OT 1 Flashcards
The sheet of lead in a cassette serves what purpose?
to help prevent back scatter.
Using an “extremity” cassette will have what effect?
it will increase the patient exposure.
If your cassette was incompletely closed, what would the film probably look like?
It would have a black strip at the edge.
What exists on a film after you have exposed the patient but before processing it?
a latent image
too high of kV will have what effect on the film?
Quantum mottle
Which combination of screen light and film color is preferred?
green light and purple film
What is the reason why many recommend that you NOT use an extremity screen system in an office that performs mainly spine films?
the extremity film may get mixed with the spine cassettes and require retakes.
About hot often should you clean intensifying screens?
Three months
About how many 14”x 17” films should be run through an automatic processor in a week before it is economically feasible?
20-25
How would your processed film appear if you decreased the recommended developing time and maintained the recommended temperature?
It will be too light
What is the usual recommended optimal developing temperature for manual processing?
68 degrees
In which phase of processing does the latent image become the manifest image?
Developing
A high intensity lamp is usually used for which of the following?
to better see over-exposed areas on a film.
Which of the following is the proper arrangement of the five subject densities seen on the radiograph from most dense to least dense?
Heavy metal, metal, water, oil, air.
Why are the renal shadows often seen on an A-P lumbar film?
Due to contrast between oil and water densities.
