GE HEALTHCARE - KRETZTECHNIK VOLUSON® 730EXPERT (BT03)
D
IRECTION 105899, REVISION 3 DRAFT (APRIL 29, 2008) SERVICE MANUAL
Chapter 4 - Functional Checks 4-9
For further details refer to the Voluson® 730Expert Basic User Manual, Chapter 5, 2D Mode.
9
LINEAR
/ TRAPEZ
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.
10
Image Orientation
Use the LEFT/RIGHT respectively the UP/DOWN keys on the Touch Panel
to alternate the image orientation.
11
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.
12
ß-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.
13
ZOOM
Image magnification (Pan Zoom) in read-/ and write mode.
14
FOC. ZONES
Increases the number of transmit focal zone, so that you can tighten up the
beam for a specific area.
15
OTI
(Otimized Tissue Imaging) OTI™ allows to “fine tune” the system for scanning different kinds of tissue.
16
FREQUENCY
To adjust the range of the receive frequency.
high resolution / lower penetration, mid resolution / mid penetration, or
lower resolution / high penetration
17
GRAY CHROMA MAP
A gray map determines the displayed Brightness of an echo in relationship
to its amplitude.
18
PERSIST.
Persistence is a temporal filter that averages frames together. This has the
effect of presenting a smoother, softer image.
This function is only available if CRI
is switched off.
19
CRI FILTER
If this filter is set to “high”, the CRI-image is smoothed.
CRI Filter setting “off” leads to a sharper impression of the CRI-image.
This function is only available if CRI
is switched on.
20
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.
21
DYN.CONTR.
Dynamic Range controls how echo intensities are converted to shades of
gray, thereby increasing the adjustable range of contrast.
22
ENHANCE
Edge Enhance brings out subtle tissue differences and boundaries by
enhancing the gray scale differences corresponding to the edges of
structures. Adjustments to M Mode's edge enhancement affects the M Mode
only.
23
REJECT
Selects a level below which echoes will not be amplified (an echo must have
a certain minimum amplitude before it will be processed).
24
QUALITY
Control to improve the resolution by reducing the frame rate.
Respectively reducing the resolution by increasing the image frame rate.
Table 4-3 2D Mode Functions
Step Task Expected Results
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