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GENITOURINARY IMAGING Table of Contents   
Year : 2004  |  Volume : 14  |  Issue : 3  |  Page : 285-290
Dual-phase helical CT of kidney : Comparison of corticomedullary and nephrographic phases in detection and characterization of renal masses


Department of Radio Diagnosis and Imaging, Kasturba Medical College and Hospital, Manipal-576104, India

Correspondence Address:
C M Shetty
Department of Radio Diagnosis and Imaging, Kasturba Medical College and Hospital, Manipal-576104
India
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Source of Support: None, Conflict of Interest: None


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OBJECTIVES : To evaluate the role of dual phase helical CT in the detection and characterization of renal masses. MATERIALS AND METHODS : A prospective study of twenty two patients was undertaken with CT to characterize indeterminate renal masses. Inall patients, five mm thick contiguous sections were obtained from the kidneys before and after injection of intravenous contrast material in corticomedullary and nephrographic phases. RESULTS : Renal neoplasms and normal renal cortex showed significantlygreater enhancement in the nephrographic phase compared with that in corticomedullary phase (p= 0.01). Renal veins are best visualised in corticomedullary phase and inferior vena cava is better visualized in nephrographic phase. CONCLUSION : Conspicuity of renal neoplasms is better in nephrographic phase compared to corticomedullary phase. Renal veins are best visualised in corticomedullary phase and inferior vena cava is better visualized in nephrographic phase. If dedicated renal CT is requested for a suspected renal mass, the helical scan series to be obtained are unenhanced, corticomedullary and nephrographic phase images.


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