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X-RAY DARKROOM:DESIGN AND CONSTRUCTION - Coggle Diagram
X-RAY DARKROOM:DESIGN AND CONSTRUCTION
Definition
Place for handling and processing films without producing fog by exposing the film to light or x-ray radiation.
Design of Dark Room
The floors should be easy to maintain, non-porous, durable and non-slipped flooring material such as plastic tiles.
Walls and ceiling should be light in color and can easily be kept clean.
The walls should be thick and coated with barium plaster while the doors have led lining and the gaps are shielded around the door.
As for ventilation and heating, it must satisfy working condition for staff and good film handling and storage conditions.
The size should have a minimum floor area of 10 m 2 and a ceiling height of 2.5-3 m.
The entrances for the dark room are the revolving, single, double and maze.
Location of Dark Room
Away from damp and hot areas.
Obtain water and power easily.
Must be located in a strategic place and in close range to the x-ray rooms and it should be serve by hatches (pass-boxes) form nearby imaging rooms.
Processed films can be checked or sorted out through neighboring viewing area.
Contents of Dark Room
Film bin
Film I.D. Printer
Loading bench
Hatches/Pass box
Safelights
Must be 1.2 m away from work area.
Used for loading and unloading of cassettes and for processing procedure.
It can be direct or indirect.
Uses a filter which transmits a color that does not affect the film such as red filter.
Light-tight room
Ample ventilation
Warning light outside room
Lockable Door
Wall shielding if adjacent to x-ray room
Walls painted with light color to reflect safe light
Layout of Dark Room
Cassette hatches
Film storage hopper
Hangers for holding the film
Loading bench / cupboards
Automatic processor
Consists of chemical tanks , a roller transport system and a dryer system for the processing of radiographic film.
Tanks required for developer solution , fixer solution and wash tank for water .
Subsystems
Transport -
Helps the film to move through the developer , fixer , wash and dryer at a controlled and consistent speed without causing any damage.
Replenishment -
Helps to replace fresh chemicals after the loss of chemicals during processing specifically developer and fixer solution.
Temperature control -
Help to maintain the temperature of the developer solution.
Washing -
Spraywash by the help of processors situated in between the transport roller and tank immersion which is by water fed into the tank by developer/heat exchanger.
Drying -
Dried by hot air drying and infrared drying.
Recirculation -
Help to maintain solution activity and the required agitation.
Manual processor
Fixing -
The film is immersed in fixer solution for 5 minutes after rinsing .
Washing -
The film is immersed in a tank through which water is kept flowing.
Rinsing -
To remove the chemical contents of the developer from the surfaces of the film which is done by a plain rinse bath.
Drying -
Hot air drying cupboards or by rapid drier machines with temperature of 40-5- C.
Developing -
Film is immersed in developer for 4 minutes with temperature maintained at 20 C. Development will be continued if the image seems to lack expected density at 4 minutes.
