This study aims to learn ways to improve the way MRI scans are done to make them more accurate and easier for patients, particularly by using a method that allows them to breathe normally during the scan. 

We also hope to learn ways to improve our understanding of kidney disease. This could lead to better diagnostic tools, more effective treatments, and a deeper insight into kidney function and failure, ultimately benefiting future patients. 

Participants will be asked to undergo up to two MRI scans without contrast. The MRI scanner will take cross-section pictures of the abdomen using magnetic fields, radio waves, and copper wires. After a break, participants will be asked to walk (<10 min) to a different imaging facility at Weill Cornell Medicine to undergo an identical imaging procedure.