GE H48681XB, Service Manual

Page: 136 / 366

Step Task Expected Results
9 HR Zoom & Image Magnification
HR Zoom: Image magnification of selected image area.
push/dial Toggle control
Image Magnification: Image magnification of complete image in read and write mode.
10
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.
11
XBeam CRI (CrossBeam
Compound Resolution Imaging)
Pulses are transmitted not only perpendicularly to the acoustic window, but also in
oblique directions. The advantages of XBeam CRI are enhanced contrast resolution
with better tissue differentiation and clear organ borders.
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
SRI (Speckle Reduction Imaging)
Speckle Reduction Imaging is a smoothing type filter to reduce speckle in the
ultrasound image.
14
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.
15
2D+2D/SRI CRI
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
and
XBeam CRI information.
16
Wide Sector
Extends the field of view of curved array probes by means of beam steering.
17 Trapez Advantage of the Trapezoid Mode (button is highlighted): The scan area is very
increased in relation to the linear display by steering the ultrasound lines in the border
of the probe.
18 Image Orientation Use the
left/right respectively the up/down keys on the Touch panel to alternate the
image orientation.
19 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.
20 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.
21 Dyn.Contr. Dynamic Range controls how echo intensities are converted to shades of gray, thereby
increasing the adjustable range of contrast.
22 Foc.Zones Increases the number of transmit focal zone, so that you can tighten up the beam for a
specific area.
23 Frequency resp. Harm.Frequ. To adjust the range of the receive frequency.
high resolution / lower penetration, mid resolution / mid penetration, or lower resolution /
high penetration
24 OTI (Optimized Tissue Imaging) OTI allows to “fine tune” the system for scanning different kinds of tissue.
25
Gray Map
A gray map determines the displayed Brightness of an echo in relationship to its
amplitude.
26
Tint Map
A Tint map determines the Chroma value (color tone and saturation) of an echo in
relationship to its amplitude.
27 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
XBeam CRI is switched off.
28
CRI Filter
If this filter is set to “high”, the XBeam CRI-image is smoothed. CRI Filter setting “off”
leads to a sharper impression of the XBeam CRI-image.
This function is only available if
XBeam CRI is switched off.
Functional Checks
4-10
Voluson E-Series Service Manual
KTD106657 Revision 2