Radiology Technology


An X-ray image is produced when a small amount of radiation passes through the body to create an image on sensitive digital plates on the other side of the body. The ability of X-rays to penetrate tissues and bones depends on the tissue's composition and mass, and the difference between these two elements creates the image. Contrast agents, such as barium, may be swallowed to outline the esophagus, stomach and intestines to help provide better images of an organ.

CT-Computed Tomography (CAT Scan)

Computed tomography, also known as a CT or CAT scan, generates a detailed images of an organ by using an X-ray beam to take images of many thin slices of that organ and joining them together to produce a single image. The source of the X-ray beam circles around the patient and the X-rays that pass through the body are detected by an array of sensors. Information from the sensors is computer processed and displayed as an image on a video screen.


Magnetic Resonance Imaging (MRI)

Magnetic resonance imaging uses radio waves and a strong magnetic field to create clear, detailed images of internal organs and tissues. Since X-rays are not used, no radiation exposure is involved. Instead, radio waves are directed at the body's protons within the magnetic field. This exam takes 30-50 minutes on average and consists of several imaging series. Most studies will require a small intravenous injection of a contrast agent that usually contains the metal Gadolinium. MRI contrast does not contain iodine, an element used in other contrast agents for X-rays or CT scans, so it may be safer for patients who are sensitive to iodine.

Ultrasound (Sonography)

High frequency sound waves are used to see inside the body. A transducer — a device that acts like a microphone and speaker — is placed in contact with the body using a special gel that helps transmit the sound. As the sound waves pass through the body, echoes are produced and bounce back to the transducer. By reading the echoes, the ultrasound can produce images that illustrate the location of a structure or abnormality, as well as provide information about its composition. Ultrasound is a painless way to examine the heart, liver, pancreas, spleen, blood vessels, breast, kidney or gallbladder, and is a crucial tool for obstetrics.

Digital Mammography

The most widely used and recognized imaging method for the detection of breast cancer is a mammogram. This low radiation X-ray often can detect abnormalities in the breast before anything can be felt. Though mammography is a very effective method for detecting breast cancer, in certain cases, additional imaging tests are needed for complete evaluation. Therefore, additional tests such as ultrasound, MRI or other diagnostic imaging may be recommended. Women over 40—or younger women with a family history of breast cancer—should have annual mammograms. Learn more about digital mammograms at Texoma Medical Center.

Stereotactic Breast Biopsy

A Stereotactic needle biopsy is a newer method used when the physician cannot feel the lump that was found on a mammogram. A Stereotactic Biopsy uses mammographic images and computer technology and combines them to determine the exact location of an abnormality to obtain a sample of breast tissue. In this way, non-surgical techniques are used to determine whether an abnormality is cancerous. This procedure is equally as accurate as surgical biopsy, without the scar and anesthetic risks of surgery.

The patient lies facedown on a special table with an opening for the breast. Using special equipment, the breast is compressed similarly to a mammogram but with less compression, and then x-rayed from several angles. The data is entered into a computer, and then a radiologist inserts a biopsy needle into the lump.

After the tissue is obtained it is examined by the pathologist and a diagnosis is made. It is important to remember that 80percent of breast biopsies result in a benign (not cancerous) finding.

Nuclear Medicine

Texoma Medical Center uses the advanced technology of nuclear medicine imaging to obtain detailed images of the body and help identify disorders and disease. Nuclear medicine offers unique diagnostic information about the function of many organs in the body and is a way to gather medical information that may otherwise be unavailable, require surgery or necessitate more expensive diagnostic tests. Nuclear medicine imaging procedures can often identify abnormalities very early in the progression of a disease, long before some medical problems are apparent with other diagnostic tests. This early detection allows a disease to be treated early in its course when there may be a more successful prognosis.

How does nuclear medicine work?

Nuclear medicine uses very small amounts of radioactive materials or radiopharmaceuticals to diagnose disease. Radiopharmaceuticals are substances that are attracted to specific organs, bones, or tissues. The radiopharmaceuticals used in nuclear medicine emit gamma rays that can be detected externally by special types of cameras: gamma or PET cameras. These cameras work in conjunction with computers to form images that provide data and information about the area of body being imaged. The amount of radiation from a nuclear medicine procedure is comparable to that received during a diagnostic X-ray.

How will the radiopharmaceutical affect me?

The radiopharmeceutical and chemical carrier are in a solution that is similar to what is naturally in your body. Therefore, side effects or reactions to it are rare. Even though the radioisotopes used in nuclear medicine procedures are inside your body, your exposure to radioactivity is low and very safe. You would receive similar radiation doses if you were undergoing X-ray procedures.

Cardiac CT Scan for Calcium Scoring

A cardiac CT scan for coronary calcium is a noninvasive way of obtaining information about the presence, location and extent of calcified plaque in the coronary arteries — the vessels that supply oxygen-containing blood to the heart muscle. Calcified plaque results when there is a build-up of fat and other substances under the inner layer of the artery. This material can calcify which signals the presence of atherosclerosis, a disease of the vessel wall, also called coronary artery disease (CAD). People with this disease have an increased risk for heart attacks. In addition, over time, progression of plaque build-up (CAD) can narrow the arteries or even close off blood flow to the heart. The result may be chest pain, also sometimes called "angina" in the chest or a heart attack.

Cardiac computed tomography (CT) for calcium scoring is an early detection tool for heart disease. The test is quick and painless. Find out more about this easy way to detect trouble with your heart.
The most widely used and recognized imaging method for the detection of breast cancer is a mammogram. This low radiation X-ray often can detect abnormalities in the breast before anything can be felt.
Radiology at Texoma Medical Center is accredited by the American College of Radiology (ACR), the largest organization of radiologists in the nation.
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For more information or to schedule an appointment, call (903) 416-4284 , or email Radiology Scheduling.

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Texoma Medical Center
5016 South US Highway 75
Denison, TX 75020
Open 24 hours a day

TMC Advanced Medical Imaging
2622 US Hwy 75 N
Sherman, TX 75090
(903) 416-3730

Hours of Operation
Monday – Friday
8:00 a.m. – 5:30 p.m.
Walk-in X-rays accepted until 5:15 p.m.

Extended Hours for MRI
Monday – Thursday until 9:00 p.m.

8:00 a.m. – noon

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American College of Radiology (ACR)

Radiology at Texoma Medical Center is accredited by the American College of Radiology (ACR), the largest organization of radiologists in the nation.
 Breast Imaging COE    

ACR Ultrasound

ACR Nuclear 

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Texoma Medical Center is owned and operated by a subsidiary of Universal Health Services, Inc. (UHS), a King of Prussia, PA-based company, that is one of the largest healthcare management companies in the nation.      

Texoma Medical Center
5016 South US Highway 75
Denison, TX 75020
(903) 416-4000

© 2016 Texoma Medical Center. All rights reserved.

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