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REVIEWER > RT103 > Flashcards

RT103 Flashcards

1
Q

is designed for handling and storage of x-ray film

A

darkroom

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2
Q

are passed into the darkroom as a passbox

A

film cassettes

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3
Q

pass boxes have 2 sides

A

exposed and unexposed

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4
Q

a typical size for darkroom is

A

2.0 x 3.0 meters

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5
Q

Two doors placed one behind the other, with enough space between them to allow the person to enter and close the outer door before opening the inner one

A

The lock entrance

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6
Q

more space consuming the side walls are black, serves as completely clear sign post

A

The labyrinth or maze

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7
Q

emit an orange yellow light but their intensity is too high for direct illumination

A

sodium vapor safelights

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8
Q

they emit light in the 660 nm range, use very low power and last 10-15 yrs

A

LED

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9
Q

safeness of light depends on

A

distance
wattage of bulbs
spectral sensitivity
length of time
filter interact

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10
Q

instrument used to measure blackening on radiographs

A

densitometer

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11
Q

darkroom is installed in two distinct parts namely

A

dry side and wet side

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12
Q

Wet side have at least 4 tanks:

A

developing tank
tank for rinsing
fixing bath
tank for washing

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13
Q

what is the humidity range

A

40-60%

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14
Q

what is the temperature range

A

20°C to 21°C

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15
Q

instrument uses the difference in readings between two thermometer to measure the moisture content or relative humidity of air

A

Psychrometer

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16
Q

A device used to measure environmental moisture

A

Hygrometer

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17
Q

supply air in dakroom and humidity level ventilation condition should be between

A

15°C and 21°C and a humidity level between 40% and 60%

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18
Q

is a device used to measure viewbox illumination intensity

A

photometer

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19
Q

Photometers measures:

A

illuminance
irradiance
light absorption
scattering of light
fluoresensce
phosphorescence
luminiscence

20
Q

used for capturing displaying and storing radiographic images

A

medical x-ray film

21
Q

coating is done generally in 3 layers

A

substratum layer
emulsion layer
top coat layer

22
Q

the foundation or support that allows the film to maintain shape

A

Base

23
Q

is a blue tinted

A

modern x-ray film

24
Q

the film base was originally composed of

A

glass plate

25
Q

the glass plate was replaced using

A

cellulose nitrate

26
Q

modern radiographic film base is made of ______ introduced in 1960’s bu DuPont

A

polyester

27
Q

is a layer of hard protective gelation it makes nearly imposible to tear a radiograph

A

supercoat

28
Q

is applied to the base material before it is coated with the emulsion, it prevents bubbles

A

adhesive

29
Q

two most importang ingredient of a photographic emulsion are

A

gelatin and silver halide

30
Q

is chemically a colloid

A

gelatin

31
Q

photographic gelatin for x ray film is made from _____ mostly ______

A

from bone, cattle bone

32
Q

is the light sensitive material in the emulsion

A

silver halide

33
Q

is the invisible change induced in the various silver halide crystals

A

The latent image

34
Q

is the ability to accurately image an object, it is called detailed sharpness definition and resolving power

A

resolution

35
Q

refers to the color of light to which a particular film is most sensitive

A

spectral sensitivity

36
Q

film is also available with different sensitivity to light photons or speed

A

film speed

37
Q

is the degree to which the emulsion is sensitive to xrays or light

A

film speed

38
Q

states that the exposure of radiographic film depends on the intensity of xrays of the remnant beam

A

reciprocity law

39
Q

is designed to provide an exact image of the original film

A

duplication film

40
Q

is a fine grain clear (non-tinted) base film designed to reverse the image of a pleminary scout angiogram film

A

substraction film

41
Q

is a measurement of the characteristic responses of film to exposure and processing

A

sensitometry

42
Q

instrument that provides a readout of amount of blackening of a film

A

densitometer

43
Q

the layer of the intensifying screen closest to the xray film is the protective coating

A

protective coat

44
Q

the active layer of intensifying sreen

A

phosphor layer

45
Q

is the ability of a material to emit light in response to excitation

A

luminiscence

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