Elliott et al., 2026 Cluster Scanning

These data represent T1-weighted structural imaging for 38 individuals from Elliott et al., 2026 Nature Communications. Each participant completed a 6-visit longitudinal protocol. Critically, to assess test-retest measurement error, participants completed a pair of scanning sessions on closely spaced separate days at baseline, as well as at approximately six months and one year later. The 6 visits were completed across a mean of 11.6 months (range = 7.7 to 14.3 months). The mean interval between test and retest sessions was 7.8 days (range = 1 to 23 days). In the first half of each scanning session, a single standard scan was collected alongside a “cluster scanning” block of four rapid compressed sensing (CS) scans. Then, each participant was briefly taken out of the scanner to stretch and use the restroom. After the break, the participant was repositioned, and the scanner re-shimmed. An identical set of four rapid scans was repeated, yielding a total of one standard scan and eight rapid CS scans collected in each scan session, and a total of 6 standard scans and 48 rapid CS scans across the longitudinal study. The study protocol was approved by the Institutional Review Board of Mass General Brigham Healthcare. All participants provided written informed consent in accordance with the guidelines of the Institutional Review Board of Mass General Brigham Healthcare and were compensated. These data were used to investigate the measurement properties of cross-sectional compressed sensing morphometrics and cluster scanning in Elliott et al., 2023 Neuroimage (https://doi.org/10.1016/j.neuroimage.2023.120173), Elliott et al., 2024 Imaging Neuroscience (https://doi.org/10.1162/imag_a_00175) and Elliott et al., 2026 Nature Communications (doi to be added). [RAW MRI DATA FORTHCOMING]