Document Detail

Dynamic MR imaging of a minipig's knee using a high-density multi-channel receive array and a movement device.
MedLine Citation:
PMID:  23014944     Owner:  NLM     Status:  MEDLINE    
OBJECT: To construct an optimised, high-density receive array and a movement device to achieve dynamic imaging of the knee in orthopedic large animal models (e.g., minipigs) at 1.5 T.
MATERIALS AND METHODS: A 13-channel RF receive array was constructed, and the crucial choice of the array element size (based on considerations like region of interest, geometry of the minipig's knee, achievable signal-to-noise ratio, applicability of parallel imaging, etc.) was determined using the Q factors of loops with different sizes. A special movement device was constructed to guide and produce a reproducible motion of the minipig's knee during acquisition.
RESULTS: The constructed array was electrically characterised and the reproducibility of the cyclic motion was validated. Snapshots of dynamic in vivo images taken at a temporal resolution (308 ms) are presented. Some of the fine internal structures within the minipig's knee, like cruciate ligaments, are traced in the snapshots.
CONCLUSION: This study is a step towards making dynamic imaging which can give additional information about joint injuries when static MRI is not able to give sufficient information, a routine clinical application. There, the combination of a high-density receive array and a movement device will be highly helpful in the diagnosis and therapy monitoring of knee injuries in the future.
Sairamesh Raghuraman; Joachim H X Schrauth; Daniel L Weber; Frank Resmer; Meike Haddad-Weber; Felix A Breuer; Ulrich Nöth; Peter M Jakob; Titus Lanz; Daniel Haddad
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Publication Detail:
Type:  Journal Article     Date:  2012-09-27
Journal Detail:
Title:  Magma (New York, N.Y.)     Volume:  26     ISSN:  1352-8661     ISO Abbreviation:  MAGMA     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-03-29     Completed Date:  2013-09-16     Revised Date:  2014-01-20    
Medline Journal Info:
Nlm Unique ID:  9310752     Medline TA:  MAGMA     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  215-28     Citation Subset:  IM    
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MeSH Terms
Biomechanical Phenomena
Equipment Design
Joints / anatomy & histology*,  physiology*
Magnetic Resonance Imaging / instrumentation*,  statistics & numerical data
Models, Animal
Phantoms, Imaging
Swine, Miniature / anatomy & histology,  physiology
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