PCA denoising

This algorithm denoising data using PCA. Code was implemeted based on the algorithm suggested by:

Veraart et al. Denoising of diffusion MRI using random matrix theory (2016). Neuroimage 142:394-406

This algorithm is the reference code that I've implemented for my PhD thesis:

Neto Henriques, R. (2018). Advanced Methods for Diffusion MRI Data Analysis and their Application to the Healthy Ageing Brain (Doctoral thesis). https://doi.org/10.17863/CAM.29356

If you use this code, please cite the two references pointed above.