Film Processing Part 1 Flashcards
Most modern medical imaging departments use ———- and most of these are ———–
- automatic processors
- daylight processors
Basic Components of a darkroom (4)
- An automatic processor
- Workbench
- A film bin
- Storage shelves
Only 1 side is located inside the darkroom
Automatic processor
where the cassettes are placed for unloading and loading film
Workbench
Top surface of a workbench should be made of a ——–, ——–
durable, static-resistant material
is used to store films that have been removed from their lighttight boxes in which are shipped
They are placed in the bin so they can be easily accessed to re-load emptied cassettes
Film bin
The film bin contains ———- that vary in depth and hold ——- of radiographic film
- individual slots
- various sizes
commonly located either under the workbench. These shelves are used to store boxes of radiographic films
Storage shelves
2 types of lights in Darkrooms
White lights and Safelights
2 types of lights in Darkrooms
White lights and Safelights
are used for equipment repair and darkroom cleaning
White Lights
are used during film processing to provide enough illumination for personnel to see but protect the film that has been removed from the cassettes and film bin from light fog
Safelights
Safelights use either a —— or a ——— recessed within a ——— fixture
- 7.5-watt or 15-watt incandescent bulb
- metallic light fixture
is attached to the front of the light fixture to prevent white light from reaching the film
A special colored filter
what is the most commonly used radiographic film ? and sensitive to all colors except ?
orthochromatic , red
what is the safelight filter commonly used in coventional radiographic darkrooms?
GBX-2 filter
This increased sensitivity to safelight illumination is called?
Latensification
Fogging of film by safelight illumination after it has been radiographically exposed and appears as an undesirable supplemental blanket of density on the processed radiographic image
post-exposure fog
Safelights are commonly mounted in the darkroom either on the ——- or directly over the ——- of the automatic processor
ceiling or directly over the film feed tray of the automatic processor
The safelight should be mounted at least ——- from the feed tray or work bench when a 7.5-watt bulb is used
3 feet
——— for a 15-watt bulb from the feed tray or work bench to avoid fogging the film
4 feet
used to protect the film from x-rays are inefficient toward stopping the highly penetrating gamma radiation emitted by radioactive pharmaceuticals
Lead-lined walls
optimal temperature for unused film
50-70° F
optimal relative humidity range for unused film
40-60° F
are stored either inside or outside the darkroom and used are to replenish the processing chemicals in the automatic processor
Processing chemicals
Chemicals can be either be stored in large round plastic tanks
replenishment tanks
designed to reclaim silver from processor’s fixer tank located in the vicinity of the replenishment tanks
Silver recovery unit
similar to most room doors, A manual locking knob or latch prevents personnel outside of the darkroom
Single-hinged door
similar to most room doors, A manual locking knob or latch prevents personnel outside of the darkroom
Single-hinged door
similar to most room doors, A manual locking knob or latch prevents personnel outside of the darkroom
Single-hinged door
offers much more protection than single-door entrance, as either door is opened, microswitch signals a locking mechanism on the other door
A double-door entrance
makes up approximately 3/4 of the circle. It is bordered by, and glides within, two 360-degree tracks; one attached to the ceiling and one attached to the floor
Sliding curved revolving door
does not use a door at all. Instead, there is a minimum of 2 hallways that run parallel to each other
maze-type entrance
allows persons to enter and exit the darkroom with no risk of film fogging, but requires a large area for its layout
maze-type entrance
wall-mounted, strategically placed between the radiographic rooms and the darkroom or between the viewing area and the darkroom
Passbox
After radiographic films are processed they are hung on a —–
viewbox
base of radiographic film provides the rigidity needed to facilitate the insertion of the film into these tension clamps
polyester base
Viewboxes contain multiple ———
fluorescent bulbs
What is the exterior and interior surfaces of a viewbox’s material
Plexiglas
device used to measure light intensity
light meter/photometer
light intensity units are called
lux or foot-candles
A typical radiographic film viewbox should have a minimum luminance
5382 lux or 500 foot-candles
special lights used by radiologists to evaluate radiographic images that are either grossly overexposed or to evaluate a specific area of the anatomical image that is overexposed relative to surrounding areas
hotlights
to deposit enough black metallic silver at the latent image sites in film to permit a permanent visible image to form
The primary purpose of radiographic processing
is the most sensitive and variable factor in the production of a radiograph
Film processing
Processing of a radiograph involves four primary steps
- developing, fixing
- washing and drying (two archiving steps)
Are accomplished in solutions that combine numerous chemicals
Developing and fixing
involves a two-step process of washing and drying the radiograph for use as a medical record
Archiving
involves a two-step process of washing and drying the radiograph for use as a medical record
Archiving
