Unenhanced computed tomography (CT) is currently being widely used for the evaluation of patients presenting with acute flank pain. A variety of primary and secondary findings detected on unenhanced CT contribute not only to the diagnosis but also to the treatment plan. This review includes primary and secondary multidetector CT imaging findings of urinary stone disease, potential pitfalls with exquisite images of sample cases, and a brief review of radiation dose reduction and contrast administration strategies.

Keywords: urinary tract stones , computed tomography, flank pain