MAMMO > Quality Control > Flashcards

Quality Control Flashcards

(54 cards)

Study These Flashcards
1
Q

Frequency for medical physicist testing

A

Annual or after major repairs

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2
Q

Ensures image acquisition chain is consistently producing adequate image quality and that artifacts are not clinically significant

A

Phantom image quality

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3
Q

Frequency for phantom image quality

A

weekly, after relevant service, upon installation of new equipment

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4
Q

Required equipment for phantom image quality test

A

ACR DM Phantom and ACR DM phantom image quality form

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5
Q

What does the ACR DM phantom simulate?

A

4.2 cm compressed breast, 50/50 fat/glandular tissue

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6
Q

Objects in ACR DM phantom

A

6 fibers, 6 speck groups, 6 masses

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7
Q

T/F: Test procedures for Phantom image quality can be done in 2D and 3D

A

True

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8
Q

Typically most visible when observing the phantom image as a whole, rather than in individual sections

A

Broad-area artifacts

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9
Q

Usually best seen while observing the phantom image at the full spatial resolution where one pixel on the display matches one pixel in the image, or with magnification, using a zoom factor greater than 1.0

A

Detailed area artifacts

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10
Q

Length of fibers in phantom

A

10mm

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11
Q

Count each fiber as 1 point if __ mm or more of the fiber is visible in the correct location and orientation

A

8

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12
Q

Count a fiber as 0.5 point if the fiber appears to be equal to or greater than __ mm and less than __ mm

A

5; 8

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13
Q

Must have a fiber score of at least ___ to pass

A

2

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14
Q

There are a total of __ specks per group

A

6

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15
Q

A count of 4-6 specks is scored as:

A

1.0

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16
Q

A score of 2-3 specks is scored as:

A

0.5

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17
Q

A count of 1 speck is scored as:

A

0

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18
Q

Stop counting specks after a group is scored:

A

0.5 or 0

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19
Q

Must have speck group score of at least __ to pass

A

3

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20
Q

Masses; at least ____ of border is continuous and generally round

A

3/4

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21
Q

Count mass as ___ point if a mass-like object is visible in the correct location but does not have a generally circular appearance

A

0.5

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22
Q

Stop counting after mass is scored:

23
Q

Must have a mass score of at least __ to pass

24
Q

Ensures indicated compression thickness is within tolerance

Study These Flashcards
A

Compression thickness indicator

25
Frequency of Compression thickness indicator test
Monthly or whenever inaccurate indicator performance is suspected, and. upon installation of new equipment
26
Paddle used for compression thickness indicator QC test
Spot compression paddle
27
Flex/Non-flex for compression thickness indicator QC test
Non flex
28
____ pounds / _____ decanewtons for compression thickness indicator QC test
10 - 15; 4.4 - 6.7
29
The compression thickness indicator must be accurate to +/- ___ cm from the actual thickness
0.5
30
If recommended criteria for compression thickness indicator is not met, corrective action must be taken:
Within 30 days
31
Ensures digital system indicator, lights, displays, mechanical locks, and detents are working properly and that mechanical rigidity and stability of the equipment is optimum
Visual checklist
32
Frequency for visual checklist QC
Monthly and after service/upon installation of new equipment before clinical use
33
Critical visual checklist tests
1. Cleaning solution must be available 2. All locks must work correctly 3. Breast support must not be cracked 4. Paddles/face shields must not be cracked 5. DBT assembly must move as designed through the range of motions
34
Failures of critical visual checklist criteria must be corrected:
before clinical use
35
Less critical failures of visual checklist criteria must be corrected:
within 30 days
36
Ensures monitors are clean and free from dust, fingerprints, and other marks that may interfere with clinical information
AWS/RWS Monitor QC
37
Ensures monitors are calibrated correctly and the brightness and contrast settings are appropriate
AWS/RWS Monitor QC
38
AWS/RWS Monitor QC frequency
Monthly/after service
39
Corrective action for failures of AWS/RWS QC must be corrected:
Before clinical use
40
Frequency for repeat analysis QC
AS needed
41
For repeat rates to be meaningful, a patient volume of at least ___ is needed for repeat analysis QC
250
42
Not to be included on repeat analysis QC:
Wire/localization images, additional views to image entire breast for larger women, quality control images
43
Overall repeat rate should be less than __%, but a rate of __% is adequate
2; 5
44
Source of problem for repeat analysis QC should be corrected:
Within 30 days
45
Frequency for viewing conditions QC (radiologist)
Daily
46
In reading rooms, illuminance should be between:
20 - 45 lux
47
the amount of ambient room light shining down on the review workstation
Illuminance
48
The amount of light coming out of the monitor
Luminance
49
Frequency for compression force QC
Every 6 months (semiannually) or whenever unstable compression is suspected before clinical use
50
Force of at least ___ pounds for compression force QC test (manual)
25
51
Force of ___ pounds for compression force QC test (power driven)
25 to 45
52
Corrective action for compression force failure must be completed:
Before clinical use
53
Detects and corrects equipment problems related to the digital detector
Detector calibration
54
Frequency for detector calibration QC
Specified by manufacturer
MAMMO
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