Question 1

What refers to the average energy or penetrating ability of the x-ray beam and is controlled by the kilovoltage peak (kVp)?&#10;A) Quantity&#10;B) Milliamperage&#10;C) Intensity&#10;D) Quality

Accepted Answer

In dental imaging, the term quality is used to describe the mean energy or penetrating ability of the x-ray beam. The quality, or wavelength and energy of the x-ray beam, is controlled by kilovoltage.

Question 2

What affects film density and contrast?&#10;A) Milliamperage&#10;B) Kilovoltage peak&#10;C) Half-value layer&#10;D) Inverse square law

Accepted Answer

Increased kilovoltage produces x-rays with increased energy, shorter wavelength, and increased penetrating power; kilovoltage affects density and contrast.

Question 3

What refers to number of x-rays produced and is controlled by the milliamperage?&#10;A) Quantity&#10;B) Intensity&#10;C) Quality&#10;D) Kilovoltage

Accepted Answer

Quantity refers to the number of x-rays produced and is controlled by the milliamperage.

Question 4

What is the total energy contained in the x-ray beam in a specific area at a given time?&#10;A) Quantity&#10;B) Intensity&#10;C) Quality&#10;D) Milliamperage

Accepted Answer

Intensity is the total energy contained in the x-ray beam in a specific area at a given time; intensity is affected by kilovoltage, milliamperage, exposure time, and distance.

Question 5

What is used to explain how distance affects the intensity of the x-ray beam?&#10;A) Half-value layer&#10;B) Voltage&#10;C) Milliamperage&#10;D) Inverse square law

Accepted Answer

The inverse square law is used to explain how distance affects the intensity of the x-ray beam.

Question 6

What is placed in the path of the x-ray beam to reduce the intensity and remove the low-energy x-rays from the beam?&#10;A) Lead collimator&#10;B) Kilovoltage&#10;C) Aluminum filter&#10;D) Glass window

Accepted Answer

An aluminum filter is placed in the path of the x-ray beam to reduce the intensity and remove the low-energy x-rays from the beam.

Question 7

The distance from the source of the radiation to the patient's skin is the target-_____ distance.&#10;A) film&#10;B) object&#10;C) surface&#10;D) electron

Accepted Answer

The distance from the source of radiation (tungsten target in node) to the patient's skin is known as the target-surface distance.

Question 8

What controls the penetrating power of the x-ray beam by controlling the number of electrons produced in the x-ray tube and the number of x-rays produced?&#10;A) Kilovoltage&#10;B) Milliamperage&#10;C) Intensity&#10;D) Quality

Accepted Answer

Milliamperage controls the penetrating power of the x-ray beam by controlling the number of electrons produced in the x-ray tube and the number of x-rays produced.

Question 9

When milliamperage is increased, the exposure time must be:&#10;A) increased.&#10;B) kept constant.&#10;C) turned off.&#10;D) decreased.

Accepted Answer

Milliamperage and exposure time are inversely related. When milliamperage is increased, exposure time must be decreased.

Question 10

What refers to how sharply dark and light areas are differentiated or separated on a film?&#10;A) Contrast&#10;B) Density&#10;C) Intensity&#10;D) Quantity

Accepted Answer

Contrast refers to how sharply dark and light areas are differentiated or separated on an image.

Deck 3: Radiation Characteristics