用于3D磁共振冠状动脉造影的实时自适应导航器校正的优化

Optimization of realtime adaptive navigator correction for 3D magnetic resonance coronary angiography.

作者信息

Nagel E, Bornstedt A, Schnackenburg B, Hug J, Oswald H, Fleck E

机构信息

Cardiology/Internal Medicine, Charité, Campus Virchow Klinikum, Humboldt University and German Heart Institute, Berlin, Germany.

出版信息

Magn Reson Med. 1999 Aug;42(2):408-11. doi: 10.1002/(sici)1522-2594(199908)42:2<408::aid-mrm24>3.0.co;2-u.

DOI:10.1002/(sici)1522-2594(199908)42:2<408::aid-mrm24>3.0.co;2-u

PMID:10440967

Abstract

Breathing motion artifacts reduce the quality of MR coronary artery images. Real-time adaptive navigator correction with different correction factors (0%, 30%, 60%, 80% of diaphragmatic displacement) was used to correct for respiratory motion in 3D coronary artery imaging. Significant improvements of image quality were achieved by adaptive motion correction in comparison with conventional navigator gating. A close correlation between the correction factor, which yielded optimal image quality, and cardiac displacement relative to diaphragmatic displacement was found. The quality of coronary artery imaging can be improved using real-time adaptive navigator correction. Correction factors have to be adjusted for each segment of the coronary arteries and for each patient. Magn Reson Med 42:408-411, 1999.

摘要

呼吸运动伪影会降低磁共振冠状动脉图像的质量。在三维冠状动脉成像中，使用具有不同校正因子（膈肌位移的0%、30%、60%、80%）的实时自适应导航校正来校正呼吸运动。与传统的导航门控相比，自适应运动校正显著提高了图像质量。发现产生最佳图像质量的校正因子与相对于膈肌位移的心脏位移之间存在密切相关性。使用实时自适应导航校正可以提高冠状动脉成像的质量。必须针对冠状动脉的每个节段和每个患者调整校正因子。《磁共振医学》42:408 - 411，1999年。