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Radiol Clin North Am. 1999 Sep;37(5):911-52, v.

Helical CT of urinary tract stones. Epidemiology, origin, pathophysiology, diagnosis, and management.

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Department of Diagnostic Imaging, Yale University School of Medicine, New Haven, Connecticut, USA.


Urolithiasis is a common medical problem. The diagnosis of this entity in the setting of acute flank pain presents an interesting challenge to the radiologist. Unenhanced helical CT has recently entered the fray and has quickly become the imaging study of choice when evaluating patients with acute flank pain and suspected ureterolithiasis. The nature and origin of ureteral stones and the pathophysiology of ureteral obstruction provide a basis for understanding the imaging findings in these patients.

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