Vim & Vigor - Winter 2016 - Gwinnett Medical Center - 31
MRI
How it works: Like CT scans,
magnetic resonance imaging
(MRI) creates cross-section
images of the body, but it uses
strong magnets and radio waves
rather than radiation to create
the images.
What it's used for: Examining
organs and diagnosing torn
ligaments, tumors, metastatic
cancer, and brain and spinal
cord conditions.
What to expect: You'll lie
on a table, and markers will be
placed on your body with tape to
indicate where the images should
focus. You'll be given earplugs,
as the machine is quite loud during testing. The table will then
slide into the machine's long,
cylindrical opening. The test can
take anywhere from 30 minutes
to two hours, depending on the
images being captured. If you
have any issues with claustrophobia or an inability to lie still
for long periods, tell your doctor.
He or she may prescribe a medication to help you relax or even
order sedation.
"MRI is a good problemsolving tool," Fishman says.
"There's no radiation involved,
and it's very good for looking at
soft-tissue changes-meniscus
tears, ligamentous injuries, spine
and disk disease-as well as cardiac function, vascular issues,
and the brain and spine." ■
WHAT ABOUT
THE RADIATION?
Many people are wary of radiation exposure from
X-rays and CT scans. And exposure builds up
over time, no matter how long you go between
tests. The average chest X-ray exposes adults
to about 0.1 millisievert (mSv) of radiation.
CT scans of the chest expose adults to about
7 mSv. Experts consider radiation exposure
between 3 and 20 mSv per year to be moderate.
Exposure over 20 mSv is high. Does that mean
you should avoid X-ray tests and CT scans?
"One way to look at it is not what's the risk of
the radiation-because the amount of radiation
you'll get from most diagnostic tests is fairly
small-but what happens if you don't get the
test?" says James V. Rawson, MD, a radiologist
and the chair of the American College of
Radiology Commission on Patient- and FamilyCentered Care. "What happens if you don't have
the information you would have gotten from
the test? The small risk you're taking with the
radiation usually does not outweigh the much
larger risk of not getting the diagnosis."
WEBSITE
Lung Cancer Screening
Gwinnett Medical Center offers lowdose CT lung screenings for those at
risk of developing lung cancer. Learn
more at gwinnettmedicalcenter.org/
lungscreening.
WINTE R 2016
31
http://www.gwinnettmedicalcenter.org/lungscreening
Table of Contents for the Digital Edition of Vim & Vigor - Winter 2016 - Gwinnett Medical Center
Contents
Vim & Vigor - Winter 2016 - Gwinnett Medical Center - Cover1
Vim & Vigor - Winter 2016 - Gwinnett Medical Center - Cover2
Vim & Vigor - Winter 2016 - Gwinnett Medical Center - Contents
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Vim & Vigor - Winter 2016 - Gwinnett Medical Center - Cover3
Vim & Vigor - Winter 2016 - Gwinnett Medical Center - Cover4
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