Patients will be enrolled for 2 MRI visits. These visits will include an approximately 1 hour research MRI scan and a total of between 3 and 5 hours Tc-99m DTPA scan.

In each MRI visit, patients will be scanned for approximately one hour including both standard-of-care clinical sequences and research-based Advanced Diffusion Imaging sequences, on a Prisma 3T MRI scanner. Following the MRI exam or on a day not more than a week after the MRI exam, patients will undergo renal function assessment via Tc-99m DTPA scan and patient's kidneys will be scanned using a gamma camera. Proteinuria will be assessed by standard of care urinalysis of specimens collected at each MRI visit for each patient. Blood test will be performed at each visit to estimate GFR (eGFR) from measurement of serum creatinine.

Participants will undergo a 1-hour research MRI scan.

Intravoxel incoherent imaging-MRI (IVIM-MRI) data will be used to predict lesion type.

Results from the Renal Flow and Microstructure AnisotroPy-MRI (REFMAP-MRI) pre-surgical scan will be considered as predictors for either stability in renal function or incremental decline in renal function following surgery that would lead to chronic kidney disease (CKD), as defined by mGFR values and proteinuria status at follow-up.

Post-surgical renal insult will be assessed based on either mGFR decline by over 2 ml/min/1.73 m2 per year or the appearance of proteinuria.