Next-generation MRI scanner designed for ultra-high-resolution human brain imaging at 7 Tesla.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38012321.
- Also identified by DOI 10.1038/s41592-023-02068-7 and PMC identifier 10703687.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
To increase granularity in human neuroimaging science, we designed and built a next-generation 7 Tesla magnetic resonance imaging scanner to reach ultra-high resolution by implementing several advances in hardware. To improve spatial encoding and increase the image signal-to-noise ratio, we developed a head-only asymmetric gradient coil (200 mT m<sup>-1</sup>, 900 T m<sup>-1</sup>s<sup>-1</sup>) with an additional third layer of windings. We integrated a 128-channel receiver system with 64- and 96-channel receiver coil arrays to boost signal in the cerebral cortex while reducing g-factor noise to enable higher accelerations. A 16-channel transmit system reduced power deposition and improved image uniformity. The scanner routinely performs functional imaging studies at 0.35-0.45 mm isotropic spatial resolution to reveal cortical layer functional activity, achieves high angular resolution in diffusion imaging and reduces acquisition time for both functional and structural imaging.
Medical subject headings
- Brain
- Magnetic Resonance Imaging