[Validity testing of time-density curves in determining the degree of arterial stenosis by DSA].
106 patients with a stenosis of the carotid arteries or the common iliac arteries were examined by digital subtraction angiography. The haemodynamic effectiveness of a stenosis was supposed to be measured by time-density curves. Evaluation of time-density curves produced by videodensitometry did not allow to judge the degree of a stenosis of the carotid or the common iliac arteries. Causative for the insufficient accuracy of the results is a patient related change of examination quality. Disturbing factors are reduced cardiac output, moving artifacts, overshadowing of the examined region by air and reduced contrast due to obesity.
Köhler
D
D
Radiologische Klinik und Poliklinik, Klinikum Rudolf Virchow, Standort Charlottenburg, Freie Universität Berlin.
Langer
M
M
Spanger
C
C
D015502:Absorptiometry, Photon; D000368:Aged; D000792:Angiography / Q000379:methods*; D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging*; D002340:Carotid Artery Diseases / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007083:Iliac Artery; D008297:Male; D008875:Middle Aged; D011856:Radiographic Image Enhancement; D013382:Subtraction Technique; D014741:Video Recording
Validitätsprüfung von Zeit-Dichte-Kurven zur Bestimmung des arteriellen Stenoseausmasses in der DSA.