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Quality Management Test 1 > Test 3 > Flashcards

Test 3 Flashcards

1
Q

What are the three main parts of fluoro equipment

A

X-ray tube/ generator
Image intensifier
Video monitoring device

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2
Q

Fluoro generators

A

3 phase or high frequency; max efficiency

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3
Q

How does an image intensifier brighten image

A

By converting a low intensity full size image to a high insides minifies image

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4
Q

Input phosphor does what

A

Take xray to light

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5
Q

Input phosphor is made of

A

Cesium iodide

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6
Q

What does a photo cathode do

A

Change light to electrons through the process of photoemission

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7
Q

What is the photocathode made out of

A

Cesium antimony

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8
Q

What is the potential difference between the anode and photocathode

A

25-35kv

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9
Q

What does the output phosphor do

A

Change electrons to bright light

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10
Q

What is the output phosphor made of

A

Zinc cadmium sulfide

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11
Q

The image from the larger input phosphor is condensed into the smaller output phosphor. Bc the image is emitted from a smaller area it appears to be brighter is the process of what

A

Minification gain

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12
Q

The formula for mini fixation gain is

A

(Input/output)^2

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13
Q

A high voltage accelerates electrons from the photocathode and their kinetic energy is increased causing many times more light photons from the output phosphor surface describes what

A

Flux gain

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14
Q

Formula for flux gain

A

of output light photons/ #of input xray photons

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15
Q

Factors that affect the brightness of fluoro images

A

MA
Kvp
Pt ️thickness/ tissue density
Automatic brightness control

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16
Q

What allows fluoro unit to automatically maintain the brightest level of the image for variations of pt ️thickness and attenuation

A

Abc

Automatic brightness control

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17
Q

What is considered the principle source of medical radiation to US population

A

Fluoro

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18
Q

How is an image magnified

A

By changing the voltage on electrostatics lenses which decreases the amount of the input phosphor image sent to the output phosphor

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19
Q

Is mA increased or decreased when usin mag mode

A

Increased

Increasing pt dose

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20
Q

A decrease in image brightness at the lateral portions

A

Vingetting

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21
Q

Oldest method of monitoring image from image intensifiers

A

Mirror optics

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22
Q

The most common method for monitoring the fluoro image

A

Closed circuit TV monitoring (vidicon)

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23
Q

Uses high speed motion picture camera that records images of fast moving object

A

Cinefluorography

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24
Q

Uses a spot film camera that takes a static radiograph of the fluoro image

A

Photoflurospot or spot film camera

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25
Q

Visual inspection to flouro machine is done how often

A

6mths

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26
Q

Environmental inspection I done how often

A

6mths

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27
Q

Fluoro equipment should be tested horizontally t/f

A

False vertical and horizontal

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28
Q

Image field vs radiation field

A

Checks congruency
Uses a fluoro beam alignment tool
Within 2% o SID

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29
Q

High contrast ️resolution

A

Test to determine ️resolution present and ability to resolve small thin black and white areas

Took used is a fluoro high contrast ️resolution test tool

Good: 40 center 30 periphery

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30
Q

Low contrast ️resolution

A

To determine ability to resolve large objects that differ slightly from surrounding area

Tool used low contrast ️resolution test tool

Good when contrast holes and surrounding area is 2%

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31
Q

Fluoro exposure

A

To demonstrate exposure levels around fluoro unit

Tool used ionization chamber

Good when no exposure is read through curtain

Use stopwatch fluoro for 30 sec with and without curtain use inverse square law

32
Q

What is a way to track pt exposure with digital imaging

A

DAP AND KAP
Dose area product and air Kerma product

Meters used in rooms to estimate skin doses

33
Q

Basic QC procedures for digital

A

Check CR system (cr reader must be cleaned and image plates should be erased daily)

