Capacitive versus Overlap Decoupling of Adjacent Radio Frequency Phased Array Coil Elements: An Imaging Robustness Comparison When Sample Load Varies for 3 Tesla MRI
Joint Authors
Beck, Michael J.
Parker, Dennis L.
Hadley, J. Rock
Source
Concepts in Magnetic Resonance :Part B : Magnetic Resonance Engineering.
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-12-15
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
Phased array (PA) receive coils are built such that coil elements approximate independent antenna behavior.
One method of achieving this goal is to use an available decoupling method to decouple adjacent coil elements.
The purpose of this work was to compare the relative performance of two decoupling methods as a function of variation in sample load.
Two PA receive coils with 5 channels (5-ch) each, equal outer dimensions, and formed on 12 cm diameter cylindrical phantoms of conductivities 0.3, 0.6, and 0.9 S/m were evaluated for relative signal-to-noise ratio (SNR) and parallel imaging performance.
They were only tuned and matched to the 0.6 S/m phantom.
Simulated and measured axial, sagittal, and coronal 5-ch PA coil SNR ratios were compared by dividing the overlap by the capacitive decoupled coil SNR results.
Issues related to the selection of capacitor values for the two decoupling methods were evaluated by taking the ratio of the match and tune capacitors for large and small 2 channel (2-ch) PA coils.
The SNR ratios showed that the SNR of the two decoupling methods were very similar.
The inverse geometry-factor maps showed similar but better overall parallel imaging performance for the capacitive decoupled method.
The quotients for the 2-ch PA coils’ maximum and minimum capacitor value ratios are 3.28 and 1.38 for the large and 3.28 and 2.22 for the small PA.
The results of this paper demonstrate that as the sample load varies, the capacitive and overlap decoupling methods are very similar in relative SNR and this similarity continues for parallel imaging performance.
Although, for the 5-ch coils studied, the capacitive decoupling method has a slight SNR and parallel imaging advantage and it was noted that the capacitive decoupled coil is more likely to encounter unbuildable PA coil configurations.
American Psychological Association (APA)
Beck, Michael J.& Parker, Dennis L.& Hadley, J. Rock. 2020. Capacitive versus Overlap Decoupling of Adjacent Radio Frequency Phased Array Coil Elements: An Imaging Robustness Comparison When Sample Load Varies for 3 Tesla MRI. Concepts in Magnetic Resonance :Part B : Magnetic Resonance Engineering.،Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1139697
Modern Language Association (MLA)
Beck, Michael J.…[et al.]. Capacitive versus Overlap Decoupling of Adjacent Radio Frequency Phased Array Coil Elements: An Imaging Robustness Comparison When Sample Load Varies for 3 Tesla MRI. Concepts in Magnetic Resonance :Part B : Magnetic Resonance Engineering. No. 2020 (2020), pp.1-14.
https://search.emarefa.net/detail/BIM-1139697
American Medical Association (AMA)
Beck, Michael J.& Parker, Dennis L.& Hadley, J. Rock. Capacitive versus Overlap Decoupling of Adjacent Radio Frequency Phased Array Coil Elements: An Imaging Robustness Comparison When Sample Load Varies for 3 Tesla MRI. Concepts in Magnetic Resonance :Part B : Magnetic Resonance Engineering.. 2020. Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1139697
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1139697