People must let their technicians know if they have any form of medical implant, such as a pacemaker, insulin pump, or cochlear implant. MRI scans produce loud sounds, so people usually wear earplugs or headphones to dull the noise. Individuals with claustrophobia may find MRI scanners difficult to tolerate, although several types of open MRI scanner now exist to get around this problem.
For both CT scans and MRI scans, a doctor may recommend using a contrast dye to make the images clearer. Some people may react badly to certain types of dye. A doctor will decide which scan is appropriate based on a range of factors, such as:. MRI scans produce a more detailed image of soft tissue, ligaments, or organs. Problems that may be easier to see with an MRI scan include soft tissue damage, torn ligaments, and herniated disks.
Doctors may use a CT scan for creating a generalized image of a body part or for getting images of organs or head fractures. CT scans and MRI scans are two methods of imaging internal body parts. They have similar uses but produce pictures in different ways. A CT scan is generally good for larger areas, while an MRI scan produces a better overall image of the tissue under examination. Both have risks but are relatively safe procedures. A doctor will recommend which scan is right for a person depending on a range of factors.
A positron emission tomography, also known as a PET scan, produces 3-D color images of the processes within the human body. PET scans are often used…. A doctor may use a head and brain MRI scan to check for a range of injuries and abnormalities. MRI and CT scans have several differences, though your doctor uses both for imaging. Find out why your doctor may recommend one over the other and how they differ. What sets these scans apart is critical in choosing the right one for diagnosis.
Discover the differences and how you can prepare yourself for your next scan, whether you need an MRI or a CT. MRI stands for magnetic resonance imaging.
This imager uses radio waves and strong magnets to create a view of your bones, tissues and organs. MRI scans are ideal for getting a detailed, in-depth look at your tissues or organs.
Doctors use MRIs to diagnose several conditions including:. Before the scan, you may need a contrast agent. Sometimes, you will have one scan without the contrast dye followed by an MRI with the dye. Depending on what parts you are having scanned, you may drink the solution or have it injected into a vein. You will have earplugs or headphones to wear. The MRI machine makes a lot of noise while running.
During the scanning process, you may be required to hold your breath for specific scans. Even the slight movement of breathing can affect the results. MRIs are painless and last up to an hour , though some may take slightly more time. CT stands for computed tomography. Sometimes, these are referred to as CAT scans, which stands for computerized axial tomography. CT scans use x-rays to create multiple cross-sections of your body.
These scans are extremely popular, with 70 million performed annually in the United States. Most often, CT scans are used to look for problems in your bones, tissues, brain or other organs. Doctors typically use CT scans to identify the following conditions:. Many MRI scanners have a long, small tunnel or bore that the patient must remain in for an extended time period, which can cause severe anxiety. MRI scanners also make very loud banging or knocking noises which some patients cannot tolerate.
Answer posted on 7 September The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. The information provided is not a substitute for professional advice and should not be relied upon in the absence of such professional advice. To the best of our knowledge, answers are correct at the time they are posted. An X-ray , also called a radiograph, sends radiation through the body.
Areas with high levels of calcium bones and teeth block the radiation, causing them to appear white on the image. Soft tissues allow the radiation to pass through. They appear gray or black on the image. An X-ray is the fastest and most accessible form of imaging. An X-ray exam only takes a few minutes to complete. However, even if your doctor suspects a soft tissue injury like a tendon tear, an X-ray might be ordered to rule out a fracture.
An MRI , or magnetic resonance imaging, uses a powerful magnet to pass radio waves through the body.
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