Document Detail

Accelerated phase-contrast cine MRI using k-t SPARSE-SENSE.
MedLine Citation:
PMID:  22083998     Owner:  NLM     Status:  MEDLINE    
Phase-contrast (PC) cine MRI is a promising method for assessment of pathologic hemodynamics, including cardiovascular and hepatoportal vascular dynamics, but its low data acquisition efficiency limits the achievable spatial and temporal resolutions within clinically acceptable breath-hold durations. We propose to accelerate PC cine MRI using an approach which combines compressed sensing and parallel imaging (k-t SPARSE-SENSE). We validated the proposed 6-fold accelerated PC cine MRI against 3-fold accelerated PC cine MRI with parallel imaging (generalized autocalibrating partially parallel acquisitions). With the programmable flow pump, we simulated a time varying waveform emulating hepatic blood flow. Normalized root mean square error between two sets of velocity measurements was 2.59%. In multiple blood vessels of 12 control subjects, two sets of mean velocity measurements were in good agreement (mean difference = -0.29 cm/s; lower and upper 95% limits of agreement = -5.26 and 4.67 cm/s, respectively). The mean phase noise, defined as the standard deviation of the phase in a homogeneous stationary region, was significantly lower for k-t SPARSE-SENSE than for generalized autocalibrating partially parallel acquisitions (0.05 ± 0.01 vs. 0.19 ± 0.06 radians, respectively; P < 0.01). The proposed 6-fold accelerated PC cine MRI pulse sequence with k-t SPARSE-SENSE is a promising investigational method for rapid velocity measurement with relatively high spatial (1.7 mm × 1.7 mm) and temporal (∼35 ms) resolutions.
Daniel Kim; Hadrien A Dyvorne; Ricardo Otazo; Li Feng; Daniel K Sodickson; Vivian S Lee
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2011-11-14
Journal Detail:
Title:  Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine     Volume:  67     ISSN:  1522-2594     ISO Abbreviation:  Magn Reson Med     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-03-16     Completed Date:  2012-07-19     Revised Date:  2014-09-15    
Medline Journal Info:
Nlm Unique ID:  8505245     Medline TA:  Magn Reson Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1054-64     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Wiley Periodicals, Inc.
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MeSH Terms
Blood Flow Velocity
Cardiac-Gated Imaging Techniques
Computer Simulation
Image Enhancement / methods
Image Processing, Computer-Assisted / methods
Liver / blood supply*
Magnetic Resonance Imaging, Cine / instrumentation,  methods*
Phantoms, Imaging
Grant Support
R01 DK088375/DK/NIDDK NIH HHS; R01 DK088375-02/DK/NIDDK NIH HHS; R01 EB000447/EB/NIBIB NIH HHS; R01 EB000447-10/EB/NIBIB NIH HHS; R01-DK069373/DK/NIDDK NIH HHS; R01-EB000447-07A1/EB/NIBIB NIH HHS; R01-HL092439/HL/NHLBI NIH HHS

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