RT103

Question 1

is designed for handling and storage of x-ray film

Answer 1

darkroom

Question 2

are passed into the darkroom as a passbox

Answer 2

film cassettes

Question 3

pass boxes have 2 sides

Answer 3

exposed and unexposed

Question 4

a typical size for darkroom is

Answer 4

2.0 x 3.0 meters

Question 5

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

Answer 5

The lock entrance

Question 6

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

Answer 6

The labyrinth or maze

Question 7

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

Answer 7

sodium vapor safelights

Question 8

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

Answer 8

LED

Question 9

safeness of light depends on

Answer 9

distance
wattage of bulbs
spectral sensitivity
length of time
filter interact

Question 10

instrument used to measure blackening on radiographs

Answer 10

densitometer

Question 11

darkroom is installed in two distinct parts namely

Answer 11

dry side and wet side

Question 12

Wet side have at least 4 tanks:

Answer 12

developing tank
tank for rinsing
fixing bath
tank for washing

Question 13

what is the humidity range

Answer 13

40-60%

Question 14

what is the temperature range

Answer 14

20°C to 21°C

Question 15

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

Answer 15

Psychrometer

Question 16

A device used to measure environmental moisture

Answer 16

Hygrometer

Question 17

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

Answer 17

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

Question 18

is a device used to measure viewbox illumination intensity

Answer 18

photometer

Question 19

Photometers measures:

Answer 19

illuminance
irradiance
light absorption
scattering of light
fluoresensce
phosphorescence
luminiscence

Question 20

used for capturing displaying and storing radiographic images

Answer 20

medical x-ray film

Question 21

coating is done generally in 3 layers

Answer 21

substratum layer
emulsion layer
top coat layer

Question 22

the foundation or support that allows the film to maintain shape

Answer 22

Base

Question 23

is a blue tinted

Answer 23

modern x-ray film

Question 24

the film base was originally composed of

Answer 24

glass plate

Question 25

the glass plate was replaced using

Answer 25

cellulose nitrate

Question 26

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

Answer 26

polyester

Question 27

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

Answer 27

supercoat

Question 28

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

Answer 28

adhesive

Question 29

two most importang ingredient of a photographic emulsion are

Answer 29

gelatin and silver halide

Question 30

is chemically a colloid

Answer 30

gelatin

Question 31

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

Answer 31

from bone, cattle bone

Question 32

is the light sensitive material in the emulsion

Answer 32

silver halide

Question 33

is the invisible change induced in the various silver halide crystals

Answer 33

The latent image

Question 34

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

Answer 34

resolution

Question 35

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

Answer 35

spectral sensitivity

Question 36

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

Answer 36

film speed

Question 37

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

Answer 37

film speed

Question 38

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

Answer 38

reciprocity law

Question 39

is designed to provide an exact image of the original film

Answer 39

duplication film

Question 40

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

Answer 40

substraction film

Question 41

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

Answer 41

sensitometry

Question 42

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

Answer 42

densitometer

Question 43

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

Answer 43

protective coat

Question 44

the active layer of intensifying sreen

Answer 44

phosphor layer

Question 45

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

Answer 45

luminiscence