DARKROOM Flashcards
is a specialized area where exposed
radiographic films are processed. It is designed to
be completely devoid of white light to prevent film
fogging, ensuring that the film retains its
diagnostic quality.
darkroom
QUALITIES OF A GOOD PROCESSING ROOM
Adjacent to exposure room
no windows
accessible to plumbing and electrical service
away from damp or hot areas
proper film handling
proper illumination and ventilation
This minimizes the risk of film exposure to light or radiation
during transport and ensures efficient workflow.
Adjacent to exposure room
Any exposure to white light can lead to film fogging,
reducing image quality. If ventilation is necessary, light-
proof vents should be used.
No windows
Running water is essential for manual film processing to
rinse and fix the films properly. Electrical access is needed
for automatic processors and safelights.
Accessible to plumbing and electrical service
Excessive heat and humidity can cause film fogging and
degrade the quality of the chemicals used in film processing.
Ideal temperature control should be maintained.
Away from damp or hot areas
Storage racks and proper handling techniques must be in
place to prevent film scratches, pressure marks, or
accidental exposure to external light sources.
Proper film handling
While the darkroom must be free of white light, safelights
(using red or amber filters) should be used to provide
adequate visibility for technicians. Proper ventilation helps
remove chemical fumes frodevelopers and fixers, which
can be harmful if accumulated.
Proper illumination and ventilation
Since darkrooms are often adjacent to radiographic
rooms, shielding is required to prevent radiation
leakage
Lead Shielding
Recommended lead thickness for shielding:
Recommended Thickness
1.6 mm
(1/16 inch) lead.
DARKROOM SIZE AND
CAPACITY
The size of the darkroom should be adequate to prevent
overcrowding, ensuring efficient workflow and film
handling.
15x9.5 FT
200 RADIOGRAPH
DARKROOM DIVISIONS
These divisions help in maintaining an organized and
efficient workflow, ensuring high-quality radiographs for
diagnostic use
Quality control section
Viewer side
file room
Ensures that chemicals, safelights, and
film processing conditions are
maintained at optimal levels.
Regularly checks for any film artifacts,
chemical contamination, or processor
malfunctions.
Quality Control Section
Contains a film viewing area where
processed radiographs are
inspected for quality before storage
or diagnosis.
Viewer Side
A designated area for storing processed films and
patient records. Proper film archiving methods must
be used to ensure easy retrieval and prevent film
deterioration.
File Room
SUBDIVISIONS OF A
DARKROOM
A darkroom is divided into two main sections to
streamline the workflow and ensure proper film
handling:
DRY SECTION
WET SECTION
1.This is the area where
unexposed and
exposed films are
handled.
- It includes film
storage, film loading
and unloading
stations, and areas
where cassettes and
film holders are
managed. - Safelight illumination
is used to prevent film
fogging while still
allowing technicians
to see.
DRY SECTION
1.This section is
dedicated to film
processing, including
developing, fixing,
washing, and drying.
- It houses chemical
tanks, an automatic
Processor (if
available), and
drainage systems. - Proper ventilation is
required to remove
chemical fumes and
maintain air quality.
WET SECTION
plays a crucial role in
preventing unwanted light exposure, which can
damage films. It should be designed to maintain a
completely light-proof environment while allowing
easy access for radiographers.
darkroom entrance
TYPES OF
DARKROOM
ENTRANCES
Single door
Light lock or double door system
labyrinth or maze entrance
revolving door
1.Suitable for small X-ray departments with
limited personnel.
2 The door must have a
secure inside lock to
prevent accidental
opening during film
processing.
- While effective, it
requires strict control
to prevent light leaks.
SINGLE DOOR
- Consists of a small hallway
with two doors:
One door leads into the
darkroom.
The other is used as an
exit.
- A mechanical interlock
prevents both doors from
being open at the same
time, ensuring that no
light enters the darkroom. - This design allows
continuous film
processing without
interruptions.
Light Lock or Double Door System
1.A zigzag hallway leading into the darkroom,
eliminating the need for doors.
- The maze structure prevents external white light
from entering.
3.Allows for better air circulation while maintaining a
dark environment.
- Walls and ceilings are painted with non-reflective
paint to reduce any unwanted light reflection.
Labyrinth or Maze
Entrance
1.Considered the most effectiventrance design.
- Features a master door with two openings:
One from the outside.
One leading into the darkroom.
3 .The inside door has only one opening, ensuring light
protection.
- This design allows for uninterrupted workflow while
preventing light leaks.
Revolving Door
