Dent 1050 Test 3

Front 1

Quality

Back 1

(Wavelength) Mean energy or penetrating ability of the x-ray beam, controlled by kilovoltage

Front 2

Voltage

Back 2

Measurement of force (higher force, higher penetrating power),

Front 3

Volts/Kilovolts

Back 3

Unit of measurement describing the potential that drives an electrical current through a circuit

1 Kilovolt= 1000 Volts

Front 4

Kilovoltage Peak

Back 4

Maximum or peak voltage, regulates the speed and energy (quality) of the electrons and determines the penetrating ability of the x-ray beam

Front 5

Filtration

Back 5

Removes the low energy x-rays

Front 6

Half-Value Layer

Back 6

Thickness of a specified material that when placed in the path of the x-ray reduces the intensity by 1/2

Front 7

Density

Back 7

Overall blackness or darkness of the film

Front 8

When the kVp is increased...

Back 8

the FILM exhibits and increased density, appears darker

Front 9

When the kVp is decreased

Back 9

the FILM exhibits a decreased density, appears lighter

Front 10

High density tissue areas

Back 10

Will stop x-rays completely, appear white on x-ray film

Front 11

Medium density areas

Back 11

Partially block the x-ray, appear as shades of gray (bone, dentin)

Front 12

Low density areas

Back 12

Allow x-rays to pass thru completely, appear black on the film (pulp)

Front 13

Contrast

Back 13

How sharply light and dark areas are differentiated in an image, determined by the kVp

Front 14

High contrast image

Back 14

Produced by a low kVP, has distinct black and white areas with few shades of gray, good for detecting dental caries

Front 15

Low contrast image

Back 15

Produced from a high kVp setting and the resulting film will have many shades of gray, good for perio disease

Front 16

Exposure time

Back 16

Interval of time during which x-rays are produced, measured by impulses

Front 17

Impulse

Back 17

One occurs every 1/60 of a second

Front 18

Relationship of exposure time and kVP

Back 18

Inversely related

Front 19

Kilovoltage Peak Rule

Back 19

When kVp is increased by 15, exposure time should be decreased by 1/2. When kVp is decreased by 15, exposure time should be doubled

Front 20

Quantity

Back 20

The number of x-rays produced

Front 21

Amperage

Back 21

Determines the amount of electrons passing through the cathode filament

Front 22

Ampere

Back 22

Unit of measure that describes the number of electrons (or current flowing through the cathode filament)

Front 23

Milliampere

Back 23

mA, equal to 1/1000 of an ampere

Front 24

Milliamperage

Back 24

Regulates the temperature of the cathode filament

Front 25

Relationship between density and mA

Back 25

Increase in mA increases the density of the radiograph (darker image)

Front 26

Relationship between exposure time and mA

Back 26

Inversely related

Front 27

Intensity

Back 27

Product of the quantity and quality per unit of area per unit exposure rate

Front 28

Target-surface distance

Back 28

From source of radiation to the patient's skin

Front 29

Target-object distance

Back 29

The source of radiation to the tooth (object)

Front 30

Target-film distance

Back 30

From the source of radiation to the film

Front 31

Inverse Square Law

Back 31

Intensity of radiation is inversely proportional to the square of the distance from the source of radiation

Front 32

Labial Mount

Back 32

Raised (convex) dot is towards the viewer, viewed as if looking directly at the patient

Front 33

Lingual Mount

Back 33

Depressed dot is mounted away from the viewer, as if viewed from inside the patient's mouth