GE MEDICAL SYSTEMS - KRETZTECHNIK DRAFT VOLUSON® 730PRO / 730PROV (BT´04)
D
IRECTION KTI105947, REVISION 2 SERVICE MANUAL
Chapter 4 - Functional Checks 4-9
8
SRI
* (Speckle Reduction Imaging)
Speckle Reduction Imaging is a smoothing type filter to reduce speckle in the
ultrasound image.
9
2D+2D/SRI
*
Changes the Single image display to two simultaneous half images. The left
frame shows only the 2D Mode image. The right frame shows the 2D Mode
image with SRI
information.
10
2D+2D/CRI/SRI *
Changes the Single image display to two simultaneous half images. The left
frame shows only the 2D Mode image. The right frame shows the 2D Mode
image with XBEAM CRI
and SRI information.
11
FFC (Focus and Frequency Composite)
FFC combines a low frequency to increase the penetration and higher
frequency to keep a high resolution.
It reduces speckle and artifacts in the 2D image.
12
CE (Coded Excitation)
Coded Excitation improves image resolution and penetration in the far field.
This allows to use a higher frequency on technically difficult patients.
13
LINEAR
/ TRAPEZOID
Advantage of the Trapezoid Mode: The scan area is very increased in
relation to the linear display by steering the ultrasound lines in the border of
the probe.
14
High Resolution Zoom
Press this key in write mode. The displayed zoom box can be placed over
the entire 2D image area, also the size and position of the zoom box can be
changed. Press the
HR-ZOOM key again to activate the zoom and again to
exit the High Resolution Zoom function.
15
Harmonic Imaging
Press the
HI key on the control panel to switch on/off the Coded Harmonic
Imaging function in 2D Mode provided the active probe allows this function.
16
FREQUENCY resp.
HARM.FREQU. in case of Harm. Imaging
To adjust the range of the receive frequency.
high resolution / lower penetration, mid resolution / mid penetration, or
lower resolution / high penetration
17
OTI (Otimized Tissue Imaging) OTI™ allows to “fine tune” the system for scanning different kinds of tissue.
18
FOC #
Increases the number of transmit focal zone, so that you can tighten up the
beam for a specific area.
19
FOC DEPTH
To select the depth position of the actual focus zone(s). Arrows at the left
edge of the 2D image mark the active focal zone(s) by their depth position.
20
ANGLE
Use this control to select a part of interest of the 2D image. The advantage
of the decreased field-of-view is an increased 2D frame rate due to the
smaller sector width.
21
BETA VIEW
This function allows the adjustment of the Volume O-Axis position of 3D
probes in 2D Mode. The green line in the displayed symbol indicates the
position of the acoustic block.
22
ZOOM Image magnification (Pan Zoom) in read-/ and write mode.
23
QUALITY
Control to improve the resolution by reducing the frame rate.
Respectively reducing the resolution by increasing the image frame rate.
24
LINE FILTER
The signals of the neighboring pulses are less weighted for the display of the
actual pulse which considerably improves the detail lateral resolution and
signal-to-noise ratio.
This function is only available if CRI
is switched off.
Table 4-3 2D Mode Functions
Step Task Expected Results
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