Sargent M A, Poskitt K J, Xiang Q S, An L
Department of Radiology, Children's And Women's Health Centre of British Columbia, 4500 Oak Street, Vancouver, BC V6H 3N1, Canada.
Pediatr Radiol. 1999 Jun;29(6):444-8. doi: 10.1007/s002470050613.
Effective fat suppression is desirable in clinical magnetic resonance imaging. Conventional frequency selective fat suppression is dependent on accurate prescan shimming and is subject to artifacts due to magnetic field inhomogeneity. Quadrature three-point water-fat imaging with direct phase encoding is an alternative technique for fat suppression that has been previously described in adult volunteers and patients.
To evaluate the use of three-point water-fat imaging with direct phase encoding for fat-suppressed MR scans in children.
Sixty-two three-point water-fat imaging studies were performed in 55 children 2 months to 18 years old. T 1-weighted fat-suppressed (water) images from this sequence were compared with frequency selective fat-suppressed images obtained in 15 patients. The reliability and subjective quality of the sequence were assessed in the remaining 47 cases.
High-quality fat suppression was achieved in all anatomic sites studied, even where frequency selective fat-suppression failed due to magnetic susceptibility artifact. The three-point water-fat sequence was visually preferred to the frequency selective fat saturation technique in 15/15 cases.
Three-point water-fat imaging has replaced the conventional frequency selective technique for fat suppression on T 1-weighted MR imaging at our institution.
在临床磁共振成像中，有效的脂肪抑制是理想的。传统的频率选择性脂肪抑制依赖于精确的预扫描匀场，并且容易受到磁场不均匀性导致的伪影影响。具有直接相位编码的正交三点水脂成像技术是一种用于脂肪抑制的替代技术，此前已在成人志愿者和患者中有所描述。
评估具有直接相位编码的三点水脂成像技术在儿童脂肪抑制磁共振扫描中的应用。
对55名年龄在2个月至18岁的儿童进行了62次三点水脂成像研究。将该序列获得的T1加权脂肪抑制（水）图像与15名患者获得的频率选择性脂肪抑制图像进行比较。在其余47例病例中评估该序列的可靠性和主观质量。
在所有研究的解剖部位均实现了高质量的脂肪抑制，即使在因磁化率伪影导致频率选择性脂肪抑制失败的部位也是如此。在15/15的病例中，三点水脂序列在视觉上优于频率选择性脂肪饱和技术。
在我们机构，三点水脂成像已取代传统的频率选择性技术用于T1加权磁共振成像中的脂肪抑制。
