[心率对多层螺旋CT冠状动脉狭窄图像质量及检测的影响]

[Influence of heart rate on image quality and detection of coronary stenoses with multislice spiral CT].

作者信息

Mennicke M, Giesler T, Ropers D, Baum U, Ulzheimer S, Wenkel E, Pohle K, Daniel W G, Achenbach S

机构信息

Medizinische Klinik II, Universität Erlangen-Nürnberg, Deutschland.

出版信息

Biomed Tech (Berl). 2002;47 Suppl 1 Pt 2:782-5. doi: 10.1515/bmte.2002.47.s1b.782.

DOI:10.1515/bmte.2002.47.s1b.782

PMID:12465302

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.

摘要

多层螺旋CT（MSCT）能够检测冠状动脉狭窄。我们研究了扫描过程中患者心率（HR）对狭窄检测及运动伪影出现的影响。对100例患者进行了MSCT检查，并回顾性重建了心电图门控横断面图像。400条冠状动脉中有115条（29%）因运动伪影（84/115）或其他原因（31/115）无法评估。在可评估的动脉中，敏感性为91%（检测到51/56处高度狭窄），特异性为89%。随着心率增加，无法评估的动脉数量增加，狭窄检测的总体敏感性从62%（心率≤70次/分钟）降至33%（心率>70次/分钟）。MSCT能够检测冠状动脉狭窄，但随着心率增加，可评估性和准确性会降低。