| Current CONtrolled Transmit And Receive Coil Elements (CONTAR) for Parallel Acquisition and Parallel Excitation Techniques at High-Field MRI. | |
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MedLine Citation:
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PMID: 22162914 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A novel intrinsically decoupled transmit and receive radio-frequency coil element is presented for applications in parallel imaging and parallel excitation techniques in high-field magnetic resonance imaging. Decoupling is achieved by a twofold strategy: during transmission elements are driven by current sources, while during signal reception resonant elements are switched to a high input impedance preamplifier. To avoid B(0) distortions by magnetic impurities or DC currents a resonant transmission line is used to relocate electronic components from the vicinity of the imaged object. The performance of a four-element array for 3 T magnetic resonance tomograph is analyzed by means of simulation, measurements of electromagnetic fields and bench experiments. The feasibility of parallel acquisition and parallel excitation is demonstrated and compared to that of a conventional power source-driven array of equivalent geometry. Due to their intrinsic decoupling the current-controlled elements are ideal basic building blocks for multi-element transmit and receive arrays of flexible geometry. |
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Authors:
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E Kirilina; A Kühne; T Lindel; W Hoffmann; K H Rhein; T Riemer; F Seifert |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-21 |
Journal Detail:
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Title: Applied magnetic resonance Volume: 41 ISSN: 0937-9347 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9204100 Medline TA: Appl Magn Reson Country: - |
Other Details:
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Languages: ENG Pagination: 507-523 Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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