Radiation

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The dictionary definition of radiation is as follows:
“the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.”

Your body is exposed to radiation whenever you have an X-RAY or a CAT SCAN. MRI’s do not emit any radiation as they use magnets.

Here is a great radiation calculator

X-RAYS are forms of radiant energy. Unlike light, radiation can penetrate your body, which allows the XRAY technologist to capture images inside of your body.

The scientific unit of measurement (UOM) for radiation is the millisievert (mSv). Others include rad, rem, sievert, gray and roentgen

 

For this procedure: * An adult’s approximate effective radiation dose is: Comparable to natural background radiation for:
ABDOMINAL REGION:
Computed Tomography (CT)-Abdomen and Pelvis 10 mSv 3 years
Computed Tomography (CT)-Abdomen and Pelvis, repeated with and without contrast material 20 mSv 7 years
Computed Tomography (CT)-Colonography 6 mSv 2 years
Intravenous Pyelogram (IVP) 3 mSv 1 year
Radiography (X-ray)-Lower GI Tract 8 mSv 3 years
Radiography (X-ray)-Upper GI Tract 6 mSv 2 years
BONE:
Radiography (X-ray)-Spine 1.5 mSv 6 months
Radiography (X-ray)-Extremity 0.001 mSv 3 hours
CENTRAL NERVOUS SYSTEM:
Computed Tomography (CT)-Head 2 mSv 8 months
Computed Tomography (CT)-Head, repeated with and without contrast material 4 mSv 16 months
Computed Tomography (CT)-Spine 6 mSv 2 years
CHEST:
Computed Tomography (CT)-Chest 7 mSv 2 years
Computed Tomography (CT)-Lung Cancer Screening 1.5 mSv 6 months
Radiography-Chest 0.1 mSv 10 days
DENTAL:
Intraoral X-ray 0.005 mSv 1 day
HEART:
Coronary Computed Tomography Angiography (CTA) 12 mSv 4 years
Cardiac CT for Calcium Scoring 3 mSv 1 year
MEN’S IMAGING:
Bone Densitometry (DEXA) 0.001 mSv 3 hours
NUCLEAR MEDICINE:
Positron Emission Tomography – Computed Tomography (PET/CT) 25 mSv 8 years
WOMEN’S IMAGING:
Bone Densitometry (DEXA) 0.001 mSv 3 hours
Mammography 0.4 mSv 7 weeks
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