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53 Cards in this Set
- Front
- Back
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What test tool(s) are used to evaluate Effective Focal Spot Size?
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Line pair resolution tool
star test pattern pinhole camera >0.3mm |
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What are the acceptable parameters for effective focal spot size?
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FSS<0.8mm +50%
0.8</=FSS</=1.5 +40% FSS>1.5mm +30% |
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How often should FSS be evaluated?
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on installation of a new x-ray tube and annually thereafter
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What test tool(s) are used to evaluate Half Value Layer?
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Al Filtration
Digital Dosimeter |
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What are the acceptable parameters for Half Value Layer?
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@80 KVp
2.3</= HVL</=3.5 |
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How often should HVL be evaluated?
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Semi Annually
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What test tool(s) are used to evaluate Collimation?
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Collimator test tool (10X12 cassette modified with radiopaque markers)
Beam alignment test tool |
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What are the acceptable parameters for collimation?
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Light/rad field alignment:
2% FFD Centering: 1% FFD |
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How often should collimation be evaluated?
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semi annually
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What test tool(s) are used to evaluate the Collimator indicator?
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Ruler, cassette or fluorescent screen
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What are the acceptable parameters for the collimator indicator?
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+/= 2% of collimator indicator
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How often should the collimator indicator be evaluated?
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semi annually
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What test tool(s) are used to evaluate distance?
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tape measure
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What are the acceptable parameters for the collimator indicator?
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+/= 10% FFD
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How often should distance be evaluated?
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semi annually
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What test tool(s) are used to evaluate the centering indicator?
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centering tool
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What are the acceptable parameters for the centering indicator?
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+/= 2% FFD
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How often should the centering indicator be evaluated?
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semi annually
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What test tool(s) are used to evaluate angulation?
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protractor
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What are the acceptable parameters for angulation?
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+/= 1% FFD
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How often should the angulation be evaluated?
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semi annually
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What test tool(s) are used to evaluate KVp?
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Wisconsin (KVp) test cassette
mammo-KVp meter |
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What are the acceptable parameters for KVp?
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+/= 5 KVp
Mammo - +/= 1 KVp |
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How often should KVp be evaluated?
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semi annually
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What test tool(s) are used to evaluate the timer?
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Synchronous spinning top
computerized dosimeter |
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What are the acceptable parameters for the timer?
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+/= 5% > 10 ms
[+/=20% < 10 ms, Bushong] |
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How often should the timer be evaluated?
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at least annually
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What test tool(s) are used to evaluate the mA linearity [mR/mAs]?
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computerized dosimeter
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What are the acceptable parameters for mA linearity?
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+/= 10% of adjacent mA stations
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How often should mA linearity be evaluated?
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at least annually
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What test tool(s) are used to evaluate exposure reproducibility?
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computerized dosimeter
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What are the acceptable parameters for exposure reproducibility?
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+/= 5%
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How often should exposure reproducibility be evaluated?
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at least annually
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What test tool(s) are used to evaluate exposure reproducibility for exposure control?
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step wedge and dosimeter
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What are the acceptable parameters for exposure control reproducibility?
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+/= 0.1 OD
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How often should exposure control reproducibility be evaluated?
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semi annually
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What test tool(s) are used to evaluate exposure control ion chamber sensitivity?
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Step wedge and dosimeter
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What are the acceptable parameters for exposure control ion chamber sensitivity?
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+/= 10%
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How often should exposure control ion chamber sensitivity be evaluated?
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semi annually
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What test tool(s) are used to evaluate exposure control density control?
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computerized dosimeter
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What are the acceptable parameters for exposure control density control?
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verification to manufacturer
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How often should exposure control ion chamber sensitivity be evaluated?
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semi annually
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What test tool(s) are used to evaluate exposure control min response time?
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Lucite phantom and computerized dosimeter
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What are the acceptable parameters for exposure control min response time?
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+/= 10% of one another
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How often should exposure control min response time be evaluated?
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semi annually
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What test tool(s) are used to evaluate exposure control back up timer
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computerized dosimeter
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What are the acceptable parameters for exposure control min response time?
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</=600 mAs or 6s (>50KVp)
</=2000 mAs (<50KVp) |
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What are the parameters for exposure rate on fluoroscopic unit?
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should be <5 rad/min, but must <10 rad/min (with ABS)
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What are the minimum Source-to-skin distances for mobile and fixed fluoroscopic units?
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>/= 15" fixed
>/= 12" mobile |
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What test tool(s) are used to evaluate fluoroscopic resolution for unit and monitor?
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fluoro wire mesh test tool
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What test tool(s) are used to evaluate fluoroscopic contrast?
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low resolution test tool
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If the HVL increases, what is it an indication of?
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The deposition of vaporized tungsten on the inner surface of the glass envelope, or an increase in KV
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If HVL decreases, what is it an indication of?
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A decrease in the actual KV
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