|
Department of Radiology
 |
WVU Hospital Radiology |
 |
CT
|
Patient Instructions:
To schedule a CT scan please contact (304) 598-4250. Please contact the CT personnel at (304) 598-4250 if you need specific instructions for a scheduled scan.
CT Scanning of the Body:
CT scanning—sometimes called CAT scanning—is a noninvasive, painless medical test that helps physicians diagnose and treat medical conditions.
CT imaging uses special x-ray equipment to produce multiple images or pictures of the inside of the body and a computer to join them together in cross-sectional views of the area being studied. The images can then be examined on a computer monitor or printed.
CT scans of internal organs, bone, soft tissue and blood vessels provide greater clarity than conventional x-ray exams.
Using specialized equipment and expertise to create and interpret CT scans of the body, radiologists can more easily diagnose problems such as cancers, cardiovascular disease, infectious disease, trauma and musculoskeletal disorders.
Physicians often use the CT examination to:
- plan and properly administer radiation treatments for tumors
- guide biopsies and other minimally invasive procedures
- plan surgery
- measure bone mineral density for the detection of osteoporosis
- quickly identify injuries to the liver, spleen, kidneys or other internal organs in cases of trauma
- from the website of the Radiological Society of North America
What is CT Scanning of the Head?
Two different views of CT brain angiogram reveal an aneurysm (arrows) arising from the basilar artery. CT scanning—sometimes called CAT scanning—is a noninvasive, painless medical test that helps physicians diagnose and treat medical conditions.
CT imaging uses special x-ray equipment to produce multiple images or pictures of the inside of the body and a computer to join them together in cross-sectional views of the area being studied. The images can then be examined on a computer monitor or printed.
CT scans of internal organs, bone, soft tissue and blood vessels provide greater clarity than conventional x-ray exams.
This information has been provided for your convenience from the Radiological society of North America patient information website.
For more information please see: http://www.radiologyinfo.org/en/sitemap/
CT Scanning of the Head
CT scanning provides more detailed information on head injuries, stroke, brain tumors and other brain diseases than regular radiographs (x-rays).
What are some common uses of the procedure?
CT scanning of the head is typically used to detect:
- bleeding, brain damage and skull fractures in patients with head injuries
- bleeding caused by a ruptured or leaking aneurysm in a patient with a sudden severe headache
- a blood clot or bleeding within the brain shortly after a patient exhibits symptoms of a stroke
- a stroke, especially with a new technique called Perfusion CT
- brain tumors
- enlarged brain cavities (ventricles) in patients with hydrocephalus
- diseases or malformations of the skull
CT scanning is also performed to:
- evaluate the extent of bone and soft tissue damage in patients with facial trauma, and planning surgical reconstruction
- diagnose diseases of the temporal bone on the side of the skull, which may be causing hearing problems
- determine whether inflammation or other changes are present in the paranasal sinuses
- plan radiation therapy for cancer of the brain or other tissues
- guide the passage of a needle used to obtain a tissue sample (biopsy) from the brain
- assess aneurysms or arteriovenous malformations through a technique called CT angiography.
For more information, see the CT Angiography page. This information has been provided for your convenience from the Radiological society of North America patient information website. For more information please see: http://www.radiologyinfo.org/en/sitemap/
CT Angiography
CT (computed tomography) angiography (CTA) is an examination that uses x-rays to visualize blood flow in arterial and venous vessels throughout the body, from arteries serving the brain to those bringing blood to the lungs, kidneys, and arms and legs. CT combines the use of x-rays with computerized analysis of the images. Beams of x-rays are passed from a rotating device through the area of interest in the patient's body from several different angles to create cross-sectional images, which then are assembled by computer into a three-dimensional picture of the area being studied. Compared to catheter angiography, which involves placing a sizable catheter and injecting contrast material into a large artery or vein, CTA is a much less invasive and more patient-friendly procedure—contrast material is injected into a small peripheral vein by using a small needle or catheter. This type of exam has been used to screen large numbers of individuals for arterial disease. Most patients undergo CT angiography without being admitted to a hospital. What are some common uses of the procedure?
