CT angiography

CT angiography refers to rapid injection of a contrast agent from the vein of the subject, through the blood circulation of the human body, scanning in the time when the contrast agent concentration reaches the highest peak in the blood vessels (arteries and veins), and reconstructed by post-processing of the workstation. A three-dimensional image of the blood vessel. CT angiography can simultaneously display intravascular, extraluminal and vascular wall lesions, which can achieve large-scale vascular imaging and fine imaging of small branches of small blood vessels, and even achieve vascular imaging of moving organs such as the heart. Basic Information Specialist Category: Cardiovascular Examination Category: CT Applicable gender: whether men and women apply fasting: not fasting Tips: For patients undergoing CT examination, metal objects in the inspection area should be removed to reduce artifacts. Normal value There were no lesions and abnormalities in the angiography. Clinical significance Abnormal results CT angiography clearly shows the relationship between vascular lesions of various organs in the body and surrounding tissues. Patients with vascular disease who need to be examined. Precautions Contraindications before examination: Patients undergoing CT examination should remove metal objects from the inspection area to reduce artifacts. Requirements for inspection: Actively cooperate with the doctor's work. Inspection process Quickly inject a contrast agent from the vein of the subject, scan through the blood circulation of the human body, scan the time when the contrast agent concentration reaches the highest peak in the blood vessels (arteries and veins), and reconstruct the three-dimensional volume of the blood vessel through post-processing of the workstation. image. Not suitable for the crowd Inappropriate crowd: First, patients who are allergic to contrast agents. Second, intracranial intraspinal tumors, aneurysms, vascular malformations and infections. Third, there is a history of epilepsy. Fourth, heart, lung, liver, kidney dysfunction. Five, malignant tumor caused by hungry state, hypoproteinemia, water and electrolyte imbalance. Sixth, infants and elderly patients over 60 years old. Seven, diabetes, hyperthyroidism, eosinophilic patients. Eight, some special scanners (such as dynamic scanning of various parts, liver dual-phase / three-phase scanning, CT angiography, etc.).