Radiology

Question 1

X rays discovered

Answer 1

Roentgen, Nov 8th 1895

Question 2

Rollins

Answer 2

Developed guidelines for protection of patients, lab rats

Question 3

Roentgenology

Answer 3

Study or science of radiation as used in medicine and dentistry

Question 4

Radiolucent

Answer 4

E- pass, not dense, shows black

Question 5

Radiopague

Answer 5

E- do not pass=dense, appears white

Question 6

Direct sensor

Answer 6

To computer

Question 7

Attenuate

Answer 7

Stope the electrons, shows up radiopague whereas dentin is less dense

Question 8

Indirect sensor

Answer 8

Simple film which goes into a processor-optime

Question 9

X-rays are produced

Answer 9

Bombarding tungsten target with high V e- go to anode at high speeds

Question 10

Thermionic emission

Answer 10

Term to describe boiling off of electrons

Question 11

Filament

Answer 11

Coil of tungsten which emits electrons when heated

Question 12

Focussing cup

Answer 12

Negatively charged molybdenum

Question 13

Tungsten target

Answer 13

Anode

Question 14

Focal spot

Answer 14

Are w/in target where e- directed, smaller gives sharper image

Question 15

Smaller focal spot

Answer 15

Sharper image

Question 16

Bermsstrahlung

Answer 16

Higher energy e- is slowed by protons in nucleus

Question 17

Characteristic radiation

Answer 17

E- knocks out inner shell electrons; unstable vacancy, electrons fall down/emit photons

Question 18

Controls speed of e- from cathode to anode

Answer 18

kV and mA

Question 19

Controls quality of x ray beam

Answer 19

KV

Question 20

MA

Answer 20

Controls # of electrons and quantity of e- higher=darker

Question 21

Higher mA =

Answer 21

Darker

Question 22

Radiographic contrast

Answer 22

Related to quality of x-radiation, controlled by kV

Question 23

High contrast

Answer 23

Short scale and less shades of gray

Question 24

Low contrast

Answer 24

Long scale (more colors) more shades of gray

Question 25

Image is produced by

Answer 25

E- emitted from cone-tissue-attenuated-some e- pass and hit sensors

Question 26

Contrast controlled by

Answer 26

Kv

Question 27

Examples of radiolucencies

Answer 27

Caries, fossa, sinus, pathology

Question 28

Radiopague ex;

Answer 28

Dentin, enamel, calculus, amalgam, restoration, calculus

Question 29

Most radiopague

Answer 29

Amalgam restoration

Question 30

DEJ

Answer 30

Grey to white enamel

Question 31

Lamina dura

Answer 31

Radiopague covering between root and bone