Safety (Radiation Physics and Radiobiology)
for ARRT Boards Exam Questions With Correct
Answers 100% Verified.
x-ray production characteristics - Answer✔source of free electrons, acceleration of electrons,
focusing of electrons, deceleration of electrons
x-ray production - Answer✔occurs when current inside the xray tube flows from the cathode
and is suddenly stopped at the anode
bremsstrahlung - Answer✔a projectile electron misses outer shell electrons in the target and
moves in close to the nucleus (braking)
characteristic - Answer✔a projectile electron collides with an inner shell electron of a target
atom and creates a hole. Outer shell electron falls into space.
characteristic x-rays are produced at kVp levels greater than? - Answer✔70
frequency - Answer✔number of wavelengths passing a given point per unit time; measured in
hertz Hz
wavelength - Answer✔distance between successive crests of wave
quality - Answer✔kVp (strength of x-ray)
quantity - Answer✔mA (amount of x-ray)
primary radiation - Answer✔radiation exiting the x-ray tube
remnant(exit) - Answer✔x-rays that emerge from the patient and strike the image receptor
inverse square law - Answer✔law that governs the intensity of x radiation; states that intensity
of the xray beam is inversely proportional to the square of the distance between the source of
the x-rays and the object
Fundamental Properties - Answer✔ROENTGEN RAYS
1