中国物理B ›› 2008, Vol. 17 ›› Issue (1): 328-334.doi: 10.1088/1674-1056/17/1/058

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Phase-sensitive fat suppression steady-state free procession sequence with phase correction

俎中良1, 周堃1, 包尚联1, 高嵩2, 张仕刚3   

  1. (1)Beijing City Key Laboratory of Medical Physics and Engineering, Peking University, Beijing 100871, China; (2)Beijing City Key Laboratory of Medical Physics and Engineering, Peking University, Beijing 100871, China;Medical Physics Department, Health Science Center of Peking University, Beijing 100083, China; (3)Siemens Mindit MRI Center, Shenzhen 518112, China
  • 出版日期:2008-01-20 发布日期:2008-01-20
  • 基金资助:
    Project partially supported by the National Natural Science Foundation of China (Grant Nos 10527003 and 60672104), the State Key Development Program for Basic Research of China (Grant No 2006CB705700-05), Joint Research Foundation of Beijing Education Com

Phase-sensitive fat suppression steady-state free procession sequence with phase correction

Zu Zhong-Liang(俎中良)a), Zhou Kun(周堃)a), Zhang Shi-Gang(张仕刚)b), Gao Song(高嵩)a)c), and Bao Shang-Lian(包尚联)a)†   

  1. a Beijing City Key Laboratory of Medical Physics and Engineering, Peking University, Beijing 100871, China; b Siemens Mindit MRI Center, Shenzhen 518112, China; c Medical Physics Department, Health Science Center of Peking University, Beijing 100083, China
  • Online:2008-01-20 Published:2008-01-20
  • Supported by:
    Project partially supported by the National Natural Science Foundation of China (Grant Nos 10527003 and 60672104), the State Key Development Program for Basic Research of China (Grant No 2006CB705700-05), Joint Research Foundation of Beijing Education Com

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摘要： Robust and fast fat suppression is a challenge in balanced steady-state free precession (SSFP) magnetic resonance imaging. Although single-acquisition phase-sensitive SSFP can provide fat-suppressed images in short scan time, phase errors, especially spatially-dependent phase shift, caused by a variety of factors may result in misplacement of fat and water voxels. In this paper, a novel phase correction algorithm was used to calibrate those phase errors during image reconstruction. This algorithm corrects phase by region growing, employing both the magnitude and the phase information of image pixels. Phantom and \textit{in vivo} imagings were performed to validate the technique. As a result, excellent fat-suppressed images were acquired by using single-acquisition phase-sensitive SSFP with phase correction.

关键词: steady-state free precession, fat suppression, phase-sensitive, phase correction

Abstract: Robust and fast fat suppression is a challenge in balanced steady-state free precession (SSFP) magnetic resonance imaging. Although single-acquisition phase-sensitive SSFP can provide fat-suppressed images in short scan time, phase errors, especially spatially-dependent phase shift, caused by a variety of factors may result in misplacement of fat and water voxels. In this paper, a novel phase correction algorithm was used to calibrate those phase errors during image reconstruction. This algorithm corrects phase by region growing, employing both the magnitude and the phase information of image pixels. Phantom and in vivo imagings were performed to validate the technique. As a result, excellent fat-suppressed images were acquired by using single-acquisition phase-sensitive SSFP with phase correction.

Key words: steady-state free precession, fat suppression, phase-sensitive, phase correction

中图分类号:  (Magnetic resonance imaging)

  • 87.61.-c