---
id: monai
version: "1.6.0"
license: Apache License 2.0
license_treatment: permissive
maintenance: active
---

# monai — AI Toolkit for Healthcare Imaging

License: permissive · Maintenance: active · Downloads: 542.8K/mo

## What it is and what it does

MONAI is a PyTorch-based framework designed for deep learning in healthcare imaging. It sits on top of NumPy and PyTorch and provides domain-specific building blocks—transforms for preprocessing multi-dimensional medical data, network architectures, loss functions, and evaluation metrics—aimed at researchers and clinicians building end-to-end training workflows. The framework is part of the PyTorch Ecosystem and emphasizes compositional, portable APIs that integrate into existing workflows.

The package targets academic, industrial, and clinical researchers. It handles the standardized, optimized setup of deep learning models for medical imaging, reducing boilerplate and allowing users to focus on domain logic rather than infrastructure. Multi-GPU and multi-node data parallelism are built in. Installation is straightforward via pip, and the project is actively maintained with support for modern Python versions.

Use it for:

- Build and train classification or segmentation models on medical imaging datasets (CT, MRI scans).
- Preprocess multi-dimensional medical imaging data with domain-specific transforms.
- Evaluate deep learning models using healthcare-specific metrics and loss functions.
- Deploy end-to-end training workflows for clinical imaging applications.
- Leverage community-contributed models from the MONAI Model Zoo for transfer learning.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

MONAI is a PyTorch-based framework for building deep learning models on medical imaging data, providing pre-processing, network architectures, loss functions, and evaluation metrics tailored to healthcare applications.

Yes. MONAI is actively maintained, has low install friction, carries a permissive license, and provides a mature, well-documented framework purpose-built for medical imaging deep learning. It is suitable for researchers and practitioners building healthcare imaging applications with PyTorch. No known security vulnerabilities as of the query date.

## Install

pip install monai
uv add monai
poetry add monai

## Installing monai

Before you install: Low install friction with a pure-Python wheel distribution. Actively maintained with a recent release 53 days ago and ongoing development; the project has 8597 stars and supports current Python versions (3.10–3.13).

License in practice: Apache License 2.0 is permissive, allowing commercial and private use with minimal restrictions beyond attribution and liability disclaimers.

Quickstart:

pip install monai

import monai
from monai.transforms import Compose, LoadImage

transforms = Compose([LoadImage(image_only=True)])

Requires PyTorch and NumPy; GPU support is optional but recommended for medical imaging workloads.

Verify before relying:

- Whether the package includes pre-trained models or requires users to train from scratch.
- Performance characteristics and typical training time for common medical imaging tasks.
- Specific medical imaging modalities (CT, MRI, ultrasound, etc.) that are best supported.

## Package facts

- License: Apache License 2.0 (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 542.8K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

medical imaging deep learning, healthcare AI framework pytorch, medical image analysis, clinical imaging workflows, biomedical deep learning toolkit, medical-imaging, healthcare-ai, pytorch-ecosystem

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