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CH. 4

Radiation Biology

TermDefinition
When x-rays photons are absorbed by water in cells its called free radical formation then turns into toxins
Ionization injury electrons absorbed by patient tissue breaking all molecular bonds
Latent period is time between exposure to x-radiation and clinical symptoms
Free radical uncharged molecule, unpaired electrons in outer shell, highly reactive/ unstable and combines with molecules to form toxins
Direct injury occurs when x-ray photons cut critical targets in cells
Indirect radiation injury occurs when x-ray photons are absorbed and form toxins
Factors that contribute to radiation injury dose, dose rate, cell sensitivity, age
Genetic radiation affect injury's not seen in person exposed but occur in future generations
Most prone to radiation small lymphocyte
Sensitivity of tissues to radiation is determined by mitotic activity, cell differentiation, cell metabolism
Mature bone cells are considered radio resistant
The roentgen unit unit for measuring x-rays exposure in air (only used for x-rays)
The REM radiation unit determined by quality factor
The RAD unit for measuring absorption of x-rays
SI equivalent measures amount of radiation absorbed during dental x-rays (grey)
Average dose of background radiation received by people in the USA 150-300 MRADS
Greatest contributor to artificial radiation exposure medical radiation
amount of radiation exposure in an individual varies depending on film, speed, collimation, technique, exposure factors
Created by: user-1888637
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