Optimized 64‐channel array configurations for accelerated simultaneous multislice acquisitions in 3T cardiac MRI
Purpose Three 64‐channel cardiac coils with different detector array configurations were designed and constructed to evaluate acceleration capabilities in simultaneous multislice (SMS) imaging for 3T cardiac MRI. Methods Three 64‐channel coil array configurations obtained from a simulation‐guided de...
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Published in | Magnetic resonance in medicine Vol. 86; no. 4; pp. 2276 - 2289 |
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Main Authors | , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
Wiley Subscription Services, Inc
01.10.2021
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Subjects | |
Online Access | Get full text |
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Summary: | Purpose
Three 64‐channel cardiac coils with different detector array configurations were designed and constructed to evaluate acceleration capabilities in simultaneous multislice (SMS) imaging for 3T cardiac MRI.
Methods
Three 64‐channel coil array configurations obtained from a simulation‐guided design approach were constructed and systematically evaluated regarding their encoding capabilities for accelerated SMS cardiac acquisitions at 3T. Array configuration AUni‐sized consists of uniformly distributed equally sized loops in an overlapped arrangement, BGapped uses a gapped array design with symmetrically distributed equally sized loops, and CDense has non‐uniform loop density and size, where smaller elements were centered over the heart and larger elements were placed surrounding the target region. To isolate the anatomic variation from differences in the coil configurations, all three array coils were built with identical semi‐adjustable housing segments. The arrays’ performance was compared using bench‐level measurements and imaging performance tests, including signal‐to‐noise ratio (SNR) maps, array element noise correlation, and SMS acceleration capabilities. Additionally, all cardiac array coils were evaluated on a healthy volunteer.
Results
The array configuration CDense with the non‐uniformly distributed loop density showed the best overall cardiac imaging performance in both SNR and SMS encoding power, when compared to the other constructed arrays. The diffusion weighted cardiac acquisitions on a healthy volunteer support the favorable accelerated SNR performance of this array configuration.
Conclusion
Our results indicate that optimized highly parallel cardiac arrays, such as the 64‐channel coil with a non‐uniform loop size and density improve highly accelerated SMS cardiac MRI in comparison to symmetrically distributed loop array designs. |
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Bibliography: | Funding information NIH grant number R01HL131635; Federal Ministry of Education and Research Germany (BMBF) [grant number IN2016‐2‐226] ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0740-3194 1522-2594 |
DOI: | 10.1002/mrm.28843 |