Radiology Terms

Question 0

Few shades of gray with high contrast is produced with ——KV p

Answer 0

Low Kvp

Question 1

Radiograph with many light and dark areas ,but FEW shades of grey is said to have

Answer 1

High contrast

Question 2

Film produce using 90 KVp and 0.25 seconds What exposure time is needed the same at 75 KVp

Answer 2

0.50 seconds

Question 3

Increasing mA alone results in a film with

Answer 3

Increased density

Question 4

The total energy contained in the X ray beam in a specific area at a given time is termed

Answer 4

Intensity

Question 5

Increasing these will increase the intensity of the X-ray beam

Answer 5

KVp ,MA and exposure time

Question 6

The HVL is the amount of

Answer 6

Aluminum needed to reduce the X-ray beam intensity by half

Question 7

The KVy range for most dental X-rays is

Answer 7

More penetrating ability

Question 8

Radiation produce with high KVp results in

Answer 8

Short wavelengths

Question 9

Increasing MANY results in a increase in

Answer 9

Temp of filament and number of X-rays produced

Question 10

The mA range dental radiography is

Answer 10

7to 15 mA

Question 11

Thermionic emission occurs in the

Answer 11

Negative cathode

Question 12

Which radiation accounts for 70%of all the X-ray’s energy produce at the anothe

Answer 12

General radiation

Question 13

Primary radiation best describe as

Answer 13

Radiation exist the tubehead

Question 14

Which type of scatter happens most often with dental X-rays

Answer 14

Compton

Question 15

Why is an increased target film distance required in the paralleling technique

Answer 15

To avoid image magnification

Question 16

Thin transparent coating that is placed over the emulsion

Answer 16

Proctetive layer

Question 17

Chemical compounds that change when is exposed to radiation or light are termed

Answer 17

Halides crystals

Question 18

Invisible pattern of stored energy on the exposed energy on the exposed film is termed

Answer 18

Late te image

Question 19

Purpose of a lead foil sheet in the film packet is

Answer 19

To protect film from back scattered radiation

Question 20

The —–the cristals ,the——the film speed

Answer 20

The large the cristal the film spread

Question 21

Examined

Answer 21

Film position -parallel to the long axis vertical angulation -CR directed perpendicular to film /horizontal angulation -CR directed thru contact -open /film exposure -center X-rays beam to espose film

Question 22

Molecule

Answer 22

2 or more atoms joined by chimical bonds

Question 23

Ionization

Answer 23

Losing or gaining an electron

Question 24

Radiation

Answer 24

Emission or propagation of energy though space or matter ,waves or particles

Question 25

Ionizing

Answer 25

Radiation that is capable of producing ions by removing or adding electron to an atom

Question 26

Velocity

Answer 26

Wave speed =speed of light

Question 27

Wavelength

Answer 27

Distance b/t crest -energy and penetrating power

Question 28

Frecuency

Answer 28

of wavelenths tha pass a giving points in a certain amount of time Low freq./long wavelength= increase energy

Question 29

X-radiation

Answer 29

Type of high energy ,ionizing electromagnetic radiation

Question 30

Amperage (mA)

Answer 30

of electron moving through the cathode to the anode

Question 31

Voltage (KV)

Answer 31

Controls the current passing from the cathode to the anode

Question 32

Speed of light

Answer 32

186.000 miles /seconds

Question 33

Produce when radiation strikes matter, reduces penetrating power

Answer 33

Secondary radiation

Question 34

When radiation is deflected off

Answer 34

Scatter radiation

Question 35

What regulate the flow of electrical current to the filament of the X-ray tube

Answer 35

Low- voltage circuit

Question 36

What is used to increase the voltage in the high - voltage circuit

Answer 36

Set- up transforme

Question 37

Process by which unstable atoms undergo a spontaneous des integration in a effort to attain a more balance nuclear state (undergo decay trying to become more balance

Answer 37

Radioactivity

Question 38

Who introduce paralleling tech . And expose first dental radiograph in the USA use live person

Answer 38

C.edmund Kells 1896

Question 39

Introduce bisecting technique

Answer 39

Weston price 1904

Question 40

Introduce bite - wing tech

Answer 40

Howard raper 1925

Question 41

For components of a film packaging

Answer 41

X-ray film paper film wrapper lead foil sheet outer packaging

Question 42

Tha higher the speed on the film

Answer 42

The faster the film expose and the less radiation to pacient ALARA

Question 43

Four basic components of X-ray film

Answer 43

Film base adhesive layer film emulsion protective layer

Question 44

Developer

Answer 44

Softens emulsion reduce exposed crystal to black metallic silver

Question 45

Fixer

Answer 45

Hardens emulsion cleans away unexposed crystal silver halide

Question 46

Chemical components that change when expose to radiation or light are termed

Answer 46

Silver halide crystal - reduce to black metallic silver

Question 47

Five rules for paralleling tech

Answer 47

Film placement - most cover teeth to be

Question 48

Compton scatter

Answer 48

62% X-ray photon is deflected form path during passage through matter (ionization occurs )

Question 49

Coherent scatter

Answer 49

8% X-ray photon that has its path altered by matter no change in atom occurs , no ionization