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9 Terms
what kind of radiation are x-rays?
-electromagnetic
which (2) electromagnetic radiations are used in medical imaging?
-xrays
-gamma rays
free radical damage effect?
-breaks chemical bonds
What do x-rays and gamma cause in the body?
– Ionization in atoms
Modalities:
Emit ionizing radiation (5)
– Radiography
– Radiography – contrast studies
– Fluoroscopy
– Computed tomography (CT)
– Scintigraphy
general:
how are xrays made?
-xrays passed through pt to digital detector which records the digital image and sends it to a computer
why is bone whiter under xray?
-absorbs more x-rays
-fewer x-rays pass thru
why is gas (or organs like intestines) less white?
-more xrays pass thru
-less absorption
