الفهرس | Only 14 pages are availabe for public view |
Abstract Summary The portal vein is formed by the junction of the splenic vein with higher oxygen saturation and the superior mesenteric vein with digestive products. It is divided to right main portal vein and left main portal vein, multiple variations are detected, and trifurcation of portal vein is the most common. The intraportal and intrahepatic distribution of the blood flow from each vein to the portal vein has been evaluated by several imaging modalities Ultrasound, CT and conventional contrast MRI. Both CT and MR contrast agents have a risk of contrast-medium– induced nephropathy and have various side effects, including rare but lethal reactions such as anaphylactic shock and nephrogenic systemic fibrosis consequently, these contrast agents should not be administered to patients with decreased renal function. Recent development of high-performance gradient MR systems allows the clinical use of unenhanced MR angiography techniques with high quality for portal flow imaging. RT-SSFP (respiratory triggered steady state free precision & inversion recovery pulse) has the ability to demonstrate portal venous flow as high signal intensity without the use of gadolinium-based contrast agent this is beneficial for patients who will undergo surgical procedures such as hepatic transplantation. The aim of this study is to delineate portal vein anatomy, portal vein variations and assess the ability of RT-SSFP to reveal different portal vein pathological conditions. This study was conducted over 24 hepatic patients with different portal vein pathological conditions including portal vein thrombosis either complete or partial thrombosis, portal hypertension and cavernous |