A reformatted image of the lumbar spine and abdominal aorta looking from the side. The front of the abdomen is to the left and the patient's back is to the right of the image.CTA is commonly used to:
- Examine the pulmonary arteries in the lungs to rule out pulmonary embolism, a serious but treatable condition.
- Visualize blood flow in the renal arteries (those supplying the kidneys) in patients with high blood pressure and those suspected of having kidney disorders. Narrowing (stenosis) of a renal artery is a cause of high blood pressure (hypertension) in some patients and can be corrected. A special computerized method of viewing the images makes renal CT angiography a very accurate examination. Also done in prospective kidney donors.
- Identify aneurysms in the aorta or in other major blood vessels. Aneurysms are diseased areas of a weakened blood vessel wall that bulges out—like a bulge in a tire. Aneurysms are life-threatening because they can rupture.
- Identify dissection in the aorta or its major branches. Dissection means that the layers of the artery wall peel away from each other—like the layers of an onion. Dissection can cause pain and can be life-threatening.
- Identify a small aneurysm or arteriovenous malformation inside the brain that can be life-threatening.
- Detect atherosclerotic disease that has narrowed the arteries to the legs.
- Detect thrombosis (clots) in veins, for example large veins in the pelvis and legs. Such clots can travel to the lungs and result in pulmonary embolism. 3-dimensional view of the abdominal aorta made with a CT angiogram. All surrounding structures are digitally erased. The main branches of the aorta going to the intestines, kidneys and legs are visible. This view is from the front of the patient.
CTA is also used to detect narrowing or obstruction of arteries in the pelvis and in the carotid arteries, that bring blood from the heart to the brain. When a stent has been placed to restore blood flow in a diseased artery, CTA will show whether it is serving its purpose. Examining arteries in the brain may help reach a correct diagnosis in patients who complain of headaches, dizziness, ringing in the ears or fainting. Injured patients may benefit from CTA if there is a possibility that one or more arteries have been damaged. In patients with a tumor, it may be helpful for the surgeon to know the details of arteries feeding the growth.
This information has been provided for your convenience from the Radiological society of North America patient information website.
For more information please see: http://www.radiologyinfo.org/en/sitemap/
Return to top
Cardiac CT for Calcium Scoring
CT of the coronary artery: normal image and abnormal image with calcium in the artery.
CT scanning—sometimes called CAT scanning—is a noninvasive, painless medical test that helps physicians diagnose and treat medical conditions.
CT imaging uses special x-ray equipment to produce multiple images or pictures of the inside of the body and a computer to join them together in cross-sectional views of the area being studied. The images can then be examined on a computer monitor or printed.
CT scans of internal organs, bone, soft tissue and blood vessels provide greater clarity than conventional x-ray exams.
A cardiac CT scan is a non-invasive way of obtaining information about the location and extent of calcified plaque in the coronary arteries—the vessels that supply oxygen-containing blood to the heart wall. Plaque is a build-up of fat and other substances, including calcium, which can, over time, narrow the arteries or even close off blood flow to the heart. The result may be painful angina in the chest or a heart attack.
Because calcium is a marker of coronary artery disease, the amount of calcium detected on a cardiac CT scan is a helpful diagnostic tool. The findings on cardiac CT are expressed as a calcium score. Another name for this test is coronary artery calcium scoring. What are some common uses of the procedure?
The goal of cardiac CT for calcium scoring is to detect coronary artery disease (CAD) at an early stage when there are no symptoms and to determine its severity. It is a screening study that may be recommended by a physician for patients with risk factors for CAD but no clinical symptoms. The procedure is most often suggested for men aged 45 years or older and for women who are aged 55 and above or who are postmenopausal. Some patients choose to have the test on their own even if their doctors have not recommended it, in order to detect early-stage CAD.
The major risk factors for CAD, other than age, are:
- abnormally high blood cholesterol levels
- a family history of heart disease
- diabetes
- high blood pressure
- cigarette smoking
- being overweight or obese
- being physically inactive
Return to top
|