Test 4 Unit 5

Question 1

Basic rules of film processing

Answer 1

standardize procedures

keep clean and well maintained

Question 2

location

Answer 2

adjacent to exposure room

Question 3

radiation protection

Answer 3

ensure no exposure to the darkroom

Question 4

size

Answer 4

6’x8’

Question 5

environment

Answer 5

tight light

Question 6

work area

Answer 6

dry and wet areas. Formica tabletop.

Question 7

plumbing

Answer 7

hot and cold for mixing chemicals and cleaning processor. hardness of water can affect film

Question 8

electrical

Answer 8

110V to operate

Question 9

ventilation

Answer 9

should ventilate chemical vapors/odors

Question 10

film storage

Answer 10

clean, dry, low humidity. 50-70 degrees. Stand on edge, not stacked or flat

Question 11

commercial film bin

Answer 11

many have a security systems that prohibits bin from being opened with light on

Question 12

passbox

Answer 12

metal lined box installed in the darkroom wall to safely pass exposed and unexposed cassettes

Question 13

Chemical protection

Answer 13

rubber gloves, aprons, eye wash, MSDS sheets

Question 14

Exam room Walls

Answer 14

primary 1/16” lead, 7 ft tall

secondary 1/32” to the ceiling

Question 15

dark room entrances

Answer 15

maze, rotatrek, double door, single door

Question 16

Patient ID marking system

Answer 16

patient ID info is flashed onto film after it has been exposed and before processing

Question 17

wall color

Answer 17

light colors reflect light which help keep safelight intensity to a minimum

Question 18

types of light needed

Answer 18

overhead - higher than usual

safelight - lower at regular level

Question 19

safelight

Answer 19

red. GBX-2 filter is common for both blue and green sensitive film

Question 20

exposed film is _____ x more sensitive to light of all wavelengths

Answer 20

10

Question 21

Post Exposure Fog (PEF)

Answer 21

results from exposure to the film after initial X-ray exposure but before processing

Question 22

Ways to reduce PEF

Answer 22

safelight wattage below 15W (preferred 7.5W)
4’ distance to work area, indirect lighting
use a single safelight
eliminate white leaks

Question 23

Kodak Safelight Test

Answer 23

designed to determine the safe handling time of unexposed and exposed film under safelighting conditions. Prexpose half of 8x10.

Question 24

Processing time is determined by…

Answer 24

developer temperature and concentration

Question 25

an increase in temperature =

Answer 25

shorter developing time

Question 26

a decrease in concentration=

Answer 26

shorter developing time

Question 27

automatic processing

Answer 27

mechanized, faster, less variable, more initial expense

Question 28

manual processing

Answer 28

hand tanks, time consuming, variable, lower start up costs

Question 29

Autoprocessor components

Answer 29

``` roller transport system temperature control system chemical system replenishment system circulation/filtration system drying system electrical system ```

Question 30

The processing cycle

Answer 30

Develop Fix Wash Dry

Question 31

transport system

Answer 31

1"&3" rollers that move film in and out of tanks.

Question 32

entrance roller

Answer 32

grabs film

Question 33

deep racks

Answer 33

move film through solutions

Question 34

turnaround rollers and guide shoes

Answer 34

push film upward

Question 35

crossover

Answer 35

moves film to next tank

Question 36

squeegee

Answer 36

removes excess liquid before drying

Question 37

Developer

Answer 37

turns latent image into manifest image. film density and contrast established here, odorless and clear with a light amber appearance. temp should be monitored on daily start up

Question 38

primary wall

Answer 38

directly behind bucky

Question 39

secondary wall

Answer 39

to the right or left of bucky

Question 40

hydroquinone

Answer 40

reducing agent. slow acting agent responsible for dark tones on film. Time and temperature sensative

Question 41

phenidone

Answer 41

reducing agent. fast acting agent responsible for gray tones on film. works on lighter areas of exposure. time and temperature sensitive

Question 42

Glutaraldehyde

Answer 42

hardener. keeps emulsions from over-swelling

Question 43

reducing agents

Answer 43

in developer. responsible for building film density and contrast

Question 44

Fixer

Answer 44

1. stops developing process 2. removes undeveloped silver from the film 3. shrinks and hardens the emulsion

Question 45

acetic acid

Answer 45

acidifier. stops the developing process on contact

Question 46

aluminum chloride

Answer 46

hardener. shrinks and hardens emulsion

Question 47

dryer

Answer 47

infrared dryer operating at 120F. dries film in under minute

Question 48

temperature control system

Answer 48

developer heater core and a thermal sensor in the developer tank, and a modular control unit.

Question 49

a ____ % swing in temp is enough to double or cut film density in half

Answer 49

3

Question 50

how long to table top processors take to stabilize developer temperatures?

Answer 50

15-20 minues

Question 51

Never insert a _______ thermometer into the processor

Answer 51

mercury

Question 52

recirculation

Answer 52

agitates developer solution. stabilizes temperature. should be between 90-95F. filters sediment