Deck 10: Radiation Safety and Protective Measures

Question 1

The roentgen unit is a measure of the:

A) amount of fluorescence from screens
B) number of ions created in air
C) number of ions created in tissue
D) amount of silver atoms on film

Answer 1

number of ions created in air

Question 2

Total filtration in the X-ray tube must be the equivalent of at least:

A) 2.5 mm aluminum
B) 1.5 mm aluminum
C) 0.5 mm aluminum
D) 1.0 mm aluminum

Answer 2

2.5 mm aluminum

Question 3

The quality of an X-ray beam is determined by the:

A) heat of the filament
B) kVp
C) mAs
D) distance

Answer 3

kVp

Question 4

The stage of life most sensitive to radiation is:

A) fetus
B) adult
C) elderly
D) all may be equally affected

Question 5

X-ray beam collimation is used because:

A) image quality is improved
B) patient dose is decreased
C) scatter radiation is decreased
D) all of the above

Question 6

Radiation dose to the gonads may cause:

A) somatic damage
B) genetic damage
C) cataracts
D) bremsstrahlung

Question 7

Personal dosimeters are designed to be worn:

A) outside the lead apron near the neck
B) inside the lead apron near the neck
C) inside the lead apron during fluoroscopy
D) inside the lead apron near the waist

Question 8

The length of the exposure cord of a mobile X-ray unit should be at least:

A) 8 feet
B) 6 feet
C) 4 feet
D) 2 feet

Question 9

The law of Bergonié and Tribondeau implies that radiosensitivity is greatest in:

A) cells that are rapidly dividing
B) cells that are highly differentiated
C) cells that divide slowly over time
D) cells that make up the nervous system

Question 10

Which of the following is the most effective means of protecting the radiographer from exposure to radiation?

A) Minimize time
B) Increase distance
C) Wearing a lead apron
D) All of the above