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 - 38 Section 4-3 - Functional Checks
4-3-6-8 Check DDP, Diff, Power and Dynamic Range
Table 4-11 2D Mode: Check DDP, Diff, Power and Dynamic Range
Step Task Expected Result(s)
1.
Use the vertical arrows to select DDP (Data
Dependent Processing).
Use the horizontal arrows to adjust DDP.
Performs temporal processing which reduces random
noise without affecting the motion of significant tissue
structures.
An index number is displayed in the status window
(under Proc) to indicate the relative DDP level.
2.
Use the vertical arrows to select Diff.
Use the horizontal arrows to turn Diff On/Off.
Affects the level of reverberations in the image.
When turned ON, the frame rate (or the number of
focal zones) will decrease, while the reverberations
will be attenuated.
3.
Use the vertical arrows to select Power.
Use the horizontal arrows to adjust Power.
Controls the amount of acoustic power applied in all
modes.
When power is set to maximum, it is equal to or less
than the maximum acoustic power permitted by the
FDA.
The Thermal Index (TI) and the Mechanical Index (MI)
are displayed on the screen.
4.
Use the vertical arrows to select Dynamic Range.
Use the horizontal arrows to adjust Dynamic Range.
Enables control of the dynamic range or contrast of
the image.
When Dynamic Range is set high, the image is softer
and more low-level data is visible.