الفهرس 
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Abstract
patients with oesophageal varices were examined by colour coded Doppler imaging (CCDI) aiming at evaluating its role in assessment of the portal venous anatomy and portal haemo in these patients. Angiographic correlations were assessed in 140 patients. Only in 40 patients MR angiography was carried out for comparison. Over a follow-uP period of one year, re-examinations by CCDI and angiography were done in 80 patients who different therapeutic modalities were performed. Comparison between the pre and post therapy results was done as regards the portal haemodynamics as well as the shunt status if Colour coded Doppler imaging (CCDI) proved itself as a good method for assessment of patients with oesophageal varices. It can be performed easily and safely in the out patient clinics. It is superior to angiography in determining the flow pattern and direction. Its high negative predictive value enables the exclusion of portal vein thrombosis (PVT). However, sluggish or static flow in the portal venouS system can mimic anechoic clot. Hence, CCDI is good negative but not good positive in diagnosis of PVT. The acoustic access to some regions of the abdomen may be limited by gases, patient habitus or by severely shrunken liver. occasionally, dilated col laterals in certain locations may escape detection by CCDI. CCDI can not be used in grading of the hepatic portal perfusion. Difficulties might be encountered in adjustment of the angle of insonation or during examination of ill patients with inability to hold respiration for reasonable time.