> For the complete documentation index, see [llms.txt](https://rexis.gitbook.io/rexis/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://rexis.gitbook.io/rexis/volumetric-medical-imaging.md).

# Volumetric Medical Imaging

### Volumetric Medical Imaging

Volumetric imaging techniques generate 3D representations of internal anatomy, providing rich spatial information for diagnosis, surgical planning, and disease monitoring. These modalities capture detailed volumetric data beyond standard 2D slices.

![](https://lh7-rt.googleusercontent.com/slidesz/AGV_vUcmYDtMvXgEga-SbfhmrXS4Zt2LmdV5D95rkrd--nTiXaBt6dI_FjoAuaK0N20kyzaABspwiAGoVFGwHdl96uuHMY1quClF-16lus5D3IU7cHfvrtOSbpewJvx3kyHU8_DK5IEX=s2048?key=_t06K9zDHrDgeHDIPqC4uaCR)

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#### Computed Tomography (CT)

CT scans create 3D cross-sectional images of the body using multiple X-ray projections from various angles. The data is reconstructed into volumetric form and is especially useful for:

* Bone and organ segmentation
* Cardiovascular imaging
* Tumor detection and monitoring

**Data Support**

CT data is stored in the **DICOM** format as a stack of 2D slices forming a 3D volume.

Our platform ensures that **CT images are securely processed** using Equivariant Encryption (EE), enabling:

* Fine-tuning and evaluation on encrypted CT volumes
* Secure data storage and sharing
* Full compliance with patient privacy regulations

**Model Support**

We support secure model training and evaluation on encrypted CT data.

* [**VNet**](https://arxiv.org/abs/1606.04797)\
  A foundational 3D convolutional network architecture designed for volumetric segmentation of organs and lesions in CT images.

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#### Magnetic Resonance Imaging (MRI)

MRI is a non-invasive imaging modality that uses magnetic fields and radio waves to create high-contrast, high-resolution 3D scans of soft tissues. MRI is critical for:

* Brain and spinal cord imaging
* Musculoskeletal diagnostics
* Internal organ evaluation (e.g., liver, prostate, heart)

**Data Support**

MRI data is typically stored in **DICOM** format and consists of 3D volumes or time series (4D).\
With EE, our platform supports:

* **Encrypted storage and computation** on MRI scans
* Secure sharing across institutions
* Privacy-preserving training for clinical and research AI

**Model Support**

We support secure model evaluation and enhancement for encrypted MRI data.

* [**BME-X**](https://github.com/DBC-Lab/Brain_MRI_Enhancement.git)\
  A flexible MRI enhancement model that improves image quality via motion correction, super-resolution, denoising, contrast enhancement, and harmonization.

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