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CT Angiography (CTA)https://www.radiologyinfo.org/en/info.cfm?pg=angioct 1 Introduction Computed tomography angiography (CTA) uses an injection of contrast material into your blood vessels and CT scanning to help diagnose and evaluate blood vessel disease or related conditions, such as aneurysms or blockages. CTA is typically performed in a radiology department or an outpatient imaging center. Tell your doctor if there is a possibility you are pregnant and discuss any recent illnesses, medical conditions, medications you are taking, and allergies. You will be instructed not to eat or drink anything several hours beforehand. If you have a known allergy to contrast material, your doctor may prescribe medications to take before the CTA exam to reduce the risk of an allergic reaction. Leave jewelry at home and wear loose, comfortable clothing. You may be asked to wear a gown. If you are breastfeeding, talk to your doctor about how to proceed. List of words
2 What is CT Angiography?Doctors use angiography to diagnose and treat blood vessel diseases and conditions. Angiography exams produce pictures of major blood vessels throughout the body. In some cases, contrast material is used. Doctors perform angiography using: x-rays with catheters computed tomography (CT) magnetic resonance imaging (MRI) CT angiography uses a CT scanner to produce detailed images of both blood vessels and tissues in various parts of the body. During the exam, contrast material is injected through a small catheter placed in a vein of the arm. A radiologic technologist will capture high-resolution CT images while the contrast material flows through the blood vessels.
3 What are some common uses of the procedure?CT angiography is helpful in examining blood vessels and the organs supplied by them in various body parts, including: brain neck heart chest abdomen (such as the kidneys and liver) pelvis legs and feet arms and hands Physicians use CT angiography to diagnose and evaluate many diseases of blood vessels and related conditions such as: aneurysms blockages blood clots congenital (birth-related) abnormalities of the cardiovascular system, including the heart disorganized blood vessels, such as vascular malformations injury tumors vessel rupture or tears Also, physicians use CT angiography to check blood vessels following surgery, such as: identify abnormalities, such as aneurysms, in the aorta, both in the chest and abdomen, or in other arteries. detect atherosclerotic (plaque) disease in the carotid artery of the neck, which may limit blood flow to the brain and cause a stroke. identify a small aneurysm or arteriovenous malformation (AVM)—an abnormal connection between blood vessels—inside the brain or elsewhere. detect plaque disease that has narrowed the arteries to the legs and help prepare for endovascular intervention or surgery. detect disease in the arteries to the kidneys or visualize blood flow to help prepare for a kidney transplant or stent placement. guide interventional radiologists and surgeons making repairs to diseased blood vessels, such as implanting stents or evaluating a stent after implantation. detect injury to one or more arteries in the neck, chest, abdomen, pelvis or limbs after trauma. evaluate arteries feeding a tumor prior to surgery or other procedures such as chemoembolization or selective internal radiation therapy. identify dissection or splitting in the aorta in the chest or abdomen or its major branches. show the extent and severity of coronary artery disease and its effects and plan for an intervention, such as a coronary bypass and stenting. examine pulmonary arteries in the lungs to detect pulmonary embolism (blood clots, such as those traveling from leg veins) or pulmonary AVMs. look at congenital abnormalities in blood vessels, especially arteries in children (e.g., malformations in the heart or other blood vessels due to congenital heart disease). evaluate stenosis and obstructions of vessels.
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