A flexible 12-channel transceiver array of transmission line resonators for 7 T MRI

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dc.contributor.authorVít Martincs
dc.date.accessioned2018-09-25T12:20:11Z
dc.date.available2018-09-25T12:20:11Z
dc.date.issued2018cs
dc.description.abstractA flexible transceiver array based on transmission line resonators (TLRs) combining the advantages of coil arrays with the possibility of form-fitting targeting cardiac MRI at 7 T is presented. The design contains 12 elements which are fabricated on a flexible substrate with rigid PCBs attached on the center of each element to place the interface components, i.e. transmit/receive (T/R) switch, power splitter, pre-amplifier and capacitive tuning/matching circuitry. The mutual coupling between elements is cancelled using a decoupling ring-based technique. The performance of the developed array is evaluated by 3D electromagnetic simulations, bench tests, and MR measurements using phantoms. Efficient inter-element decoupling is demonstrated in flat configuration on a box-shaped phantom (Sij < −19 dB), and bent on a human torso phantom (Sij < −16 dB). Acceleration factors up to 3 can be employed in bent configuration with reasonable g-factors (<1.7) in an ROI at the position of the heart. The array enables geometrical conformity to bodies within a large range of size and shape and is compatible with parallel imaging and parallel transmission techniques.en
dc.format.extent12cs
dc.identifier.issn6360cs
dc.identifier.urihttps://dspace.tul.cz/handle/15240/32074
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S1090780718302180?via=ihub
dc.language.isoengcs
dc.relation.ispartofseries0cs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S1090780718302180?via=ihubcs
dc.subjectRF coilcs
dc.subjectTransceiver coilcs
dc.subjectTransmission line resonatorscs
dc.subjectMechanical flexibilitycs
dc.subjectUltra high field MRIcs
dc.titleA flexible 12-channel transceiver array of transmission line resonators for 7 T MRIen
local.identifier.publikace5550
local.relation.issueListopadcs
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