Prospective single centre study aiming at validating a conditional imaging strategy for
diagnosis of suspected kidney stone.
Consecutive Emergency department patients referred to the medical imaging department for
exploration of a suspected acute uncomplicated renal colic will undergo the following
interventions : systematic plain abdominal Xray, systematic ultrasonography and systematic
unenhanced CT (with a reduced dose scan), in addition to clinical examination and assessment
of body mass index and the Sex, Timing, Origin, Nausea, Erythrocytes (STONE) clinical
prediction score for symptomatic stone.
Patients will be followed up at 1 month to record the need for urologic intervention and its
The performances of different conditional imaging strategy for the diagnosis of suspected
renal colic will be assessed retrospectively. The conditional strategies tested will be based
on the patient's stone score and BMI and targeted use of combined plain X-ray and
ultrasonography and/or unenhanced CT.
The reference diagnosis for renal colic will be made according to the finding of a ureteral
stone or indirect signs of urolithiasis at unenhanced CT.