Radiology I

Question 1

The kVp controls the

Answer 1

Quality of the x-ray beam

Question 2

The acceleration of the electrons and their ultimate striking energy is determined by the

Answer 2

kVp

Question 3

When taking a radiograph, you should whenever possible

Answer 3

Decrease exposure time, increased distance from the radiation source and increase shielding

Question 4

If a film is too dark and overpenetrated, you should

Answer 4

Decrease kVp 10-15%

Question 5

If a radiograph is too dark but has adequate penetration, you should

Answer 5

Decrease mAs 30-50%

Question 6

If a radiograph is too light with adequate penetration, you should

Answer 6

Increase mAs 30-50%

Question 7

When depressing the “prep” switch on a rotating anode x-ray machine, you are effectively

Answer 7

Heating up the filament and spinning the rotating anode

Question 8

Which of the following does not affect radiographic density?

Answer 8

Object-film distance

Question 9

Which of the following absorbs the most x-rays?

Answer 9

Metal

Question 10

What is the term used to describe the tube-to-film distance?

Answer 10

Focal-film distance

Question 11

Which of these techniques causes a major increase in scatter radiation?

Answer 11

Increasing the kVp

Question 12

The minimum standard of lead equivalent for protective aprons and gloves is

Answer 12

0.5 mm

Question 13

What safety feature on x-ray machines limits the size of the primary beam and reduces secondary x-ray exposure to the operator?

Answer 13

Collimator

Question 14

What patient restraint is recommended for the greatest safety from radiation exposure?

Answer 14

Chemical restraint without holding the patient

Question 15

The milliampere-seconds (mAs) setting on an x-ray machine controls the

Answer 15

Quantity of x-rays emitted

Question 16

If cracks are present in protective apparel, they appear ___ when radiographed.

Answer 16

Black

Question 17

The minimum age, in years, for a person to be involved in radiographic procedures is

Answer 17

18

Question 18

The focal spot is

Answer 18

The spot on the tungsten target that the electron beam is aimed at

Question 19

How does milliamperage affect the electrons in an x-ray beam?

Answer 19

Increasing the milliamperage increases the number of electrons produced and increases the number of x-rays produced per unit of time.

Question 20

Which of the following controls radiographic contrast?

Answer 20

kVp

Question 21

he filament of an x-ray tube is the

Answer 21

Tungsten coil that emits electrons when heated

Question 22

Name this device used to measure patients for radiographs

Answer 22

Calipers