1. CT Scan Is No More Accurate than Ultrasound to Detect Kidney Stones UCSF Study Leader Recommends Change in Standard Practice By Jeffrey Norris on September 17, 2014. https://www.ucsf.edu/news/2014/09/117246/ct-scan-no-more-accurate-ultrasound-detect-kidney-stones
2. Ultrasonography versus computed tomography for suspected nephrolithiasis rebecca;Smith-Bindman;N Engl J Med,2014
3. Detection rate of ultrasound vs CT scan in clinical staging accuracy of renal tumors pT1NxMx;Dachille;Arch Ital Urol Androl,2005
4. Standardizing patient outcomes measurement;Porter;N Engl J Med,2016
5. Bret P. Nelson, Vicki E. Noble Ultrasound in Medical Practice. Cambridge Medicine https://cambridgemedicine.wordpress.com/2011/06/28/ultrasound-in-medical-practice/; June 28, 2011