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RT 210 > 1. Processing room design > Flashcards

1. Processing room design Flashcards

1
Q

Darkroom Characteristics

A 
-Room Humidity and
Temperature
-Construction
-Drainage and Water Supply
-Lighting and Ventilation
-Film and Chemical Storage
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2
Q

the unseen change in the atomic structure of the crystal lattice that results in the production of a visible image

A

Latent Image

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3
Q

The function of a radiographic ______ is to protect the film from white light and ionizing radiation during handling and processing

A

darkroom

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4
Q

Countertops and other work surfaces
should be grounded to reduce the risk
of static electricity

A

-Proper Film Handling
-Maintaining the range of 30-60%
relative humidity

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5
Q

Proper ventilation to prevent buildup

of heat and humidity

A

-Temperature should be maintained

in the range of 65-75°F (18-24°C)

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6
Q

Darkroom walls should be
painted in _____ and _____ to increase reflectance of light
emitted from the safelight

A

pastels,

light color

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7
Q

Darkroom walls should have _______ to protect the personnel and
prevent fogging of the film

A

appropriate lead shielding

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8
Q

Darkrooms should have adequate water

supply and drainage

A

-Old processors - hot and cold water
-Modern processors - cold water
-Adequate drainage - can handle
2.5x maximum outflow (10 gallons
per minute or 38L/min)

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9
Q

Darkrooms should have adequate ______ for film and chemicals,
and appropriate film transfer systems

A

storage space

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10
Q

Darkroom door should be designed to
keep people from entering the room
while the films are being processed

A

Single-hinged door
Double door entrance
Revolving doors
Maze-type entrance

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11
Q

Simplest and cheapest

A

Single hinge doors

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12
Q

Weather stripping around door frame

A

Single hinge doors

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13
Q

Can cause accidental exposure to white light

A

Single hinge doors

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14
Q

Has 2 doors and a hallway

between them

A

Double door entrance

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15
Q

One cannot be opened unless

the other is closed

A

Double door entrance

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16
Q

Can cause accidental trapping

A

Double door entrance

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17
Q

Most efficient but the most

expensive type

A

Revolving door

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18
Q

Composed of 2 cylinders, a fixed outer cylinder, and a

revolving inner cylinder

A

Revolving door

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19
Q

Does not use a door at all.
Instead, there is a minimum of 2
hallways that run parallel to each other

A

Maze-type entrance

20
Q

Takes up too much floor space

A

Maze-type entrance

21
Q

No restriction in area access

A

Maze-type entrance

22
Q

Darkrooms should have 2 types of lighting:

A

the overhead lights and

safelights

23
Q

necessary for
cleaning, maintenance, and possible
emergencies

A

Overhead lights

24
Q

a light source that emits
wavelengths to which particular types
of film are not sensitive

A

Safelight

25
Q

Safelight must be mounted at least _____
from feed trays or loading
counters

A

3-4 ft

26
Q

A _____ bulb is

recommended for single emulsion film (Safelight)

A

7.5W or 15W

27
Q

Common type of film used in screen cassettes

A

Blue-Violet sensitive Film

28
Q

is primarily sensitive to

the colors blue, indigo, and violet

A

Blue-Violet sensitive Film

29
Q

Blue-Violet sensitive Film normally uses a _____ safelight

A

amber colored

30
Q

Blue-Violet sensitive Film

Common types of filter are

A

Kodak Wratten 6B or Kodak Mor-Lite

31
Q

Generally sensitive to the GBV portion

of the visible spectrum

A

Orthochromatic Film

32
Q

Orthochromatic Film normally uses a _____ safelight

A

pure red

33
Q

Orthochromatic Film

Common types of filter are

A

Kodak GBX series

34
Q

Generally sensitive to red-amber light

spectrum

A

New Modality Film (Red-amber sensitive film)

35
Q

New Modality Film normally uses a _____ safelight

A

dark green

36
Q

New Modality Film

Common type of filter is the

A

Kodak Number 7

37
Q

Sensitive to all colors of the visible spectrum

A

Panchromatic Film

38
Q

Cannot be exposed to any safelight

A

Panchromatic Film

39
Q

Safelight testing should be done

A

semiannually

40
Q

Safelight testing should be done ____ frequently if problems are found

A

More

41
Q

Safelight testing should be done if ____ are changed

A

filters

42
Q

Safelight Testing

A
  1. Verify proper distance, check bulb
    wattage, and inspect filter for cracks
    and pinholes.
  2. Load a cassette with fresh film
  3. Place the cassette on the radiographic
    table with 40 SID
  4. Place the step wedge on the center of
    the cassette and expose.
  5. In the darkroom, lay exposed film on
    counter and cover half with an opaque material.
  6. Expose the film to normal safelight
    conditions for 2 min and then process film.
  7. Place film on viewbox illuminator and
    observe for defined line or break between
    halves.
43
Q

Leakage testing and

Processing Area Condition

A
  1. Turn on all white lights surrounding
    darkroom. Inside the darkroom, shut off
    all lights.
  2. After eyes adapt to dark, check for white
    leaks.
  3. Turn on overhead lighting and inspect
    area
  4. Check ventilation and temperature of
    area.
  5. Check film storage area.
  6. Correct any problems or deficiencies.
44
Q

Films should be stored in areas with a temperature of _____ and a relative humidity of _____

A

55-75° F (13-24°C) ,

30-60%

45
Q

Chemicals should be stored in areas with a
temperature of ______.
Temperature should not exceed ______ for long periods

A

40-85°F(4-30°C),

70°F(21°C)

46
Q

It is best not to store film and chemicals

_____ each other

A

near

RT 210 (9 decks)

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