered light and scattered radiation are two significant sources of error during video densitometry and lead to local under-estimation of iodine concentration. A procedure is described using digital subtraction angiography which largely eliminates both factors. The measured intravascular iodine concentration is close to the true value throughout the entire intensifier field and quantitative evaluation is independent of local factors. The reduction of the artifacts improves diagnostic certainty during visual evaluation also.