Although the images could be improved by adjusting the depth and gain, there is no aortic aneurysm.

AAA is an important differential for renal colic. History (e.g. previous Hx of stones) and examination (?pulsatile mass) can help, but ultrasound can usually rapidly exclude the diagnosis with more certainty. Other differentials for abdominal pain should be considered but if the clinical picture is typical of renal colic (flank pain, haematuria, etc.) and no ‘red flags’ (fever, single kidney, worsening renal function) then CT KUB can be arranged non-urgently or omitted (typical picture in patient with history of recurrent stones) Local protocols vary on which renal colic patients may not require any imaging.