Segmentation accuracy on the 2017 MICCIA ACDC dataset. Segmentation accuracy is reported as Dice coefficient in the ACDC challenge, but as IoU elsewhere in this work; therefore, both are reported here. (Note that Dice = 2 × IoU/(1 + IoU)). Results are reported for the Network B variant of the Ω-Net; for the results by Isensee et al. (2017) published in STACOM; and for the same group’s unpublished arxiv.org revision Isensee et al. (2018). Boldface formatting indicates the best performing model for each foreground class. MICCAI: Medical Image Computing and Computer Assisted Intervention Society; ACDC: Automated Cardiac Diagnosis Challenge.