The invention relates to an 
imaging agent, and in particular relates to an 
imaging agent for gastrointestinal B-ultrasonic examination. The 
imaging agent is prepared from the following raw materials: 20 grams of largehead atractylodes 
rhizome, 15 grams of 
cyperus rotundus, 20 grams of 
officinal magnolia bark, 20 grams of 
tangerine peel, 20 grams of white paeony root, 10 grams of medicated leaven, 10 grams of 
cinnamon bark, 10 grams of orange Jessamine, 10 grams of shinyleaf pricklyash root, 6 grams of bitter orange, 8 grams of Chinese thorowax root, 10 grams of medicinal evodia fruit, 10 grams of yam, 5 grams of 
liquid paraffin, 2 grams of fatty methyl ester ethoxylate, 2 grams of tween 80, 1 
gram of 
didecyldimethylammonium chloride, 5 grams of glycerin and 1 
gram of 
allantoin. The imaging agent has the effects of promoting the circulation of qi for deswelling and regulating qi-flowing for harmonizing 
stomach, bubbles in 
stomach and intestines are rapidly removed, gastrointestinal 
motility is promoted, gastrointestinal 
mucus is eliminated, echo dark areas in gastral cavity are eliminated, the interference of 
acoustic impedance to gastrointestinal B-ultrasonic diagnosis is eliminated, the definition of gastrointestinal B-ultrasonic examination is improved, the structure of each layer of gastric walls is definite, lesions are highlighted, and the probabilities of 
missed diagnosis and misdiagnosis are reduced.