SAEVO EVUS 8, Руководство пользователя

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6 Acquiring Images
Basic User Manual 57
■ Depth
Depth is used to adjust the distance over which the B-Mode image is anatomized.
To adjust the depth:
●
Flip the DEPTH switch upwards to decrease the depth range of the 2D image and the size of image is
magnified.
● Flip the
DEPTH
switch downwards to increase the depth range of the 2D image and the ultrasound image is
reduced.
NOTE:
• The frame rate varies with the depth.
• The range of the scanning depth varies with the probe. D (depth) is displayed in the 2D Image Info area.
■ Frequency
The probe is capable of generating a broadband signal with a certain start frequency and a certain bandwidth. A
higher frequency brings about higher resolution and lower penetration.
To adjust the frequency:
1. Select
Frequency by pressing the corresponding function key.
2. Rotate it clockwise or anticlockwise to adjust the value.
■ Chroma
Chroma is used to colorize the gray scale image to enhance the discrimination capability.
To adjust the chroma:
1. Select the
Menu key in the real time scan. A menu pops up on the screen.
2. Select Chroma by using the trackball or the ↑ or ↓ key.
3. Rotate the Menu key or select the ← or → key to choose a color scheme.
■ Compound Imaging
Compound imaging is used to acquire a series of overlapping image frames from substantially differing spatial
directions and combining these images to reduce speckle and improve contrast resolution.
To use compound imaging:
1. Select the
Menu key in the real time scan. A menu pops up on the screen.
2. Select Compound by using the trackball or the ↑ or ↓ key.
3. Rotate the
Menu
key or select the ← or → key to enable or disable the feature.
■ Line Density
Line density refers to the amount of ultrasound beam that makes up the image. Increasing the value of line density
improves the resolution and decreases frame rate. Therefore, you have to balance the frame rate and the image
quality when adjusting the line density.
A higher line density is useful in obtaining a very high resolution, such as the thyroid or testicles. A lower line
density is useful when scanning fetal heart beat, adult cardiac applications and in clinical Radiology applications.
To adjust the line density:
1. Select
Line Density
by pressing the corresponding function key.
2. Rotate it to make the setting.