Lesson 2.3 Flashcards
Proper ventilation is essential in a radiographic darkroom to create a comfortable working environment for radiologic technologists while maintaining film quality and chemical stability
Darkroom Ventilation
Importance of Ventilation
A well-ventilated darkroom helps maintain a conducive atmosphere, making film processing more
efficient.
Proper air-conditioning protects films in storage and prevents the evaporation of processing chemicals, which can affect film development.
Humidity Control
40% - 60%
Leads to reduced contrast and increased fog in radiographs.
Above 60%
Increases the risk of static artifacts,
which appear as unwanted marks on the film.
Below 40%
Temperature Regulation
19.44-20°C
(67 degree F - 68 degree F)
High temperatures reduce image contrast and increase film fog.
10°C
(50 degree F)
A film could be stored for a long period if the temperature maintained.
Airflow Requirements
15-25 FT/MIN
1 Air movement in the darkroom should be maintained at 15 to 25 feet per minute to prevent chemical vapor buildup.
2 Positive air pressure should be maintained inside the processing
room to prevent dust and external contaminants from entering
The film dryer should have a separate duct leading outside the darkroom to
remove excess heat and humidity
Dryer Exhaust
Incoming air should pass through filters to remove dust particles, preventing
contamination of film and chemicals.
Filtered air intake
may be installed for additional air circulation, especially in darkrooms without built-in air conditioning.
Electric Fan
ensures film quality, chemical stability, and a safe working environment. Regulating humidity, temperature, airflow, and exhaust systems will prevent film damage, minimize fogging, and maintain optimal radiograph contrast.
Proper Ventilation
