Imaging protocol for suspected ureteric calculi in patients presenting to the emergency department.

•Review CTKUB diagnostic yields in patients presenting to the ED with loin pain.•We examine gender differences and whether haematuria is obligatory for CT investigation.•The positive scan rate in males was significantly higher than in females.•The positive rate in males without haematuria was 40.4%.•Diagnostic yields in females were low with or without haematuria.