Subject	Medical Imaging
Specific subject area	Serial MRIs of the abdomen of patients undergoing radiotherapy were collected and the luminal gastro-intestinal tract was segmented.
Type of data	Raw MRIs, organ segmentation
Data collection	Serial 0.35T MRIs from patients who were treated on an MR-Linac for tumors located in the abdomen were collected. The stomach, small intestine and large intestine were manually segmented on all MRIs by a team of annotators under the supervision of a board-certified radiation oncologist. Annotator segmentations were validated on 4 representative abdominal MRIs by comparing to the radiation oncologist's contours using 3D Hausdorff distance and 3D Dice coefficient metrics.
Data source location	Department of Human Oncology, University of Wisconsin-Madison, 600 Highland Ave, Madison, Wisconsin 53,792, USA.
Data accessibility	Repository name: Kaggle Data identification number: DOI: 10.34740/kaggle/ds/3577354 Direct URL to data: https://www.kaggle.com/ds/3577354
Related research article	None