The Application of Magnetic Resonance Urography in Urinary Tract Obstructive Lesions

Objective: To study the application of magnetic resonance urography(MRU) in urinary tract obstruction,and it's characteristics and value of assessment on urinary tract obstruction.Methods: 57 patients with urinary tract obstruction lesions confirmed by gravel or cases were collected,by using Philips Achieva 1.5 T superconducting double gradient magnetic resonance scanner,supine head first,Sense-Body coil,first axial and coronal T2WI FSE sequences with respiratory gating and SE T1WI sequence with respiratory gating were underwent on them,MRU through using fast spin echo sequences of T2-weighted coronal re-water imaging,and three-dimensional maximum intensity projection reconstruction on workstation,the urography images were obtained,and contrast to surgery or case study.Results: 57 pantients with MRU examinations were undewent,found 20 urinary stricture,22 urinary calculi,5 primary tumors of urinary system,4 urinary tract abnormalities,3 primary giant urinary tract,3 urinary ectopic vascular compression department.the location diagnosis accuracy of MRU in urinary tract obstruction was 100%,qualitative diagnostic accuracy was 87.7%.Conclusion: The location and qualitative diagnostic accuracy of MRU in urinary tract obstruction was high,to the further,combined the clinical and comprehensive experience.