Respiratory motion compensated MR cholangiopancreatography at 3.0 Tesla

Sang Young Zho, Jaeseok Park, Jin Young Choi, Dong Hyun Kim

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Purpose: To reduce irregular respiratory motion-induced artifacts in free-breathing prospective navigator-triggered three-dimensional (3D) MR cholangiopancreatography (MRCP). Materials and Methods: A reference respiration model was estimated from the first-five respiration periods during the initial navigator scan. With the navigator information acquired before and after triggering, the un-acquired diaphragm position during the actual imaging was interpolated using the amplitude-scaled reference model. Craniocaudal translational motion during imaging was retrospectively corrected using the estimated diaphragm position. T2-weighted 3D MRCP data were acquired from 17 healthy volunteers. For quantitative analysis, contrast-to-noise ratio (CNR) and relative contrast (RC) of the biliary tree and gallbladder were compared using the paired t-test. Results: The CNR and RC of the biliary tree and gallbladder were significantly higher (P < 0.05) in the maximum intensity projection images after motion compensation. Conclusion: The proposed algorithm can be an effective tool to reduce the irregular respiratory motion-induced artifacts in 3D MRCP imaging.

Original languageEnglish
Pages (from-to)726-732
Number of pages7
JournalJournal of Magnetic Resonance Imaging
Volume32
Issue number3
DOIs
Publication statusPublished - 2010 Sep

Keywords

  • Irregular breathing
  • MRCP
  • Navigator echo
  • PACE
  • Respiratory motion

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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