Document Detail


Acceleration apportionment: A method of improved 2D SENSE acceleration applied to 3D contrast-enhanced MR angiography.
MedLine Citation:
PMID:  23450817     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: In 2D SENSE-accelerated 3D Cartesian acquisition, the net acceleration factor R is the product of the two individual accelerations, R = RY × RZ . Acceleration Apportionment tailors acceleration parameters (RY , RZ ) to improve parallel imaging performance on a patient- and coil-specific basis and is demonstrated in contrast-enhanced MR angiography. METHODS: A performance metric is defined based on coil sensitivity information which identifies the (RY , RZ ) pair that optimally trades off image quality with scan time reduction on a patient-specific basis. Acceleration Apportionment is evaluated using retrospective analysis of contrast-enhanced MR angiography studies, and prospective studies in which optimally apportioned parameters are compared with standard acceleration parameters. RESULTS: The retrospective studies show strong variability in optimal acceleration parameters between anatomic regions and between patients. Prospective application of apportionment to foot contrast-enhanced MR angiography with an 8-channel receiver array provides a 20% increase in net acceleration with improved contrast-to-noise ratio. Application to 16-channel contrast-enhanced MR angiography of the feet and calves suggests 10% acceleration increase to R > 13 and no contrast-to-noise ratio loss. The specific implementation allows the optimum (RY , RZ ) pair to be determined within one minute. CONCLUSION: Optimum 2D SENSE acceleration parameters can be automatically chosen on a per-exam basis to allow improved performance without disrupting the clinical workflow. Magn Reson Med, 2013. © 2013 Wiley Periodicals, Inc.
Authors:
Paul T Weavers; Eric A Borisch; Casey P Johnson; Stephen J Riederer
Related Documents :
24768077 - Are combined ct scans of the thorax being overused?
22470787 - Case report of xanthogranulomatous cholecystitis, review of its sonographic and magneti...
25103727 - Pre-transplant diagnosis of hepatocellular carcinoma by gadoxetic acid-enhanced and dif...
22565907 - Orbital volume and surface after le fort iii advancement in syndromic craniosynostosis.
8141017 - Diagnosis of achilles tendon xanthoma in patients with heterozygous familial hyperchole...
23832317 - Multi-detector spiral ct study of the relationships between pulmonary ground-glass nodu...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-2-28
Journal Detail:
Title:  Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine     Volume:  -     ISSN:  1522-2594     ISO Abbreviation:  Magn Reson Med     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-3-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8505245     Medline TA:  Magn Reson Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2013 Wiley Periodicals, Inc.
Affiliation:
MR Laboratory, Mayo Clinic, Rochester, Minnesota, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Chemical Degradation in Organic Light-Emitting Devices: Mechanisms and Implications for the Design o...
Next Document:  Blast cell deficiency of CD11a as a marker of acute megakaryoblastic leukemia and transient myelopro...