EINFLUSS DER HERZFREQUENZ AUF DIE BILDQUALITÄT UND DEN NACHWEIS VON KORONARSTENOSEN MITTELS 4-ZEILEN-SPIRAL CT
- 1 January 2002
- journal article
- research article
- Published by Walter de Gruyter GmbH in Biomedizinische Technik/Biomedical Engineering
- Vol. 47 (s1b) , 782-785
- https://doi.org/10.1515/bmte.2002.47.s1b.782
Abstract
Multi-slice spiral CT (MSCT) permits the detection of coronary stenoses. We investigated the influence of the patient's heart rate (HR) during the scan on stenosis detection and the presence of motion artifacts. In 100 patients MSCT was performed and retrospectively ECG-gated cross-sectional images were reconstructed. 115 of 400 coronary arteries (29%) were unevaluable due to motion artifacts (84/115) or other reasons (31/115). In evaluable arteries, sensitivity was 91% (51/56 high grade stenoses detected), specificity was 89%. With increasing HR, the number of unevaluable arteries increased and overall sensitivity for stenosis detection decreased from 62% (HR < or = 70 bpm) to 33% (HR > 70 bpm). MSCT permits detection of coronary stenoses, but evaluability and accuracy decrease with increasing HR.Keywords
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