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ch 30 physics
digital display QC
Question | Answer |
---|---|
Who are the SMPTE? | the society of motion picture and television engineers |
The pattern used to make measurements of the resolution of display systems is the _________. | SMPTE |
What 2 committees set the standard for DICOM? | ACR, and NEMA |
How are medical images transferred? | thru the DICOM standard |
This allows the transfer of medical images from one DICOM display to another DICOM display to remain consistent in grayscale? | perceptual linearization |
In 1998, _______ released the first set of standards for flat panel displays. | VESA |
____________ is a procedure manual for testing all digital display devices. | AAPM TG 18 |
This is used to evaluate monitor display reflection ands to assess ambient light conditions? | illuminance meter |
How many types of luminance meters are there? | 2 |
What type of luminance meter is used to test from a distance of 1meter? | telescopic |
What test pattern is used the most for QC testing of the digital display devices? | AAPM TG 18 |
The luminance meter requires the use of properly calibrated _________. | photometers |
What 2 photometers can test for luminance response? | telescopic, near-range |
What does TG in AAPM TG 18 stand for? | task group |
Geometric distortion can be tested by which test pattern? | TG 18 LPV/LPH or TG 18 QC |
How should the test pattern appear in the question above? | have the appearance of straight lines in the pattern |
What are the 2 types of reflection? | specular, diffuse |
This type of reflection occurs when light is ramdomly scattered onto the monitor. | diffuse |
This type of reflection results in the generation on mirror images of light sources surrounding the monitor. | specular |
Monochrome monitors reduce the amount of _______ reflection because of an improved _______________ coating. | specular, anti-reflective |
Diffuse reflection can be tested by this type of pattern. | TG 18-AD |
For the pattern above, what factor can you change when testing the diffuse reflection level? | turn on or off the ambient light |
What really is ambient light???? | Basically its light that is already present, whether it be natural or artificial |
What test is done to perform a qualitative evaulation of the luminance response of a digital diaplay device? | TG 18 CT |
What angle is best for viewing a digital display monitor? | straight on! |
What test pattern is used to measure display resolution? | TG 18-CX |
What test pattern is used to measure the level of noise? | TG 18-AFC |
What test pattern should shoiuld be viewed daily? | TG 18-QC |
Who is in charge of daily Quality Control issues? | A QC tech should be assigned to do the daily testing |
When developing a QC program, what factors must be included? | acceptance test of any new digital device, routine QC by tech, periodic reviews of QC program by medical physicist, annual and post repair performance evaluations |
All this was off your power point in BOLD letters! | Review the Power Point! |