Sonoscape SSI-6000

SSI-6000/SSI-5800/SSI-5500/SSI-5500BW
Digital Color Doppler Ultrasound System
Chapter 10
Spectral Doppler Mode
Pulsed Wave Doppler (PW) and Continuous Wave Doppler (CW) are collectively
called Spectral Doppler mode
1
.
PW Doppler lets you examine blood flow data selectively from a small region called
the sample volume. The sample volume is covered by the sample volume gate
which is located on the Spectral Doppler cursor. A short line across the sample
volume is called the flow direction cursor. Refer to Figure 10.1 for an illustration of
PW-duplex mode.
CW Doppler examines the flow data all along the Doppler cursor rather than a
small region.
Contents
10.1 Activation of Spectral Doppler Mode . . . . . . . . . . . . . . . . 10-2
10.1.1 B/CDI/DPI/TDI Operation in Spectral Doppler Mode . . . 10-3
10.1.2 2D Refresh . . . . . . . . . . . . . . . . . . . . . . . . 10-4
10.1.3 Display Format . . . . . . . . . . . . . . . . . . . . . . . 10-5
10.2 PW Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . 10-5
10.2.1 Sample Volume Gate Adjustment . . . . . . . . . . . . . 10-5
10.2.2 Activation of PW Spectral Display . . . . . . . . . . . . . 10-5
10.2.3 Pulse Repetition Frequency (PRF) . . . . . . . . . . . . 10-5
10.2.4 Wall Filter (WF) . . . . . . . . . . . . . . . . . . . . . . 10-6
10.2.5 Spectral Doppler Gain . . . . . . . . . . . . . . . . . . . 10-6
10.2.6 Steer Angle . . . . . . . . . . . . . . . . . . . . . . . . 10-6
10.2.7 Flow Invert . . . . . . . . . . . . . . . . . . . . . . . . . 10-6
10.2.8 Spectral Doppler Frequency . . . . . . . . . . . . . . . . 10-7
10.2.9 Sweep Speed . . . . . . . . . . . . . . . . . . . . . . . 10-7
10.2.10 Baseline . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7
10.2.11 PW Power . . . . . . . . . . . . . . . . . . . . . . . . . 10-7
10.2.12 Angle Correction . . . . . . . . . . . . . . . . . . . . . . 10-8
10.2.13 Dynamic Range (DYN) . . . . . . . . . . . . . . . . . . 10-8
10.2.14 Chroma . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8
1
The availability of the PW/CW-duplex and -triplex modes depends on both the probe models and
the application modes.
P/N: 4701-0061-01B
10-1