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[Resolution capacity in intra-arterial digital subtraction angiography of the A. carotis].

Intraarterial digital subtraction angiography of the intracranial vascular system is increasingly one of the more important advances in neuroradiology. The paramount disadvantage is less spatial resolution. Based on experimental and theoretical studies recommendations are given to reach a optimum of spatial resolution: Selective intraarterial application of undiluted contrast medium (300 mgJ/ml); volume: 3 ml in a. carotis comm.; flow: 5 ml/sec.