Shenzhen Mindray Bio-Medical Electronics Co., Ltd. DC-N2, Руководство оператора

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Image Optimization 5-17
Power Map
Description This feature indicates the display effect of Power image.
The maps in the Power mode image are grouped into two categories: Power
maps and Directional Power maps.
Operations
To select among the maps, turn the knob under [Map] on the image menu.
There are 8 kinds of maps provided: P0-3 belong to Power mode maps, while
Dp0-3 belong to Directional Power mode maps.
The Power maps provide information of blood flow, which are highly sensitive
to the low-velocity flows.
The Directional Power maps provide information of flow direction.
Dynamic Range
Description This function is to adjust the transformation of echo intensity into color signal.
Operations Click the [Dynamic Range] item on the image menu to adjust the dynamic
range.
The adjusting range is 10-70dB in increments of 5dB.
Effects
Increasing dynamic range will lead to higher sensitivity to low-power signals,
thus enhances the range of signals to display.
5.8 PW Doppler Mode
PW (Pulsed Wave Doppler) mode is used to provide blood flow velocity and direction utilizing
a real-time spectral display. The horizontal axis represents time, while the vertical axis
represents Doppler frequency shift.
PW mode provides a function to examine flow at one specific site for its velocity, direction and
features. Thus, a combination of both modes will contribute to a much more accurate analysis.
NOTE: PW imaging is an option.
5.8.1 Basic Procedures for PW Mode Exam
1. Select a high-quality image during B mode or B + Color (Power) mode scanning, and
adjust to place the area of interest in the center of the image.
2. Press <PW> to adjust the sampling line,
z
The sampling status will be displayed in the image parameter area in the upper right
corner of the screen as follows:
PW Sampling Line
Adjustment SV
Angle
SVD
3. Set the position of the sample line by moving the trackball left and right, and set the SVD
by moving the trackball up and down, adjust the angle and SV size according to the
actual situation.