Résumé
Objective To probe the application value of “double low”CTU method in diagnosis of urinary system malformation in children.Methods Patients with urinary system malformation were screened by ultrasound,and renal calculi,tumor and tumor-like lesions were excluded.Double phase contrast media injection (iodixanol contrast media 270 mg I/mL)was used in one phase scan-ning,and the cortex-secretory phase images were obtained.The images were reviewed and evaluated independently by two readers. Results The coincidence rate of diagnosis was 100% with well images quality.Conclusion CTU is an important tool for the diagno-sis of urinary tract malformations in children.The “double low”method with lower radiation dose and contrast media quantity may ensure the quality of diagnosis.