Components of Automatic ProcessorRadiographic Film Processing & Analysis | Hariette A.W. | February 4, 2009 at 16:45
1.) Temperature Control System
35 C (95 F) – the developer temperature.
“Temperature is monitored at each stage by a thermocouple or thermistator and controlled thermostatically by a controlled heating element in each tank”.
2.) Circulation System
Agitation – is necessary to continually mix the processing chemicals, to maintain a constant temperature throughout the processing tank, and to aid exposure of the emulsion to the chemical.
“Cleaning the tanks and the transport system should be a part of the routine maintenance of any processor.”
3.) Replenishment System – one way of agitation.
Neither the developer nor the fixer is replenished:
• Losses chemical balance
• The level of solution in each tank drops
• Resulting in short contact times of the film with the chemical.
60 to 70 ml. – replenishment rates of developer.
100 to 110 ml. – replenishment rates of fixer.
“If the replenishment rate is increased, radiographic contrast is slightly increased. If the rate is too low, contrast decreases significantly”.
4.) Dryer System
Wet or Damp Finished Radiograph – easily picks up dust particles that can result in artifacts.
- Is difficult to handle in a viewbox.
- When stored, it can become sticky and be destroyed.
Dryer System consists of:
• Drying Tubes
• Exhaust System
Dryer System – extracts all residual moisture from the processed radiograph so that it drops into the receiving bin dry.
Blower – is a fan that sucks in room air and blows it across heating coils through ductwork to the drying tubes.
2500 W – three heating coils capacity are used depletion of glutaraldehyde. Most processing faults leading to damp film glutaraldehyde hardener in the developer.
Drying Tube – are long hollow cylinders with slitlike opening extending the length of the cylinder and facing the film.
- they are positioned on both sides of the film as it is transported through the drying chamber.
5. Electrical System
Fuse Box – is the only part of the electrical system of importance to the radiologic technologist.