Image Modes
10-8
Gray
Rejection
The Gray Rejection feature processes and rejects gray scale levels within certain ranges.
1 Click the [Rejection] item in the B image menu or soft menu, and the
Gray Rejection
toolbox will appear
.
2
Move the cursor onto the â–² marker. The cursor becomes a
. Press <Set> key and
roll the trackball to move the â–² marker along the horizontal axis.
You will notice the B
Mode image changes at the same time showing the modifications in real-time.
3
After the adjustment is complete, press <Set> key a second time to fix the marker in the
new position.
4
Pressing the [Back] key will cancel the active adjustment, returning the node back to the
previous position.
5 Click [OK] to confirm the adjustment and exit the gray map toolbox.
6 Click [Cancel] to cancel all modification and resume the previous curve and exit the
gray map toolbox.
The adjustment is shown in the following figures:
γ Correction
z The γ correction is used to correct non-linear distortion of images.
z The γ correction selections are represented by 0, 1, 2, and 3, respectively
representing coefficients of 1, 1.1, 1.2, and 1.3.
z Adjust the γ item in the B image menu or soft menu, and the γ correction
parameters are displayed on this menu.
10.3.2 M Mode
1. Changing M image
Frequency
To select the current transducer frequency:
z Click [Freq] item in the menu to select among frequency values.
z The transducer frequency is also displayed in the image parameter area in the
upper left corner of the screen.
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