الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Spiral computed tomography (CT) has significantly improved imaging of renal masses by decreasing volume averaging artifacts and respiratory misregistration artifacts and allowing image acquisition during optimal contrast enhancement. Further advances, the recent introduction of multidetector CT (MDCT) into clinical practice have allowed radiologists to overcome most of the limitations of single-detector helical CT. In particular, the very thin-slice collimation, the high speed of acquisition, and the near isotropy of the voxels allow the reformatting of images in any plane without significant artifacts and with excellent anatomic detail.
Three main 3D visualization techniques were currently used in our thesis: multiplanar reformation (MPR), maximum intensity projection (MIP) and volume rendering technique (VRT).
This study aimed to assess the rule of multidetector CT in charactrization of the renal cell carcinoma.
Seventin pateints 7 females and 10 males ranged in ages from21 to 69 years were enrolled in this prospective study.all patients were referred for evaluation of renal tumor by MDCT Multiphasic kidney technique for characterization of the renal cell carcinoma.
All patient were subjected to the following:
• Thorough history taking and clinical examination to determine symptoms and signs related to the tumor.
• Routine laboratory investigations including serum urea and creatinine.
• The previous imaging modalities including plain KUB, ultrasongraphy, IVU, and CT were checked.
• Full explanation of the CT procedure and its possible complications, and obtaining informed consent
• Multidetector CT renal multiphasic study with subsequent post processing and 3D reconstruction.
All masses were pathologically proven as renal cell carcinoma and matched with our CT.
Our results showed that 6 had renal cell carcinoma on the right side,10 on the left side and one were bilateral.
The result of this thesis estimated that 15 patients (82.35%) with clear celll renal cell carcinoma and two patients (11.76%) with papillary renal cell carcinoma. One of these patients had bilateral papillary renal cell carcinoma. Two patienst (11.1%) had paraaortic lymph .Three patients (17.64%) with distant metastases mainly to the lung base , and suprarenal liver. Six patients (33.3%) had perinephric extension.
Multidetector CT has dramatically refined the diagnostic evaluation of renal cell carcinoma and its character with a safe reliable imaging modality and decrease the surgical complication as it has high accuracy in detecting the perinephric extension, also characterize size, site and vascular invasion as well.