DT Ch 9 Definitions and Matching

The controlling factor in the production of electrons available for radiographs is:

a. kilovolt power

b. milliampere cont

c. timer switch

d. timer

a. kilovolt power

Aluminum disks placed between the collimator and the tube window to remove weak radiation are:

a. collimators

b. anodes

c. filters

d. cathodes

c. filters

The tubehead area where the central beam or primary ray is projected is the:

a. target plane

b. focal spot

c. primary target

d. filament

b. focal spot

The positive pole in the tubehead that serves as a target for electron barrage is the:

a. filter

b. filament

c. anode

d. PID

c. anode

The abbreviation for the term milliampere is:

a. MA

b. mA

c. Ma

d. Mila

b. mA

The central ray or beam of radiation emitting from the tubehead or PID is

a. primary radiation

b. secondary radiation

c. stray radiation

d. soft radiation

a. primary radiation

The time or duration of interval when the current will pass through the x-ray tube is the:

a. processing time

b. count-up time

c. exposure time

d. latent time

c. exposure time

The distance between the anode target and the object to be radiographed is the:

a. target - film distance

b. target - object distance

c. film - PID distance

d. focal spot distance

b. target - object distance

Cumulative effect is the:

a. effect required to expose film emulsion to radiation

b. effect required to process the radiograph

c. effect of continual exposure to radiation

c. effect of continual exposure to radiation

The color of a RINN positioning device used for endodontic work is called:

a. blue

b. green

c. red

d. yellow

b. green

The ability of x-rays to penetrate and possibly ionize body tissues is called:

a. mutation effect

b. cumulative effect

c. sensitivity

d. ionization concentration

c. sensitivity

Radiation overdose that causes temporary redness of the skin is:

a. rad

b. erythema dose

c. Roentgen dose

d. Ma dose

b. erythema dose

Which type of film would be used to view the tooth crown, roots, and surrounding tissues:

a. interproximal

b. periapical

c. occlusal

d. panoramic

b. periapical

Another term for a bite-wing exposure is:

a. interproximal

b. periapical

c. occlusal

d. panoramic

a. interproximal

A size 4 radiograph packet would contain which film?

a. interproximal

b. periapical

c. occlusal

d. panoramic

c. occlusal

Which of the following is not considered a basic safety precaution in exposure of radiographs?

a. dosimeter

b. safelight

c. lead apron / thyrocervical collar

d. lead barrier or screen

b. safelight

Which of the following radiographic films is of particular use in orthodontics?

a. periapical

b. occlusal

c. cephalometric

d. edentulous

c. cephalometric

Variations of black and white colors on a radiograph are considered an example of:

a. contrast

b. detail

c. definition

d. fog

a. contrast

Another name for the paralleling technique for radiographic exposures is:

a. right angle technique

b. short cone technique

c. wide angle technique

a. right angle technique

If the PID is aimed in an upward position, it is considered to be which angulation?

a. negative

b. positive

c. zero

d. vertical

a. negative

cathode

negative pole in tube, source of electrons

sensitivity of rays

ability of rays to penetrate and possibly ionize tissues

indirect digital x-ray

conversion of a processed radiograph to a digital work station

detail

point-to-point delineation or view of tiny x-ray structures

radiolucent

ability of substance to permit ray passage, making film dark

cephalometric

radiograph of head, used in orthodontics, prosthodontics

definition

sharpness and clarity of image outline on radiograph

sagittal plane

imaginary line dividing head into right and left sides

ala-tragus line

imaginary line to direct placement of PID during exposures

edentulous survey

radiographs of patient without teeth

aperture or port

opening in lead collimator to regulate beam size

reticulation

crackling of film emulsion surface caused by temperature change

ion

particle carrying electric charge

elongation

tooth structure appearing longer than anatomical size

biteblock

device used to maintain films in the mouth during exposure