Radiation Characteristics

Question 1

Mean energy or penetrating ability of the x-ray beam which is controlled by kilovoltage

Answer 1

Quality

Question 2

Refers to the potential difference between two electrical charges

Answer 2

Voltage

Question 3

Is the measurement of electrical force that causes electrons to move from the negative cathode to the positive anode

Answer 3

Voltage

Question 4

What is the measurement of voltage?

Answer 4

Kilovolts (kV)

Question 5

Unit of measurement used to describe the potential that drives an electrical current through a circuit

Answer 5

Volts

Question 6

Dental radiography requires the use of how many kV?

Answer 6

65 to 100 kV

Question 7

Is controlled by the kilovoltage peak adjustment on the x-ray control panel

Answer 7

Kilovoltage

Question 8

Defined as the maximum or peak voltage

Answer 8

Kilovoltage peak

Question 9

A beam that contains many different wavelengths of varying intensities that is produced as a result of varying kilovoltages occurring in the tube current

Answer 9

Polychromatic x-ray beam

Question 10

This regulates the speed and energy of the electrons and determines the penetrating ability of the x-ray beam

Answer 10

Quality and kilovoltage peak

Question 11

Overall darkness or blackness of a film

Answer 11

Density

Question 12

When the kilovoltage peak is increased while other exposure factors remain constant, the resultant film exhibits an?

Answer 12

Increased density and appears darker

Question 13

If kilovoltage is decreased, the resultant film exhibits a?

Answer 13

Decreased density and appears lighter

Question 14

Refers to how sharply dark and light areas are differentiated or separated on a film

Answer 14

Contrast

Question 15

What is a film with many black and white areas and a few shades of gray? What causes it?

Answer 15

High contrast film
Low kVp setting

Question 16

What is a film with many shades of gray instead of black and white? What causes it?

Answer 16

Low contrast film
High kVp setting

Question 17

What is the range for low kVp setting?

Answer 17

65-70 kVp

Question 18

What is the range for high kVp setting?

Answer 18

≥90 kVp

Question 19

Refers to the interval of time during which x-rays are produced

Answer 19

Exposure time

Question 20

Exposure time is measured in

Answer 20

Impulses

Question 21

According to the kilovoltage peak rule, when kVp is increased by 15, exposure time should be?

Answer 21

Decreased by one-half

Question 22

According to the kilovoltage peak rule, when kVp is decreased by 15, exposure time should be?

Answer 22

Doubled

Question 23

Refers to the numbers of x-rays produced

Answer 23

Amperage

Question 24

Unit of measure used to describe the number of electrons, or current, flowing through the cathode filament

Answer 24

Ampere

Question 25

In dental radiography, the use of how many milliampere is required?

Answer 25

7-15 ma

Question 26

Regulates the temperature of the cathode filament

Answer 26

Milliamperage

Question 27

Increase in milliamperage increases the overall density of the radiograph and results in?

Answer 27

A darker image

Question 28

Decrease in milliamperage decreases the overall density of the radiograph and results in?

Answer 28

A lighter image

Question 29

When milliamperage is increased, exposure time must be?

Answer 29

Decreased

Question 30

When milliamperage is decreased, exposure time must be?

Answer 30

Increased

Question 31

The product of the quantity and quality per unit of area per unit of time of exposure

Answer 31

Intensity

Question 32

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-ray produced

Answer 32

Intensity and Milliamperage

Question 33

The distance from the source of radiation to the patient's skin

Answer 33

Target-surface distance

Question 34

The distance from the source of radiation to the tooth

Answer 34

Target-object distance

Question 35

The distance from the source of radiation to the receptor

Answer 35

Target-receptor distance

Question 36

According to this law, the intensity of radiation is inversely proportional to the square of the distance from the source of radiation

Answer 36

Inverse Square Law

Question 37

Are used to remove the low-energy, less penetrating, longer wavelength x-rays

Answer 37

Aluminum filters

Question 38

Increased the mean penetrating capability of the x-ray beam while reducing the intensity

Answer 38

Aluminum filters

Question 39

To reduce the intensity of the x-ray beam, aluminum filters are placed in the path of the beam inside the dental x-ray tubehead

Answer 39

Half-value layer