Inclusion Criteria:  Inclusion criteria for patients :  Patients undergoing treatment for a stone(s) located in the kidney less than 2 cm Radiopaque stone Able and willing to give informed consent  Inclusion criteria for Healthy volunteers  No history of kidney or stone disease Asymptomatic No indwelling ureteral stent Willing to provide medical history information Able and willing to give informed consent  Exclusion Criteria:  Exclusion criteria for patients  Active urinary tract infection Bleeding disorder Chronic renal failure (eGFR<30) Ureteral stone