TotalSegmentator MR
TotalSegmentator MR (version 2.5.0) is a peer-reviewed MRI Image Segmentation model for human medical imaging, available to run on managed, EU-hosted cloud GPUs through Nalvera.AI — upload a scan, run the model, and download reproducible, open-format results with no local GPU or CUDA setup.
Model card
Description
Whole-body human MRI segmentation covering 50 anatomical structures across organs, bones, vessels, and major muscle groups.
Training data
Trained on a multi-sequence MR dataset (TotalSegmentator MR extension, Akinci D'Antonioli et al. 2024) covering common abdominal/pelvic and whole-body sequences; expert-reviewed annotations. Adult human anatomy.
Intended use
Research segmentation of major organs and structures in MR. Best on the sequence types represented in training; intended for cohort/morphometric analysis and as a correction starting point, not diagnosis.
Known limitations
MR intensity is not standardised across scanners/sequences, so performance varies more than CT. Degrades on sequences/contrasts outside the training distribution, heavy motion or susceptibility artefact, and non-standard fields of view.
Expected runtime
~2–5 min/scan on a modern GPU (medium class), sequence- and resolution-dependent.
Input modality
MRI
Species
human
Output format
.nii.gz
Output classes (50)
1 spleen2 kidney_right3 kidney_left4 gallbladder5 liver6 stomach7 pancreas8 adrenal_gland_right9 adrenal_gland_left10 lung_left11 lung_right12 esophagus13 small_bowel14 duodenum15 colon16 urinary_bladder17 prostate18 sacrum19 vertebrae20 intervertebral_discs21 spinal_cord22 heart23 aorta24 inferior_vena_cava25 portal_vein_and_splenic_vein26 iliac_artery_left27 iliac_artery_right28 iliac_vena_left29 iliac_vena_right30 humerus_left31 humerus_right32 scapula_left33 scapula_right34 clavicula_left35 clavicula_right36 femur_left37 femur_right38 hip_left39 hip_right40 gluteus_maximus_left41 gluteus_maximus_right42 gluteus_medius_left43 gluteus_medius_right44 gluteus_minimus_left45 gluteus_minimus_right46 autochthon_left47 autochthon_right48 iliopsoas_left49 iliopsoas_right50 brain
Citations & references
Research use only — not a medical device. Outputs are not
validated for clinical diagnosis or treatment.
Run this model →