An investigation into the use of sensitivity-encoded techniques to increase temporal resolution in dynamic contrast-enhanced breast imaging

被引:24
作者
Larkman, DJ [1 ]
deSouza, NM [1 ]
Bydder, M [1 ]
Hajnal, JV [1 ]
机构
[1] Univ London Imperial Coll Sci Technol & Med, Robert Steiner MRI Unit, London W12 0HS, England
关键词
breast; contrast; SENSE; gadolinium; parallel imaging;
D O I
10.1002/jmri.1190
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Gadolinium-enhanced dynamic magnetic resonance (MR) imaging is playing an increasingly important diagnostic role in patients with breast cancer. Because of the multi-focal nature of the disease, it is mandatory to cover all of both breasts, not only in the initial scan, but also at subsequent follow-up. This requires volume acquisitions with a temporal resolution limited to 60-80 seconds, which is insufficient to clearly discriminate malignant from benign rates of contrast uptake. In this work, we performed sensitivity-encoded imaging using a commercially available four-channel breast coil (MRI Devices Corporation) on a commercial 0.5-T scanner with moderate gradient performance to give increased temporal resolution in these dynamic contrast-enhanced scans. A two-fold increase in temporal resolution was readily achievable with this coil. Image reconstruction was robust and image quality was assessed qualitatively to be good. We also investigated higher speed-up factors using two directions of sensitivity-encoded reduction and discussed some of the potential artifacts associated with such imaging. J. Magn. Reson. Imaging 2001;14:329-335. (C) 2001 Wiley-Liss, Inc.
引用
收藏
页码:329 / 335
页数:7
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