For 4 observers, T1-weighted anatomical MRI data were acquired on a Philips Achieva 3T scanner at a resolution of 0.75 × 0.75 × 0.8 mm. For the remaining 2 observers, T1-weighted MRI data were acquired on a Philips 7T scanner using a 32-channel head coil at a resolution of 0.5 × 0.5 × 0.8 mm. For all observers, T2*-weighted images were acquired on a Philips 7T scanner using a 32-channel head coil at a resolution of 1.77 × 1.77 × 1.75 mm, with a field of view of 227 × 227 × 71.75 mm. We scanned 41 slices in interleaved order, meaning that first odd slices and then even slices were scanned. Scans covered the visual cortex and extended into the frontal cortex to include the FEF. Time repetition was 2.1 s, time echo was 25 ms, and the flip angle was 70°. Functional runs were 205 frames for the main experiment and 188 frames for the localizer experiment.
7t scanner
Manufactured by Philips
Sourced in Netherlands
The 7T scanner is a magnetic resonance imaging (MRI) system developed by Philips. It operates at a magnetic field strength of 7 tesla, providing high-resolution imaging capabilities for research applications.
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Lab products found in correlation
3 protocols using 7t scanner
1
High-Resolution 3T and 7T MRI Acquisition
2
7T MRI Protocol for Neuroimaging
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The MRI was performed with an actively shielded 7T scanner (Achieva, Philips, Best, Netherlands) equipped with a two-channel transmit and 32 channel receive phased-array head coil (Nova Medical, Wilmington, MA). B1 inhomogeneities were reduced by using dielectric pads (Teeuwisse, Brink, & Webb, 2012). The MRI protocol consisted of three-dimensional T1-weighted imaging, DTI, and DKI. Further details are provided in Supplementary Methods 1 .
3
Multimodal 7T brain imaging of small vessels
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Participants underwent 7T brain MRI on a Philips 7T scanner with a 32-channel receive head coil with a quadrature transmit coil (Nova Medical, MA). The scan protocol included 2D-Qflow velocity mapping acquisitions and blood-oxygen–level dependent (BOLD) sequences (sequence details eTable 1, links.lww.com/WNL/D397 ), with which 3 complementary aspects of small vessel function were measured.
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