Rad 3 Spring 04 Final

Question 1

What is quantum mottle?

a. visible grain lines
b. an extreme amount of gray tones
c. the appearance of roller marks
d. a prominent graininess to the film

Answer 1

a prominent graininess of the film

Too HIGH kV, too LOW mAs, to FEW photons

Question 2

Kink marks (crescent marks) occur from which of the following?

a. static electricity
b. dirty intensifying screen
c. bending or crimping the film
d. warped screens or bent cassettes

Answer 2

bending or crimping the film

Question 3

When is a latent image present?

a. when a new patient walks through your door
b. after exposing the film but before processing it
c. after processing the film but before viewing it
d. when you first see it on a viewbox

Answer 3

after exposing the film but before processing it

Question 4

Generally, which of the following would make the phosphor layer of the screen faster?

a. small crystals
b. gradient crystals
c. thinner composition
d. thicker composition

Answer 4

thicker composition

Question 5

Which of the following types of films will create the radiographic image with greatest detail?

a. rare earth
b. fast screen
c. direct exposure
d. single emulsion
e. calcium tungstate

Answer 5

single emulsion

Single screen cassettes

Question 6

What color is recommended for your darkroom walls?

a. purple
b. black
c. white
d. green
e. red

Answer 6

red

Question 7

A 1200 screen speed system will usually demonstrate which appearance?

a. the film will be grainy
b. the film will be fogged
c. the film will be sharper
d. the film will demonstrate image blurring

Answer 7

the film will be grainy

Question 8

What is the name for the usual test for film screen contact?

a. penny test
b. light leak test
c. wire mesh test
d. static electricity

Answer 8

wire mesh test

Question 9

Silver is usually recovered from which fluid?

a. fixer
b. developer
c. wash water
d. replenisher

Answer 9

fixer

Question 10

Which of the following should be considered if you are manually processing 30, 14x17 films per week?

a. turn up the temperature so you can develop faster
b. increase the mAs so the film will darken faster
c. get an automatic processor
d. cut back on your patient load

Answer 10

get an automatic processor

Question 11

What is the usual recommended optimal developing temperature for manual processing?

a. 98 degrees
b. 90 degrees
c. 68 degrees
d. 60 degrees

Answer 11

68 degrees

Question 12

Which fluid requires the most replenishing in manual processing?

a. fixer
b. wash water
c. rinse water
d. developer

Answer 12

developer

Question 13

Densitometry and sensitometry are primarily used for which purpose?

a. to monitor film fogging
b. to monitor patient exposure
c. to monitor processing function
d. to monitor consistency of the mAs

Answer 13

to monitor processing function

Question 14

In which step of manual processing does a “kissing” artifact occur?

a. fixing
b. dying
c. washing
d. developing

Answer 14

developing

Question 15

Of the choices below, how could you best see the L5-S1 disc space and sacrum on an AP film?

a. use 45 degree rotation of the patient
b. use a cephalic tube tilt
c. use a caudal tube tilt
d. use the central ray perpendicular to the film

Answer 15

use a cephalic tube tilt

Question 16

Of the following structures, which is the most dense?

a. lung
b. liver
c. peritoneal fat
d. fundus of the stomach

Answer 16

liver

Question 17

A contrast between the patient densities of air and water explains why we see which of the following?

a. the epiglottis
b. the psoas muscle
c. the urinary bladder
d. the thyroid cartilage

Answer 17

urinary bladder

Question 18

What does the formula ‘‘5 (N-18) rems” refer to?

a. determining factor between a primary and secondary barrier
b. acceptable radiation going through a primary barrier
c. maximum acceptable does for a 5 month period
d. occupational exposure M.P.D. for radiation

Answer 18

occupational exposure M.P.D. for radiation

Question 19

What should you check when constructing an x-ray facility to make sure you are up to code with lead lining?

a. the machine manufacturers manual
b. a nearby doctor’s x-ray facility
c. your local state requirements
d. the NCRP guidelines

Answer 19

your local state requirements

Question 20

In inches a secondary barrier needs to have how much lead equivalency?

a. 1/32
b. 1/16
c. 1/8
d. 1/4

Answer 20

1/32