QUESTIONS WITH SOLUTIONS GRADED A+
◉ X-rays are produced whenever fast-moving electrons collide with
any form of matter because:
1. the electron splits into two x-ray photons of equal energy upon
impact with the matter.
2. the electro loses kinetic energy which is converted into the
emission of an x-ray photon
3. the electron converts the electron it collides with into an x-ray
photon.
a. 1 only
b. 2 only
c. 3 only
d. 1, 2 & 3. Answer: B
◉ The mA determines the:
a. quantity of x-ray photons
b. coefficient of attenuation
c. slice thickness
d. energy level of the x-ray photons. Answer: A
, ◉ Which of the following is a component NOT normally located in
the gantry of a modern CT system?
a. pre-patient collimators
b. solid-state detectors
c. array processor
d. x-ray tube. Answer: C
◉ Tube interscan delay time refers to:
a. the time between the end of one scan and the start of the next
scan during which the tube will cool
b. a quality assurance test performed daily by the technologist.
c. the time required for the tube to make a complete 360 revolution
about the gantry.
d. the length of time required for the production of photons to begin
after applying the voltage to the tube.. Answer: A
◉ Increased ___ will increase the likelihood that a given x-ray will
penetrate a material.
1. kV
2. mA
3. exposure time
a. 1 only
b. 2 only