General Imaging Adjustments Print
Modified on: Wed, 12 May, 2021 at 3:09 AM
Disclaimer: The information herein is not intended to replace the product’s User Manual. Please consult the User Manual for comprehensive information and cautionary guidance about the product’s operation and use.
Black And White Imaging Adjustments
The following adjustments can be done to further improve the image quality:
Black and white gain increases or decreases the amount of echo information displayed in an image. It may have the effect of brightening or darkening the image if sufficient echo information is generated.
- Press the Gain icon.
The gain slider disappears after a few seconds. Press Gain again to activate the slider.
- Use the gain slider to increase or decrease gain.
- Press the Gain icon again to hide the control.
- Depth adjusts the field of view. It increases the field of view to look at larger or deeper structures; it decreases the field of view to look at structures near the skin line.
- Press the Depth icon.
- Use the depth slider to increase or decrease depth.
The depth slider disappears after a few seconds. Press the Depth icon again to activate the control.
- Press the Depth icon again to hide the depth control, if needed.
Color Imaging Scanning Adjustments
If the blood flow velocity exceeds the maximum velocity range the system can cover, based on the sampling rate used, aliasing occurs.
Aliasing appears as a shift in color from the color representing positive velocity to color representing negative velocity or visa versa.
The maximum velocity is displayed on top of the color bar.
Slant the ROI (Region of Interest) of the Color Flow linear image left or right to get more information without moving the probe.
Press and hold the color region of interest. The region of interest changes to yellow, indicating it is ready to be steered in a different direction. Drag the region of interest to the left or right depending on the desired angle.
NOTE: Angle Steer applies only to the linear functionality of the Dual Probe.
If Vscan Extend is idle for a period of time, the device enters freeze mode to minimize risk of overheating and battery drainage. Press the display to unfreeze the image and continue scanning. See ‘Scan Settings’ for more information.
Vscan Extend does not include an ECG interface as often found on larger ultrasound systems intended for cardiovascular applications. The AutoCycle feature detects a complete cardiac cycle by analyzing the cyclicity of the ultrasound intensity data. The resulting time-stamps are used for storing and playing cineloops smoothly. The AutoCycle feature should typically detect heart rates in the range 46–100 beats per minute. If the detected heart cycle is outside this range, or if the cyclicity quality is too poor, a default loop will be saved based on image data and configuration. The detected start and stop times for the AutoCycle are not necessarily in phase with the QRS complex. Since adequate cyclicity can only be expected in cardiac applications, all other applications will use the default config settings.
Use of sterile sheath
It is recommended to use a sterile sheath around the probe and main unit if Vscan Extend is used as an aid to needle guidance or in any clinical situation where contamination could be a concern.
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