Reeder Scott B, Markl Michael, Yu Huanzhou, Hellinger Jeffrey C, Herfkens Robert J, Pelc Norbert J
Department of Radiology, Stanford University Medical Center, Stanford, California, USA.
J Magn Reson Imaging. 2005 Jul;22(1):44-52. doi: 10.1002/jmri.20327.
To decompose multicoil CINE steady-state free precession (SSFP) cardiac images acquired at short echo time (TE) increments into separate water and fat images, using an iterative least-squares "Dixon" (IDEAL) method.
Multicoil CINE IDEAL-SSFP cardiac imaging was performed in three volunteers and 15 patients at 1.5 T.
Measurements of signal-to-noise ratio (SNR) matched theoretical expectations and were used to optimize acquisition parameters. TE increments of 0.9-1.0 msec permitted the use of repetition times (TRs) of 5 msec or less, and provided good SNR performance of the water-fat decomposition, while maintaining good image quality with a minimum of banding artifacts. Images from all studies were evaluated for fat separation and image quality by two experienced radiologists. Uniform fat separation and diagnostic image quality was achieved in all images from all studies. Examples from volunteers and patients are shown.
Multicoil IDEAL-SSFP imaging can produce high quality CINE cardiac images with uniform water-fat separation, insensitive to Bo inhomogeneities. This approach provides a new method for reliable fat-suppression in cardiac imaging.
使用迭代最小二乘“狄克逊”（IDEAL）方法，将在短回波时间（TE）增量下采集的多线圈电影稳态自由进动（SSFP）心脏图像分解为单独的水和脂肪图像。
在1.5 T场强下，对3名志愿者和15名患者进行了多线圈电影IDEAL-SSFP心脏成像。
信噪比（SNR）测量结果符合理论预期，并用于优化采集参数。0.9 - 1.0毫秒的TE增量允许使用5毫秒或更短的重复时间（TR），并在保持良好图像质量且带状伪影最少的同时，提供了良好的水脂分解SNR性能。两名经验丰富的放射科医生对所有研究的图像进行了脂肪分离和图像质量评估。所有研究的所有图像均实现了均匀的脂肪分离和诊断图像质量。展示了志愿者和患者的示例。
多线圈IDEAL-SSFP成像可以产生具有均匀水脂分离的高质量电影心脏图像，对主磁场（Bo）不均匀性不敏感。这种方法为心脏成像中可靠的脂肪抑制提供了一种新方法。
