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CT - Safety

QuestionAnswer
attenuation reduction of intensity of radiation beam as it passes through a substance depends of beam quality (photon energy) and the density of tissue
photoelectric absorption energy of incoming x-ray photon is completely absorbed through ionization of an inner shell electron
compton scattering x-ray photon interact with atoms outer shell electron, a transfer of energy ejects the outer shell electron causing ionization, causing loss of energy or x-ray photon and change of direction
what is the filtration within the CT x-ray tube 6 and 9mm aluminum (AL)
what is the purpose of filtration to remove unwanted and low quality photons from the x-ray beam reduces patient dose
absorbed dose measured in grays (Gy) amount of x-rays absorbed in unit of mass
effective dose (Efd) measured in sieverts (Sv) type of tissue that radiation is deposited in
CT dose index (CTDI) measured in milligrays (mGy) measures the dose received in a single CT slice
CT dose index vol (CTCIvol) measures the radiation dose obtained in each section during a helical scan
Created by: mkopp1
 

 



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