GE Logiq 500, Расширенное справочное руководство

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Quality Assurance
LOGIQ 500 Advanced Reference Manual
2276614–100 Rev. 0
5–8

System Setup
The user should tailor the tests to their particular needs. It is
certainly not necessary to make all checks with all probes. A
representative example, with the probes used most often by the
customer, should be adequate in judging system performance
trends.
Use a gray scale phantom as the scan object for the tests.
Commercial phantoms are supplied with its own operator
manual. Be familiar with proper phantom operating procedures
prior to use for quality assurance evaluations.
1. Adjust image monitor. Brightness and contrast should
be set to the normal viewing of a good gray scale
image.
2. Check all recording devices for proper duplication of
image monitor. Ensure that what is seen is what is
recorded. Check the B/W or Color page printer, VCR,
MIC, or Laser camera.
3. Annotate non-displayed image processing controls.
4. Set TGC slide pots to center (detent) position.
5. Place focal zone marker(s) in area of interest for an
optimum image.
Test Procedures
The following are recommended Quality Assurance tests. A
brief description of the test, the benefit it provides and steps to
accomplish the test are supplied.
The importance of recording scan parameters and consistent
record keeping cannot be stressed enough. Reproducibility to
monitor system trends is the key to quality assurance
evaluations.
Using the system’s dual image display format is often very
convenient and saves recording media.