Keywords: High-Field MRI, Parallel Imaging
Motivation: To improve signal-to-noise-ratio (SNR) in deep brain structures while using high-density receive arrays at 7T.
Goal(s): Compare SNR and g-factor performance of conventional transmit-only receive-only arrays with receive arrays combined with transceiver arrays.
Approach: Transceive function was introduced on 8Tx63Rx and 16Tx96Rx 7T head coils, so that the number of receive channels during acquisition increased by 8 and 16, respectively. Three healthy volunteers were scanned, and SNR and g-factor maps were calculated for the different configurations.
Results: The transceiver configuration provided about 16% increase in the central SNR. At higher acceleration factors, especially the 112-channel receive configuration provided improved g-factor performance.
Impact: : High-density receive-only arrays provide high SNR close to the surface while maintaining the central SNR under sample noise dominant conditions. Transceiver loops surrounding the receive array enhances the central SNR at 7T, although not as high as reported at 10.5T.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Keywords