問題一覧
1
Intensifying-screen speed increases with increasing
phosphor thickness
2
Intensifying screens are used in conjunction with radiographic film to
lower the mAs is necessary to produce a proper radiograph
3
Most facilities would be sure that the automatic processor was
cleaned weekly
4
Which of the following is not a rare earth element?
yttrium
5
Double-capacity processors can process a film in
180 sec. or 3 mins
6
What is chemical having a high hydrogen potential (H+)?
acids
7
In establishing a processor maintenance program, which of the following would not be included?
productive maintenance
8
Screen unsharpness
Is the loss of sharpness of the image when screens are used
9
The film base commonly used during the years 1900 until 1924 was:
cellulose nitrate
10
Which of the following best describes an example preventive maintenance?
changing motor oil every 3000 mi
11
Circulation of the developer at the rate of approximately will ensure adequate Agitation,
15 liters per min
12
If a radiograph turns yellow during storage, it may be the result of
incomplete washing/hyporetension
13
Radiographs begin coming out too dark from one particular processor in the department. This could be a result of which f the following?
increased developer temperature increased developer time
14
Which of the following factors controlled by the technologists affects screen speed most?
kVp
15
The replenishment system is critical. Therefore
Fixer replenishment should be about 100ml for each 1 in of film
16
The classification of artifacts includes all except
location artifacts
17
Scheduled maintenance does not include
part replacement
18
Phosphor afterglow
is also called lag
19
What is the active ingredient of the radiographic film emulsion?
silver halide crystal
20
Which of the following artifacts might be associated with poor processing?
pi lines
21
The purpose of a stop bath is to
remove excess developer from the emulsion
22
The resolution achievable with intensifying screens is approximately?
10 1p/mm
23
The repeat rate is described by which of the following:
should be determined quarterly
24
The patient exposure for a direct-exposure chest x-ray examination is 210 mR (54 uC/KG) If par speed screens are used, the exposure required is 15mR (3.9 uC/kg). The intensification factor is
14
25
Between the fixing tank and the wash tank, the film passes through a
crossover rack
26
When cleaning a processor, which tank should always be filled first?
fixer
27
The transport system includes all but the following
drying chamber
28
Which of c of an automatic processor?
development system
29
What temperature that a processed radiograph be stored?
70°F and 60% humidity
30
What are the Primary agents of the developer?
reducing
31
The principal purpose of the circulatory system is to
agitate the chemistry/film
32
The action of the developer is controlled by which of the following
time temperature activity
33
With a 90-s processor, immersion time in the developer is approximately
20 sec/22 sec most accurate
34
Which types of test can use a Wisconsin test cassette?
kVp measurement
35
When a portion of the radiographic image appears blurred, it is due to:
poor screen film contrast
36
What is a strong acid that can burn the eyes and irritate the skin?
fixer
37
Which of the following types of artifact is most distinctive and identifiable?
pi lines
38
Which of the following is considered a special starter solution must be added to the replenisher when starting a fresh tank of developer?
acetic acid potassium bromide
39
The first step in processing is designed to
soften the emulsion
40
Which of the following is not a necessary part of a quality assurance program?
determination of film-base thickness
41
What is the most common cause of contamination of the solutions?
splashing
42
According to quality assurance programs, how often should the chemicals be changed in a processor?
once a month
43
What formulae is necessary to compute the actual volume of the tanks capacity by liters?
Width x length x depth-2.5cm divided by 1000
44
Which of the following is not part of the transport system?
fluid pump
45
The distinct patterns of static artifacts do not include
finger static
46
Replenishment of which tank in the processing system is not important?
washing
47
Processor cleaning
takes no more than few minutes
48
What chemical is effective only in alkaline solution?
glutaraldehyde
49
What solution that provides acidic pH and stops reduction?
activator
50
The invisible image that is produced in the film emulsion by exposure to light or x-rays is called the:
latent image
51
Artifacts caused by wet pressure sensitization usually occur:
in developing tank
52
What is the safety precaution against leaks and overflow?
drains/drainage
53
What techniques that makes it difficult to maintain quality control and to complete the Processing tasks is a reasonable period of time?
hand processing
54
Film transfer system is also known as:
passbox
55
What is the optimal reducing agent temperature for an immersion time for 4-8mins?
