This dataset introduces a Multi-Organ Gynaecological Magnetic Resonance Imaging for Brachytherapy-based Oncology (MOGaMBO) dataset, a novel magnetic resonance imaging dataset aimed to advance research in applications of computational intelligence in brachytherapy diagnosis and organ segmentation for cervical cancer treatment. The dataset comprises high-resolution T2-weighted 3D MR scans from 94 patients with locally advanced cervical cancer (stages IB2–IVA), adhering to FIGO guidelines for interstitial and intra-cavitary brachytherapy. The imaging was performed using a 1.5T GE Signa Explorer scanner, with acquisition parameters TR and TE set to optimal values for soft-tissue contrast at 2600ms and 155ms, respectively, combined with a pixel resolution of 0.5 × 0.5 mm² and 30–50 slices per scan. To ensure dosimetric consistency, bladder volume was standardized via Foley catheterization during imaging. The critical organs-at-risk—urinary bladder, rectum, sigmoid colon, and femoral heads, were manually contoured by expert radiation oncologists using the open-source ITK-SNAP platform, ensuring precise region-of-interest annotations. The dataset underwent rigorous deidentification to protect patient privacy, removing all demographic and identifiable information. MOGaMBO provides a standardized, privacy-compliant resource for developing and validating medical image segmentation or representation learning algorithms, and brachytherapy-related research tools. This dataset addresses a critical gap in accessible, multi-organ imaging resources for the gynaecological brachytherapy dataset, with applications in treatment planning, and AI-driven clinical research.

Zenodo Link: https://zenodo.org/records/15156638

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• ⁠Data is available in NIfTI format, which is compatible with medical imaging software and easy to process with the Nibabel or SimpleITK libraries in Python.
• ⁠Segmentation Labels: Organs-at-risk (OARs): Urinary bladder, rectum, sigmoid colon, femoral heads.
  — Labels are stored as multi-label masks (0 = background, 1 = Urinary bladder, 2 = rectum, 3 = sigmoid colon, 4 = femoral heads).

MOGaMBO/
├── P1/
│ ├── mriP1raw.nii # Raw 3D T2-weighted MR volume
│ ├── mriP1GTM.nii # Multilabel mask for urinary bladder, rectum, colon, femoral heads (left/right combined)
├── P2/
│ └── ...
├── P94/
| └── ...
└──