Contrast-agnostic registration with deep learning

This tutorial will demonstrate how to coregister two images together that have different contrasts using deep learning. The algorithm is based on [SynthMorph](https://arxiv.org/pdf/2004.10282.pdf). More details of its implementation in SCT can be found [here](https://github.com/ivadomed/multimodal-registration).

• Before starting this tutorial
• Preprocessing steps to highlight the spinal cord (T2w)
• Preprocessing steps to highlight the spinal cord (T1w)
• Coregistering T1w with T2w