20°C
56
The segment of the circulation system most likely to contain a filter is
developer
57
Once x-ray interaction with a phosphor produces light isotropically
the light spread out
58
When a large film is inserted into an automatic processor,
short dimension should be against the rail
59
Control of the replenishment system is accomplished by a
microswitch
60
What subsystems is used to bend and turn the him when it reaches the top of the transport Rack must be directed down into the next section?
crossover network
61
What functional unit of measurement for image sharpness?
Lp/mm
62
At what stage in automatic processing is the latent image made visible?
developing
63
Which of the following equipment’s is required to produce a uniform range of densities of a Film:
sensitometer and penitrometer
64
The intensification factor
Is higher for rare earth screens than for calcium tungstate screens
65
The basic constituent in a developer are:
accelerator preservative and developing agent
66
When screen film is the image receptor, image quality is a trade-off among speed. Resolution, and radiographic noise. In general
as speed increases so does noise
67
Which of the following is not a required characteristics of a base for an intensifying screen?
translucent
68
A direct exposure radiograph requires 650mR (169 uC/kg). If the intensification factor of rare earth screens is 200, what would the patient exposure be?
3.25 mR
69
Why does the manufacturer pack x-ray film in metal foil?
to protect from light to moisture
70
A non-screen technique is used in radiography primarily because it
results in less blur
71
Which of the following will cause improper agitation in an automatic film processor?
broken circulation pump
72
What factor being controlled by the level of activity of the hydroquinone?
contrast
73
What solution that is dramatically affected by contamination?
developer
74
Temperature variation in older models of automatic processors are often related to changes in the
in coming water supply
75
In The formula La,O,S To the Tb
improves luminescence
76
Quantum detection efficiency (QDE) refers to
ability to absorb x-ray
77
Pi lines are so-called because
The occur at intervals of π times the roller diameter
78
How many percent of the x-ray striking an x-ray film is absorbed by the emulsion to expose It?
less than 1%
79
The time of developer immersion is critical. It should be within ______of the Manufacturer’s recommendation.
+2%
80
Failure of a system or subsystem of an automatic processor will result in
non schedule maintenance
81
Mammography conducted with detail screens results in exposures as low as 30 mR(77 UC/kg) The intensification factor for these screens is about 30. If such an examination were conducted as a non-screen procedure, what would the patient exposure be?
9000 mR
82
Which of the following is not one of the major systems of an automatic processor?
development system
83
If the developer replenishment is set too low, which of the will result?
films will show low contrast
84
adequate drying is necessary to
increase archival quality
85
Which of the following are methods of silver recovery commonly used in diagnostic imaging Department?
electrolytic metallic replacement
86
Which of the following is most likely Kilovoltage technique chart?
variable kvp technique chart/improper safelight filter
87
Film speed is affected by which of the following:
immersion time solution temperature chemical activity
88
What agent that controls the subtle gray tones early in the development process?
phenidone
89
What artifacts which occur because of rapid movement of the film in the darkroom?
tree-like static
90
Concerning luminescence, which of the following statements is true?
There are two kinds: fluorescence and phosphorescence
91
What is the primary purpose of the circulation system?
agitate the film
92
When films in the receiving bin are damp, the least likely cause is:
blower glutaraldehyde deplition
93
The minimum flow rate for wash water is ______ gallon(s) per minute
3 or 12 liters
94
What system wherein one chemical solution is physically heated and that solution is
developer solution
95
Intensifying screens are used with radiographic film to
reduce exposure to the patient
96
under-replenishment of the developer will result in a
great decrease in contrast
97
Guide shoe artifacts will be found on the _______ of a radiograph
leading and trailing edges
98
Which of the following types of artifacts is most distinctive and identifiable?
pi lines
99
All but which of the following must be optimized to ensure best image quality?
time of fixation
100
What parts of automatic processor components are ribbed to prevent wet film from sticking To a flat surface and jamming up in the processor?
squeegee