Breast cancer: Gadolinium-enhanced MR imaging with a 0.5-T open imager and three-point Dixon technique

被引:19
作者
Daniel, BL [1 ]
Butts, K [1 ]
Glover, GH [1 ]
Cooper, C [1 ]
Herfkens, RJ [1 ]
机构
[1] Stanford Univ, Dept Radiol, Lucas MRS Imaging Ctr, Stanford, CA 94305 USA
关键词
breast neoplasms; diagnosis; localization; MR; gadolinium;
D O I
10.1148/radiology.207.1.9530315
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
PURPOSE: To investigate the three-point Dixon technique as a method for obtaining fat-nulled images of contrast material-enhancing breast lesions with a 0.5-T open magnetic resonance (MR) imager. MATERIALS AND METHODS: Real and imaginary source images were obtained with an interleaved gradient-echo sequence with a repetition time of 550 msec and echo times of 12.8, 19.8, and 26.8 msec. Twenty-four to 28 sections were obtained in the sagittal plane with a 90 degrees flip angle, 256 x 192 matrix, 3-4.5-mm section thickness, and acquisition time of 10 minutes 54 seconds. A three-point Dixon reconstruction algorithm was used to generate water-specific, fat-specific, and combined images from the raw image data. Twelve breasts in 10 patients and one healthy volunteer were imaged. RESULTS: Three-point Dixon images were superior to extended tow-point Dixon and fat-suppressed images and to images generated by means of subtraction of three-dimensional fast spoiled gradient-echo images obtained before contrast material injection from those obtained after. CONCLUSION: Three-point Dixon imaging provides a robust method for creating fat-nulled images of enhancing breast lesions in the 0.5-T open MR environment. Water-specific three-point Dixon images are successful in regions of B-0 heterogeneity and are superior to fat-suppressed images. They are much less susceptible to motion artifact than are substraction images.
引用
收藏
页码:183 / 190
页数:8
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