DR image receptors must be kept clean

Check performance of display monitor

34
Q

Less than ______% below the ideal exposure can create quantum Mottle

A

60

35
Q

All monitors used for interpretation should be tested at least _____

A

Monthly

36
Q

Shading uniformity test

A

T= laser jitter test
️resolution chart = spacial accuracy/sharpness
Circles on side of T= contrast evaluation
Relative sensitivity test= s#’s shouldn’t vary more than 20%

37
Q

Computer system that manages image to electronic form. A network infrastructure that distributes images within and outside facility

A

PACS

38
Q

Electronic medical record

A

HIS

39
Q

Electronic medical record specific to the radiology dept

A

RIS

40
Q

Exchanges and stores medical information between different systems or different equipment

A

DICOM - digital image communication in medicine

41
Q

Histogram graph
X axis =
Y axis =

A 
X= amount of exposure
Y= the number of pixels
42
Q

Used to alter tonal qualities o image by mapping values of exposure intensity to desired brightness. ️Contrast can be adjusted by changing slope, brightness can be adjusted by moving line up or down the y axis

A

LUT look up table

43
Q

Measure how well image quality is being displayed (how much information is lost from incoming to display)

A

DQE detective quantum effluence

44
Q

Is DQE better with DR or CR

A

Dr

45
Q

Percentage of pixel area that is sensitive to the image signal.

A

Fill factor

46
Q

Current system have a fill factor of _____%

A

80

47
Q

Abscess

A

Additive
Chest with a sac like structure in left lung
A sac o pus

48
Q

Atrophy

A

Destructive
Shoulder joint
Degeneration of cells to tissue or organs

49
Q

Bowel obstruction

A

Destructive
KUB with airy bowel
Obstruction of bowel preventing normal transit of waste

50
Q

Active osteomyelitis

A

Destructive
Funky toes/ 1/2 a foot
Inflammation o the bone due to infection

51
Q

Pulmonary edema

A

Additive
Lung with lower 2/3 white out
Excess fluid in the lungs

52
Q

Tumor

A

Additive

Chest with grey spot by aorta

53
Q

Atelectasis

A

Additive
Chest with entire right side white out
Collapsed lung

54
Q

Aseptic necrosis

A

Destructive

Carpal bones with black arrows

55
Q

Emphysema

A

Destructive

Chest with long dark lungs

56
Q

Bronchiectasis

A

Additive

Chest with right lung cloudy lower 1/2

57
Q

Plural effusion

A

Additive

Chest with right angle whited out left angle clipped

58
Q

Aortic aneurysm

A

Additive

Chest with large aorta

59
Q

Cardiomegaly

A

Additive

Chest with large heart shadow

60
Q

Fibrosarcoma

A

Destructive

Hand with fingers clipped

61
Q

Aerophaigia

A

Destructive

KUB minus the pubic symphysis CT IMAGE IN LOWER LEFT

62
Q

Gout

A

Destructive

Large great toe

63
Q

Carcinoma

A

Destructive

Pelvis with 1/2 deteriated

64
Q

Chronic osteomyelitis

A

Additive

Knee

65
Q

CHF

A

Additive

Chest with lt written in ink

66
Q

Pneumonia

A

Additive

3 CXR

67
Q

TB

A

Additive

Chest with cloudy upper right lobe and arrows

68
Q

Calcified stone

A

Additive

Bladder shot with huge stone

69
Q

Osteomalacia

A

Destructive

Hip

70
Q

Osteoporosis

A

Destructive

Hunch back lateral Chest

71
Q

Osteolytic metastasis

A

Destructive

Pelvis with yellow arrow

72
Q

Arthritis

A

Destructive

Lateral c spine

73
Q

Pneumothorax

A

Destructive

Chet with right love collapses

74
Q

Paget’s disease early stage

A

Additive

Pelvis with Swiss cheese ala

75
Q

Pneumoectomy

A

Additive

Chest with right side whited out

76
Q

Osteochondroma

A

Additive

Knee with colliflower

77
Q

Emphyma

A

Additive

Chest with 1/2 right side white and cloudy distinctive lateral boarder

Quality Management Test 1 (3 decks)

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