image resolution of fastMRI, where did you crop it

Dear author,

Thanks for the wonderful work.

How did you crop the data, the original size of fastMRI knee is (640, 368), how did you crop the size to (320,320)? I didn't find teh crop code in the mri_data.py file. Did you crop the original data and save it as the input data provided in the link.

Many thanks for your help