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Respiratory motion compensated MR cholangiopancreatography at 3.0 Tesla

Authors
 Sang-Young Zho  ;  Jaeseok Park  ;  Jin-Young Choi  ;  Dong-Hyun Kim 
Citation
 JOURNAL OF MAGNETIC RESONANCE IMAGING, Vol.32(3) : 726-732, 2010 
Journal Title
JOURNAL OF MAGNETIC RESONANCE IMAGING
ISSN
 1053-1807 
Issue Date
2010
MeSH
Artifacts* ; Cholangiopancreatography, Magnetic Resonance/methods* ; Cohort Studies ; Female ; Humans ; Imaging, Three-Dimensional* ; Male ; Motion ; Reference Values ; Respiration ; Respiratory-Gated Imaging Techniques/methods* ; Sensitivity and Specificity
Keywords
MRCP ; PACE ; irregular breathing ; respiratory motion ; navigator echo
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
Full Text
http://onlinelibrary.wiley.com/doi/10.1002/jmri.22307/abstract
DOI
10.1002/jmri.22307
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Park, Jae Seok(박재석)
Choi, Jin Young(최진영) ORCID logo https://orcid.org/0000-0002-9025-6274
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/101933
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