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Feasibility of 3D navigator-triggered magnetic resonance cholangiopancreatography with combined parallel imaging and compressed sensing reconstruction at 3T

 Nieun Seo  ;  Mi‐Suk Park  ;  Kyunghwa Han  ;  Dongeun Kim  ;  Kevin F. King  ;  Jin‐Young Choi  ;  Honsoul Kim  ;  Hye Jin Kim  ;  Minsu Lee  ;  Heejin Bae  ;  Myeong‐Jin Kim 
 Journal of Magnetic Resonance Imaging, Vol.46(5) : 1289-1297, 2017 
Journal Title
 Journal of Magnetic Resonance Imaging 
Issue Date
MRCP ; compressed sensing ; navigator-triggered ; parallel imaging
PURPOSE: To assess the feasibility of 3D navigator-triggered magnetic resonance cholangiopancreatography (MRCP) with combined parallel imaging (PI) and compressed sensing (CS). MATERIALS AND METHODS: With Institutional Review Board approval, 30 consecutive patients who underwent MRCP for suspected pancreaticobiliary disease were prospectively recruited. All patients underwent 3D navigator-triggered MRCP with conventional PI alone, and with combined PI and CS using a 3T machine. The acquisition time and relative duct-to-periductal contrast ratios (RCs) at three biliary segments were quantitatively compared between the two MRCP methods. Qualitative image parameters were independently evaluated by two blinded radiologists, and were compared between two methods using the Wilcoxon signed-rank test. RESULTS: The mean acquisition time of MRCP with combined PI and CS (131.87 ± 33.60 sec) was significantly shorter compared with that of MRCP with PI (253.63 ± 56.08 sec; P < 0.001). The RC obtained using MRCP with combined PI and CS at two segments was slightly lower compared to that obtained using MRCP with PI (P = 0.007 and 0.002). Both reviewers found no significant differences in duct visualization, overall image quality, and degree of artifacts between the two methods (P ≥ 0.063; P = 0.637; and P = 0.752, respectively). Lesion conspicuity and confidence in duct abnormalities were comparable between two MRCP methods in both readers (P = 0.564 and P > 0.999). CONCLUSION: Combined PI and CS reconstruction is feasible for 3D navigator-triggered MRCP, providing image quality comparable to that of MRCP with PI alone, in about half the acquisition time.EL OF EVIDENCE: 2 Technical Efficacy: Stage 1 J. Magn. Reson. Imaging 2017;46:1289-1297.
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1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Kim, Myeong Jin(김명진) ORCID logo https://orcid.org/0000-0001-7949-5402
Kim, Hon Soul(김한솔)
Park, Mi-Suk(박미숙) ORCID logo https://orcid.org/0000-0001-5817-2444
Bae, Heejin(배희진) ORCID logo https://orcid.org/0000-0002-1227-8646
Seo, Nieun(서니은) ORCID logo https://orcid.org/0000-0001-8745-6454
Lee, Minsu(이민수)
Choi, Jin Young(최진영) ORCID logo https://orcid.org/0000-0002-9025-6274
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