GE Voluson 730, Руководство по обслуживанию

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GE M
EDICAL
S
YSTEMS
- K
RETZTECHNIK
U
LTRASOUND
D
IRECTION
105844, R
EVISION
1 V
OLUSON
® 730 S
ERVICE
M
ANUAL
Chapter 4 Functional Checks 4-13
For further details refer to the Voluson® 730 Basic User Manual:
• Chapter 8, CFM-Mode (Color Flow Mode)
• Chapter 9, PD-Mode (Power Doppler Mode)
• Chapter 10, TD-Mode (Tissue Doppler Mode)
12
SMOOTH
To select different filter periods for rising velocity and falling velocity.
RISE Filtering of the rise velocity leads to noise suppression.
FALL This filter leads for “prolongation” of the display flow.
13
FREQU.
It serves for selection of the Transmit Frequency which also depends on the Color-Box
position.
14
ENSEMBLE
Controls the number of pulses to constitute one Color- or Power-Doppler line in the
display.
15
DYNAMIC
Dynamic range refers to the compression of grayscale information into a suitable range
for the display. It allows you to enhance an interesting part of the grayscale.
16
LINE DEN
Determines the line density within the Color-Box.
The lower the line density, the larger the line distance and the size of the color pixels.
17
SCALE (CFM, TD)
The maximum velocities are displayed above and under the color scale in kHz, cm/s or
m/s.
18
CFM-MAP (PD, TD)
Provides selectability of the color coding for an optimization of the display of blood flow
(similar to the post-processing curves with grayscale 2D scans).
After a selection has been made, the color bar displays the resultant map.
19
BALANCE
The Balance controls the amount of Color display over bright echoes and helps to confine
color within the vessel walls.
20
ARTEFACT (on/off) Switch on/off the artifact suppression.
21
BASELINE (up/down)
The baseline shift can be used to prevent aliasing in one flow direction similar to the
Doppler baseline shift. There are 8 steps in each direction. (impossible in PD-Mode)
Table 4-6 Color Doppler Mode (CFM, PD, TD) Functions
Step Task Expected Results