RC > QAQC > Flashcards

QAQC Flashcards

(81 cards)

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1
Q

fidelity of image

A

radiographic film quality

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2
Q

radiographic film quality are described by ____ and ____ factors

A

photographic and geometric factors

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3
Q

visibility of image

A

photographic factor

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4
Q

2 photographic factors

A

density and contrast

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5
Q

2 geometric factors

A

distortion and detail

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6
Q

darkness or blackness of image

A

radiographic density

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7
Q

radiographic density is evaluated by ____

A

optical density

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8
Q

measures the blackness of image

logarithmic function of original light intensity to the transmitted light intensity

A

optical density

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9
Q

⬆️ density = ___ OD

A

⬆️ density = ⬆️ OD

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10
Q

0 OD = ____ transmission

A

no transmission

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11
Q

Dmax = __ OD

A

4 OD

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12
Q

Dmin = 0.1 - ___

A

0.1 to 0.3

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13
Q

base density 0.11 - ___ OD

A

0.11 to 0.15 OD

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14
Q

fog density 0.15 - __ OD

A

0.15 to 0.18 OD

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15
Q

optimal density

A

0.25 to 2.5

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16
Q

used to measure the blackness

A

densitometer

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17
Q

density = direct (DaPaSaKaMa)

A

Destructive
Processing
Speed
kVp
mAs

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18
Q

density = inverse (OBCCSFG)

A

OID
Beam Restriction
Characteristics of Tissue (ATM)
Constructive
SID
Filtration
Grid

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19
Q

contrast = direct (OBGCC)

A

OID
Beam Restriction
Grid
Characteristics of Tissue
Contrast Media

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20
Q

contrast = inverse (3FiTE)

A

Fog
Filtration
Field Size
Thickness
Energy

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21
Q

shape distortion (PASS)

A

position
angulation
shape
size

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22
Q

sharpness of image and absence of blurring

A

detail

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23
Q

shadow of image or extra images on lateral side

A

penumbra

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24
Q

focal spot is in circular shape = __ penumbra

A

no penumbra

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25
focal spot is line = __ penumbra
with penumbra
26
focal spot is angulated = __ penumbra but ___
with penumbra but not even
27
best way to control motion
⬇️ exposure time
28
best way to control involuntary motion
immobilization
29
best way to control voluntary motion
px instruction
30
radiolucent positioning aids/foam are used
immobilization
31
⬆️ speed = ___ blurring
⬆️ blurring
32
⬆️ thickness = __ absorption penumbra
⬆️ absorption penumbra
33
in 1860, she was the first to use systematic approach in collecting and analyzing mortality rate in hospital
Florence Nightingale
34
in 1927, he proposed the planning function and execution be separate and that numerous individuals be assigned specific tasks with production process
Frederick Taylor
35
in 1980, they proposed the quality improvement concept that combines quality control with overall management philosophy that gives input to all persons involved in the process of creating specifc goods and services
Joseph Juran and Edward Deming
36
in 1984, they organized workshop in QAQC in radiology in Germany emphasizing the practical aspects of QA including improved image quality, for optimal diagnosis, cost containment and dose reduction
WHO - World Health Organization
37
organized effort of a facility to ensure the high standard of quality of its product
quality assurance
38
its purpose is to provide adequate diagnostic information with the least possible radiation exposure to patient
quality assurance
39
set of test that ensures the efficiency of equipment
quality control
40
level _ = non invasive and simple
level 1
41
level _ = noninvasive and complex
level 2
42
level _ = invasive and complex
level 3
43
QAQC Team
chief radiologist chief tech radiologist hospital physicist xray tech/rad tech
44
QAQC Committee
chief of hospital administrative officer chief radiologist chief radtech chief medical physicist head of hospital engr
45
luminous timer frequency
weekly
46
luminous timer equipment needed
darkroom interval timer watch another clock
47
safelight test 24hrs / 7days / 1week
annually
48
safelight test 12hrs / 7 days / 1week
every 2 years
49
to assure that the safelight and other potential sources of unsafe light will not fog the film
safelight test
50
unwanted images on radiograph
artifacts
51
artifact caused by voluntary or involuntary movement
motion blur
52
exposure artifact caused by broken cassette
light leak
53
artifact caused by poor film screen contact or air gap
poor film screen contact
54
artifact caused by two exposures, twin artifact
double exposure
55
artifact that can be artifactual or pathological
foreign body
56
artifact caused by inversed cassette where back cover is placed in contact with patient
cassette upside down
57
artifact that caused by two grids in a single exposure
moire/zebra
58
artifact caused by bending or crease of film
kink marks
59
artifact caused by sweaty and greasy hands
fingerprint marks
60
artifact caused by long fingernails
crescent artifacts
61
artifact caused by inadequate washing and retained fixer solution in film
hyporetention
62
artifact caused by low humidity and temperature with friction
static artifact
63
artifact caused by too tight entrance of processor
entrance roller mark
64
artifact cahdrd by dirty rollers
roller mark
65
artifact caused by insufficient chemical condition/concentration or oxidized developer
chemical fog
66
artifiact that occurs at every 3.14" intervals
Pi Lines
67
artifact caused by improperly positioned guide lines
guide shoe marks
68
artifact caused by two films that simultaneously placed during processing
kissing artifact
69
artifact caused by abrupt change in solution's temperature
reticulation artifact
70
artifact caused by overagitation
air bell artifact
71
artifact caused by sudden shut down of processor when electricity fluctuates
hesitation artifact
72
artifact caused by improper squeezing of films
curtain artifact
73
artifact caused bg incosistent movement of rollers
chatter artifact
74
artifact caused by improper hardener or dryer
brittle appearance
75
artifact caused by insufficient washing
greasy appearance
76
artifact caused by under replenish fixer
milky appearance
77
lead apparels should not be ___
folded
78
environmental inspection performed ___ for mechanical and electrical safety
annually
79
xray light should be on the ___ of the table whether SID is increased or moved on table for vch
center
80
used to check for kVp exposure if densities are equal
wisconsin cassette
81
uses HVL that needs a dosimeter to measure the dose
filtration
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