This is a wavelet-compressed version of the FOMO-300K brain MRI dataset, using the jvol compression format. All NIfTI files (.nii.gz) have been compressed to .jvol format using quality 60 (lossy), achieving approximately 4.1x compression over the original gzipped NIfTI data.

What is jvol?

jvol is a wavelet-based JPEG compression format for 3D medical images. It supports both lossy and lossless compression and can achieve significant… See the full description on the dataset page: https://huggingface.co/datasets/liamchalcroft/FOMO300K-jvol.