RT208 LEC QUIZ

• a light tight room in which the processing of radiograph is carried out

  Radiographic Darkroom
• Designed to prevent/protect film from exposure to white light and ionizing radiation during handling and processing.

  Radiographic darkroom
• ______ times more sensitive to subsequent exposure than unexposed film

  2-8
• Enought space for


  Working bench and working table

  Cabinet

  Storage of film and chemicals
• What is the distance of dry section to wet section

  4 ft
• Dry section 


  Storage area of film

  Storage area of cassette

  Storage area of solutions

  Workbench

  Passbox
• Wet section

  Manual tank

  Automatic processor

  Hanger

  Safe light
• Radiography/day

  200
• Concrete is greater than

  6
• Hollowed block is filled of

  Cement
• Wood: with 


  1.5 mm pb
• All automatic processor are located inside 


  Totally inside
• What are the disadvantage of totally inside

  Increase heat/temperature noise and humidity and moist
• • All automatic processor are located inside but the drop tray is located outside.
  • More advisable

  Bulk inside
• Advantage of bulk inside 


  Decrease heat/temperature noise and humidity and moist
• • ∙ Only the feed tray is located inside
  • Used only when the darkroom is small

  Bulk outside
• Air change

  8 - 10 hours
• Air inside the darkroom

  Air movement
• Storage temperature of darkroom

  10-21 celcius/50-70 farenheit
• Old darkroom temperature

  20 celcius/ 67-83 Fahrenheit
• New darkroom temperature

  18 - 24 celcius/ 65 - 85 Fahrenheit
• Humidity for storage room and darkroom

  40 - 60

  30 - 60 (new for dr)
• The simplest type Need to provide a passbox

  RATIONALE: avoid RT in entering the darkroom

  Single darkroom door
• • Used only when there is darkroom personnel exclusive in the darkroom.
  • If door 1 is open, door 2 is closed

  Double door darkroom
• Zigzag type

  Used only when the darkroom is large

  RATIONALE: it requires more space

  Labyrinth/maze
• The fast access type

  RATIONALE: can enter and exit at the same time

  Revolving door
• Allows the film to transfer without entering the darkroom.

  Has an interlocking/alarm.

  Passbox/Film cassette transfer cabinet
• source of overhead lighting for general purposes such as cleaning, changing solutions and carrying out of other procedures that do not require safelight illumination.


  White light illumination
• are lamps with color filters that provides sufficient illumination in the darkroom but ensures that the film remains unexposed.

  Safelight illumination
• What are the two type of safelight

  Direct saftelight

  Indirect safelight
• What is the distance of direct

  3 ft
• What is the distance of indirect

  4 ft
• Filters out Red, Orange and Yellow colors

  APPEARANCE: brownish

  For monochromatic film

  (blue-sensitive film)

  Amber filter
• Filters only the intensity

  For monochromatic film (blue-sensitive film)

  ALTERNATIVES: Amber filter & Kodak Mor-lite


  Wratten 6b filter
• Filters out intensity and color (Yellow and Orange)

  For orthochromatic film (blue/green sensitive film)

  Multi-purpose filter

  APPEARANCE: red color

  GBX 2 filter
• reflectance of safelight

  Pastel and light
• Easy to clean and durable 


  Enamel and epoxy
• it will not reflect white light

  Matte finish not glossy
• should be appropriately installed

  always check on loose wires

  Electrical wiring
• Fixture type safelight

  Light is distributed directly

  Most common in the hospital

  Direct safelight