Radiology Chapter 4 Questions Graded A+ 2025/2026
What contributes to radiation injury - Total dose,dose rate,cell sensitivity and age
Long term effects are seen with? - Small amounts of radiation absorbed in a long period
Radiation injuries that are not seen in the person irradiated but that occur in future
generations are termed - Genetic effects
What is most susceptible to ionizing radiation - Small lymphocyte
The sensitivity of tissues to radiation is determined by - Mitotic activity,cell differention
and cell metabolism
What is considered radioresistant - Mature bone cells
An organ that if damaged, disminishes the quality of an individual's life is termed a -
Critical organ
The traditional unit for measuring x-Ray exposure in air is termed - The roentgen
Which radiation units is determined by the quality factor - The rem
The unit for measuring the absorption of x-rays is termed - The rad
1r= - 2.58*10c/kg
What traditional unit does not have an SI equivalent - The roentgen
Which is used only for x-rays - The roentgen
1gy= - 100 rads
1sv= - 100 Remus
1rem= - Rads*qf
What is the average dose of background radiation received by in individual in the United
States - 150to300 mrads (0.0015-0.005gy)
What is the greatest contributor to artificial radiation exposure - Medical radiation
The amount of radiation exposure an individual receives varies bdepending on - Film
speed,collimation,technique,and exposure factors
A single interaoral radiograph (d-speed film,70 Kvp long pid) results in a mean surface
exposure of - 250 mr
What contributes to radiation injury - Total dose,dose rate,cell sensitivity and age
Long term effects are seen with? - Small amounts of radiation absorbed in a long period
Radiation injuries that are not seen in the person irradiated but that occur in future
generations are termed - Genetic effects
What is most susceptible to ionizing radiation - Small lymphocyte
The sensitivity of tissues to radiation is determined by - Mitotic activity,cell differention
and cell metabolism
What is considered radioresistant - Mature bone cells
An organ that if damaged, disminishes the quality of an individual's life is termed a -
Critical organ
The traditional unit for measuring x-Ray exposure in air is termed - The roentgen
Which radiation units is determined by the quality factor - The rem
The unit for measuring the absorption of x-rays is termed - The rad
1r= - 2.58*10c/kg
What traditional unit does not have an SI equivalent - The roentgen
Which is used only for x-rays - The roentgen
1gy= - 100 rads
1sv= - 100 Remus
1rem= - Rads*qf
What is the average dose of background radiation received by in individual in the United
States - 150to300 mrads (0.0015-0.005gy)
What is the greatest contributor to artificial radiation exposure - Medical radiation
The amount of radiation exposure an individual receives varies bdepending on - Film
speed,collimation,technique,and exposure factors
A single interaoral radiograph (d-speed film,70 Kvp long pid) results in a mean surface
exposure of - 250 mr
