OT 2 Flashcards
What is quantum mottle?
A prominent graininess to the film.
What do kink marks (crescent marks) occur from?
Bending or crimping the film.
When is the latent image present?
After exposing the film, but before processing it.
Generally, which of the following would make the phosphor layer of the screen faster?
Thicker composition.
What film will create the radiographic image with greatest detail?
Single emulsion
What color is recommended for your dark room walls (according to Dale Grunwald?
Red
A 1200 screen speed system will demonstrate what appearance?
The film will be grainy.
What is the name for the usual test for film screen contact?
Wire mesh test.
With gradient screens, which of the following is fastest? The cervical section, the thoracic section, the lumbar section? Or do they all have the same speed?
The lumbar section has the fastest speed.
Silver is usually recovered from which fluid?
Fixer
What should be considered fi you are manually processing 30 14”x17” films per week?
An automatic processor?
What is the usual recommended optimal developing temperature for manual processing?
68 degrees
Which fluid requires the most replenishing in manual processing?
Developer fluid.
What are densitometry and sensitometry primarily used for?
To monitor processor function.
In which step of processing does a “kissing” artifact occur?
Developing.
Of the choices below, how could you best see the L5-S1 disc space and sacrum on and AP film?
a. use 45 degree rotation
b. use a cephalic tilt
c. use a caudal tilt
d. use the central ray perpendicular to the film
b. use a cephalic tilt.
Of the lung, liver, perineal fat and fundus of the stomach, which one is the most dense?
Liver
A contrast between the patient densities of air and water explains why we see which of the following?
a. epiglottis
b. psoas muscle
c. urinary bladder
d. thyroid cartilage
Urinary bladder.
What does the formula “5 (N-18) rems” refer to?
Occupational exposure M.P.D for radiation.
Of the following, which relates a dosiometer?
a. measuring the density of a film
b. testing developer strength
c. a gonad shield
d. a film badge
d. film badge.
What should you check when constructing an x-ray facility to make sure you are up to code with lead lining?
your local state requirements.
In inches, a secondary barrier needs to have how much lead equivalency?
1/32
In inches, a primary barrier needs to have how much lead equivalency?
1/16
What is the whole body occupational dose limit for x-ray?
if should not exceed 5 rems per year for whole body
