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Magnetic resonance cholangiopancreatography using optimized integrated combination with parallel imaging and compressed sensing technique

  • Shoma Nagata
  • Satoshi GoshimaEmail author
  • Yoshifumi Noda
  • Nobuyuki Kawai
  • Kimihiro Kajita
  • Hiroshi Kawada
  • Yukichi Tanahashi
  • Masayuki Matsuo
Hepatobiliary
  • 71 Downloads

Abstract

Purpose

To assess the combined parallel imaging (PI) and optimized integrated compressed sensing technique (prototype Compressed SENSE) for magnetic resonance cholangiopancreatography (MRCP) compared with conventional MRCP.

Methods

This prospective study was approved by our Institutional Review Board, and all patients provided written informed consent. A total of 56 consecutive patients (27 men and 29 women; mean age 67.2 years) underwent breath-hold three-dimensional (3D) MRCP with PI alone (BH-MRCP; acquisition time, 23 s), respiratory-triggered 3D MRCP with PI alone (RT-MRCP; 201 s) and respiratory-triggered 3D MRCP with Compressed SENSE (RT-MRCPcs; 45 s). Relative duct-to-periductal contrast ratios (RCs) of the pancreaticobiliary ducts were calculated for quantitative image analyses. Two radiologists graded the visibility of the pancreaticobiliary ducts, pancreatic cystic lesion, motion artifact, and overall image quality using a five-point rating scale for qualitative image analyses. Theses qualitative and quantitative measurements were then compared among the three sequences.

Results

RCs of the common bile duct, right hepatic duct (RHD), left hepatic duct (LHD), and main pancreatic duct at the pancreatic head, body, and tail segments, were significantly higher RT-MRCP, followed by RT-MRCPcs and BH-MRCP (P < 0.001). The visibility of the peripheral RHD and LHD was slightly better in RT-MRCP than in RT-MRCPcs and BH-MRCP (P < 0.001). The visibility of other pancreaticobiliary ducts, pancreatic cystic lesion, motion artifact, and overall image quality were almost comparable among three sequences.

Conclusion

The acquisition time was markedly reduced in RT-MRCPcs compared with conventional RT-MRCP while there were significant differences in both quantitative and qualitative analyses, the differences were small enough that the reduced acquisition time makes up for it.

Keywords

Magnetic resonance cholangiopancreatography Compressed sensing Respiratory triggered Pancreaticobiliary ducts Diagnostic imaging 

Notes

Compliance with ethical standards

Conflict of interest

Author disclosure of potential conflict of interest. No relevant conflicts of interest to disclose.

Research involving human participants and/or animals

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

The requirement for informed consent was waived by our Institutional Review Board.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Shoma Nagata
    • 1
  • Satoshi Goshima
    • 1
    Email author
  • Yoshifumi Noda
    • 1
  • Nobuyuki Kawai
    • 1
  • Kimihiro Kajita
    • 1
  • Hiroshi Kawada
    • 1
  • Yukichi Tanahashi
    • 1
  • Masayuki Matsuo
    • 1
  1. 1.Department of RadiologyGifu UniversityGifuJapan

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