Brain Injury Outcomes (BIOS) Attribution Non-Commercial Yes Johns Hopkins University NITRC Non-Contrast Head CT of Stroke Patients with Brain Masks We released 35 subject's non-contrast CT scans including manually segmented brain masks from 2 readers. The data is from "Validated automatic brain extraction of head CT images" (https://doi.org/10.1016/j.neuroimage.2015.03.074). The data are from stroke patients from multiple centers and can be used a validation data set for brain segmentation on CT. 2019-10-09 Initial Release Non-Contrast Head CT of Stroke Patients with Brain Masks Attribution Non-Commercial, CT http://www.nitrc.org/projects/stroke_ct_2019/, http://www.nitrc.org/projects/stroke_ct_2019/