GE Vivid 7, Руководство по обслуживанию

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GE H
EALTHCARE
D
IRECTION
FC091194, R
EVISION
11 V
IVID
7 S
ERVICE
M
ANUAL
4 - 42 Section 4-3 - Functional Checks
4-3-7-4 Check Compress, Reject, Power and Dynamic Range
Table 4-13 M-Mode Soft menu Controls check
Step Task Expected Result(s)
1. Adjust Compress
Controls the amount of contrast in the image.
An index number is displayed in the status window to
indicate the relative level of compression.
2. Adjust Reject
Adjust reject level.
When Reject is increased, low-level echoes are
rejected and appear darker in the image.
An index number in the status window indicates the
relative level of rejection.
3. Adjust Power
Controls acoustic power in all modes.
When power is set to maximum, it is equal to or less
than the maximum acoustic power permitted by the
FDA.
Both Thermal Index (TI) and Mechanical Index (MI) are
displayed on the screen.
4. Adjust Dynamic Range
Enables control of the dynamic range or contrast of the
image.
When dynamic range is set to High, the image is softer
and more low-level data is visible.