GE Logiq 500, Руководство пользователя

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Doppler
LOGIQ 500 Basic Users Manual
2233658–100 Rev. 0
5–56

PW Doppler Mode Sub-Menu Page 1
30
Preset PWD
S.V.
Length
Wall
Filter
Slant
Scan Dynamic
Range
Set Up ECG
0 20.0 5
Figure 5–21. PW Doppler Mode Sub-Menu Page 1
Dynamic Range Slant Scan
Description Controls how echo intensities are
converted to shades of gray, thereby
creating a range of gray scale that can be
adjusted. (Also found in the CWD soft
menu.) Slant Scan in Doppler imaging is used to
control the position of the Doppler cursor
for LINEAR PROBES ONLY. (Also found
in the CWD soft menu.)
When Slant Scan is selected while in a
B-Mode display, the B-Mode is not
effected. Only the Doppler cursor will
show at a slant.
The Doppler angle remains constant in
relation to the anatomy when slant scan
direction is changed.
Benefits Useful for optimizing tissue texture to
differentiate between echo levels that are
close together. Dynamic range should be
adjusted so that the highest amplitude
edges appear as white while lowest levels
(such as blood) are just visible. Provides a Doppler cursor suitable for
linear probe operation.
Values The settings cycle in 6 dB steps from
18 dB to 48 dB. Set the default value for
PWD dynamic range in the Set Up/Custom
Display menu page 4.
Dynamic range levels are returned to the
preset value when changing the following:
S
Application
S
Exam category
S
New patient.
Pre-processing function.
+ (Left), 0 (Center) and – (Right). See
Figure 5–22 and Figure 5–23.
Pre-processing function.
Affects on
Other Controls Operates only in real-time, not in freeze,
Cine, Timeline replay, or VCR playback.