Radiation Risks: Diagnostic Imaging Procedures VS Environmental Exposure
RADIATION RISKS: Diagnostic Imaging Procedures VS Environmental Exposure NATURAL BACKGROUND RADIATION We are all exposed to ionizing radiation from natural sources at all times. This radiation is called natural background radiation, and its main sources are the following: Cosmic rays from outer space which bombard the earth Radioactive substances Emanation of radioactive Trace amounts of in the earth's crust gas from the earth radioactivity in the body COMPUTED TOMOGRAPHY (CT) APPROXIMATE EFFECTIVE RADIATION DOSE NATURAL BACKGROUND ABDOMEN + PELVIS RADIATION EQUIVALENT 10 msv 3 years COMPUTED TOMOGRAPHY (CT) HEAD 2 msv 8 months COMPUTED TOMOGRAPHY (CT) CHEST 7 msv 2 years RADIOGRAPHY (X-RAY) CHEST 0.1 msv 10 days INTRAVENOUS PYELOGRAM (IVP) 3 msv 1 year RADIOGRAPHY (X-RAY) UPPER GI-TRACT 6 msv 2 years RADIOGRAPHY (X-RAY) SPINE 1.5 msv 6 months RADIOGRAPHY (X-RAY) MAMMOGRAPHY 0.4 msv 7 weeks
Radiation Risks: Diagnostic Imaging Procedures VS Environmental Exposure
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