NiftyNet: a deep-learning platform for medical imaging. NiftyNet is a TensorFlow-based open-source convolutional neural networks platform for research in medical image analysis and image-guided therapy. NiftyNet’s modular structure is designed for sharing networks and pre-trained models. NiftyNet is a consortium of research organisations (BMEIS – School of Biomedical Engineering and Imaging Sciences, King’s College London; WEISS – Wellcome EPSRC Centre for Interventional and Surgical Sciences, UCL; CMIC – Centre for Medical Image Computing, UCL; HIG – High-dimensional Imaging Group, UCL), where BMEIS acts as the consortium lead.