Non Surgical?

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Non Surgical?

by Goodbook on Sat Dec 23, 2017 11:31 AM

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THANKS to advances in computers, mathematics, and science, the scalpel is giving way to nonsurgical tools in the diagnosis of certain diseases. Besides X-ray imaging, now over 100 years old, the technologies include computed tomography (CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), and ultrasound imaging, or sonography.* How do these techniques work? What are their health risks? And what are their advantages? X-ray Radiography How does it work? X-rays have a shorter wavelength than visible light and can penetrate body tissues. When a certain part of the body is x-rayed, dense tissues, such as bones, absorb the rays and appear as bright areas on the developed film, called a radiograph. Soft tissues appear in shades of gray. X-rays are commonly used to diagnose problems or disease involving teeth, bones, breasts, and the chest. To distinguish between adjacent soft tissues of the same density, a doctor may inject a radiopaque dye into the patient’s bloodstream to enhance the contrast. Nowadays, X-rays are often digitized and viewed on a computer screen. Risks: There is a slight chance of damage to cells and tissues, but the risk is usually very low compared with the benefits.* Women who may be pregnant should inform their doctor before they submit to an X-ray. Contrast agents, such as iodine, may cause allergic reactions. So inform your doctor or technician if you have any allergies to iodine or to seafood, which contains this element. Benefits: X-ray imaging is fast, generally painless, relatively inexpensive, and quite easy to perform. Hence, it is particularly useful in such areas as mammography and emergency diagnosis. No radiation remains in the body after the X-ray is administered, and usually there are no side effects.*
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