User's Manual Part 2
Table Of Contents
71
Scan modes overview
B mode overview
B mode image controls
Use the following 2D image controls during live scanning.
B Color PW
M Power
B Gain 58
Depth 15.0
Focus 8.0
DYN Range 60
12
Focal Zone 1 QScan 1
Focal Span 1 Persist 4
Steering 0 Reject 4
Freq
M
Trap
Density
H
THI
L/R U/D
QRange
0
QBeam
1
Dual Toggle Full Scr
Chroma Map 0 Sector Width 256
GSC 0 Sector Pos
Acoustic 1540 TX Power 80.0
Zoom
Image
Reverse
Needle
Erase
BDMK
Annot Label Arrow
Annot Del
BDMK
Probe Pos
Rotate Close
Figure 28 B mode image controls
Gain: adjust amplification of the returning echoes, which adjust the
amount of echo information displayed in an image.
Scan depth: adjust the field of view.
Focus depth: increase the resolution for a specific area.
Dynamic range: control the range of acoustic levels displayed in the
image, which affect the contrast of the image.
Focal zones: select the focal number which also affect the acoustic
power indices.
Focal span: adjust the distance between the focal zones.
QScan: allow scanning from different angles, which helps reinforce
the real structures of an ultrasound image by eliminating artifacts,
such as speckle, noise or refractive shadows.
Persistence: adjust the amount of averaging (real-time) images.
Reject: adjust the display priority of the 2D grayscale pixels.
Frequency: change the scan frequency. As frequency increases, the
resolution becomes higher while the penetration becomes lower.
Trapezoidal imaging: increase the range of view of the ultrasound
image.
Chroma map: adjust the chroma (color tone and saturation) value
with different brightness.
Gray scale curve (GSC): change how the amplitude is converted to
brightness.
Acoustic: set the minimum acoustic output power value while still
sufficient for diagnostically acceptable information.
QBeam: permit electronic steering of the ultrasound beam to acquire
scans of an ROI from several directions.