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21 Cards in this Set
- Front
- Back
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what are the 2 important aspects of QUALITY ASSURANCE?
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Quality Management & Quality Control
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What is Quality Management?
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Part of management function which
determines & controls quality policy |
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What is Quality Control?
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The set of operations necessary to
maintain or improve quality |
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What are the benefits of QA?
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Reduce patient exposure
Consistent image quality Increased department efficiency Increased reliability & efficiency of processor, equipment & personnels |
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Equipments required for daily QA testing film processor
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Sensitometer & Densitometer
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What soes the mammo phantom contain?
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Square acrylic block with wax insert
containing simulated masses, fibrils & calcium specks of varying specified sizes. Numerical values are assigned to each position containing an object: -The higher the phantom image score the better the imaging system. |
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the mammo phantom is equivalent to breast tissue that ____.
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Consists of 50% adipose and 50%
glandular tissues equivalent. |
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the density of film should be _______ (a range). the control limits are ____
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1.6 – 2.0; +/- 15%.
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For the specks, must at least see _____ (fraction) of each sample.
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3/4
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representations
1-6: scars 7-11: calcium 12-16: cysts |
learn!
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`bright circle mimics _______.
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nipple
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density difference should be _____.
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0.50 +/- 0.05
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Daily consistency:
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An empty test cassette
4 cm perspex block AEC chamber Exposure made at normal settings Post exposure mAs reading noted Repeat 3 times, noting mAs readings Variation +/- 15% acceptable |
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How to calculate the Overall percentage of rejected films:?
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no. of rejected films/
total number of films used X100% |
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How to calculate the percentage of rejected films from each
category: |
no. of films from rejected category/
total number of rejected films used x 100% |
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Residual fixer indicates insufficient_____.
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washing
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What the ANALYSIS OF FIXER RETENTION
(QUARTERLY) for? |
Estimate the concentration of residual
fixer in a processed film, As an indicator of archive storage quality |
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What are the 2 types of semi-annual tests done by the radiographer?
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Darkroom Fog Test & Screen-Film Contact Test
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What is the of semi-annual test done by the vendor/CRPNS?
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Compression
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How to do the semi-annual screen-film contact test?
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Test tool : Finer meshes with 40 wires per inch
Procedure: Loaded cassette placed above grid location The mesh placed directly on the cassette Expose film at 28 kVp to get 0.7 - 0.8 OD The film is viewed from about 6 feet |
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What is the annual COLLIMATION ALIGNMENT TEST for?
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To ensure that the light field seen on the film is
indeed the area that is being irradiated |
