TorchIO: A Python library for efficient loading, preprocessing, augmentation and patch-based sampling of medical images in deep learning

Highlights • Open-source Python library for preprocessing, augmentation and sampling of medical images for deep learning.• Support for 2D, 3D and 4D images such as X-ray, histopathology, CT, ultrasound and diffusion MRI.• Modular design inspired by the deep learning framework PyTorch.• Focus on reproducibility and traceability to encourage open-science practices.• Compatible with related frameworks for medical image processing with deep learning.