Final: practice questions Flashcards
unprocessed rare earth film has usually what color
purple
how should unexposed x-ray film be stored
with the box on end
what is the recommended intensifying screen for use in a chiropractic office
rare earth
what contains silver halide crystals
film emulsion
how will dirt on the intensifying screen appear on the exposed film
white specks
what problem could occur if your intensifying screen is warped
a blurry area from bad contact
why should bad films that you have retaken not be destroyed
they can be sold for silver
with gradient screens, what would be true
the lumbar section has the fastest speed
what part of an automatic processor is responsible for removing excess fluid as the film exits a tank
squeegee rollers
silver is usually recovered from what fluid
fixer
small white specks on the processed film usually indicate what
dirty intensifying screen
how would your processed film appear if your developer temperature was above normal and it was developed at the normal time
it would be too light
what is usually considered the optimal developing time for manual processing
5 minutes
a film taken with a 1200 screen speed system will usually demonstrate what appearance
the film will be grainy
what color safelight filter is needed for most rare earth screens
red
how long is a doctor required to keep the records of radiation exposure on a worker in his/her office
for the lifetime of the individual
where would an oil density normally be found on an xray
outlining some muscles and organs
the contrast of natural metal density and water density explains why we often see what
an arteriosclerotic aorta
what releases to a dosimeter
a film badge
if you saw the support back or hinges imaged on a film. what would be the most common reason
you put the cassette in backwards
what US governmental agency mandates the removal of silver from a processing fluid before disposal
EPA
in inches, what is the lead equivalent thickness required for a ceiling of a single story building
none
what is true about occupational dose limits
the should not exceed 5 rems per year for the whole body
pull out old xrays-> yellow-brown-> what was done incorrectly
the films were not washed long enough
17 year old wants to take xrays for you-> what does he have to do
wait until the next summer when he is 18
what is a quantum mottle
a prominent graininess to the film
kink marks (crescent marks) occur from what
bending or crimping the film
when is a latent image present
after exposing the film but before processing it
generally, what would make the phosphor layer of the screen faster
thicker composition
what types of films will create the radiographic image with greatest detail
single emulsion
what color is recommended for your darkroom walls
black
a 1200 screen speed system will usually 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, what would be true
the lumbar section has the fastest speed
silver is usually recovered from what fluid
fixer
what should be considered if you are manually processing 30 14x17” films per week
get an automatic processor
what is the usual recommended optimal developing temperature for manual processing
68 degrees
densitometry and densitometry are primarily used for what purpose
to monitor processor function
in what step of manual processing does a “kissing” artifact occur
developing
how could you best see the L5-S1 disc space and sacrum on an AP film
use a cephalic tube tilt
what relates to a dosimeter
a film badge
what should you check when constructing an xray 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
what is true about occupational dose limits
it should not exceed 5 rems per year for the whole body
all photos look fogged-> dryer temp is 102 degrees, film box is purple, safe light filter is amber, box is standing on end-> likely cause
his processor dryer temperature is too hot
in order to justify an automatic processor, 20-25 14x17” films should be run through in what time period
per week
if your temperature is too high in the dryer part of your automatic processor, what would be the most likely
the films will probably have water spots
with manual processing after a film is first put into a solution, what is the next recommended thing to do
agitate it
if you have 2 films of a patient that demonstrates a kissing artifact, why do ou suspect it could be necessary to retake the films
because kissing artifacts can be mistaken for pathologies
if your developer smells like ammonia, what does it usually mean
it is oxidized
where would you place the wire mesh for a wire mesh test
on the cassette
what is not one of the criteria for holding a patient
only employees should hold the patient
what is the occupational annual dose limit for whole body exposure
5 rem
let’s say you have installed an automatic processor in your dark room. since it is a big processor, you actually want it to be out of your small darkroom. what part of the processor must be in the darkroom
the feed tray
1/16th inch lead is equivalent to how many inches of concrete
four
which combination of screen light and film color is preferred
green light and purple film
how will dirt on the intensifying screen appear on the exposed film
white specks
what would lead to the least exposure of a patient to ionizing radiation
a dual screen system
what effects will too fast of a film screen combination have on the radiograph
it will demonstrate a graininess
what speed if preferred in general spinal radiography with 3 rare earth system
400
having a thicker phosphor layer in your screens will have what effect
make the screen faster
what is the wire mess test for
if there is good contact between the screens and film
why should bad films that you have retaken not be destroyed
they can be sold for silver
about how many 14x17” films should be run through an automatic processor in a week before it is economically feasible
20-25
densitometry is a way to do what
to check consistency of processing
when using the four basic densities of xray interpretation, what is the second least dense
oil
in inches, what is the lead equivalent thickness required for a ceiling of a single story building
none
full spine series-> fat, big belly-> sectionals-> what are you going to do to get a good film
a dual screen cassette with a grid
black branching streaks randomly placed on the film is usually due to what
static electricity
what type of film is preferred in a chiro office
double emulsion
what advantage does a single screen cassette have
increased image detail
which speed is preferred in general spinal radiography with a rare earth system
400
an arbitrary number of 100 speed screens is referred to as
par
“rare earth” screens have what effect
less radiation dose to the patient
what would produce the most grain (noise) on a film
using fast speed screens
with intensifying screens, what would give better detail
a single screen system
which color light is preferred from the intensifying screen crystals today
blue-green
a 100 speed rare earth dual screen system are often used for what
wrist
in order to justify an automatic processor, 20-25 14x17” films should be run through in what time period
per week
if your temperature is too high in the dryer part of your automatic processor, what would be the most likely
them films will probably have water spots
what would oxidized developer look like
brown
what is true about manual processing
fixing is twice as long as developing
with processing equipment, which tan contains an acidic solution
fixing tank
four inches of concrete is equivalent to how much lead
1/16th of an inch
a primary barrier needs to be how thick when using lead
1/16th of an inch
in inches, what is the lead equivalent thickness required for a ceiling of a single story building
none
what has been the established DL for occupational exposure of the extremities
50 rads/year
how long is a doctor required to keep the records of radiation exposure on a worker in his/her office
for the lifetime of the individual
what is the occupational annual dose limit for whole body exposure
5 rem
what is true about holding a patient for xray procedures
the holder should wear a lead apron
ID printer-> put it where it belongs-> where would be the best location for the printer
the work bench in the dark room
monthly maintenance-> what should be done
pull out all of the transport racks and clean with a brush
