===Choice of exam===
*'''[[Ultrasonography of the urinary system]]''' is the first-line imaging modality for patients <14 years of age and those who are pregnant. It is also the first-line investigation for thin (BMI <30) patients and there is a strong suspicion of kidney stone disease.
*'''[[Abdominal CT]] ''' is recommended for older patients, as well as those who have higher BMI and/or less specific findings.<ref name="BrisbaneBailey2016"/>
==Evaluation==