SAEVO EVUS 8, Руководство пользователя

Страница: 105 / 150

10 Working with Images
Basic User Manual 95
10�1�4 Harmonic Imaging
Harmonic Imaging uses the harmonic frequencies generated by tissue. The fundamental transmit frequency results
in a harmonic frequency echo. The harmonic frequency received from the tissue is a multiple of the fundamental
transmit frequency. The fundamental and any accompanying artifacts are missing from the harmonic frequency that
the system receives. The artifact reduction, and the concomitant reduction in haze and clutter, increases contrast
resolution and improves border delineation. THI is useful in difficult-to-image patients. Harmonic Imaging contains
THI and PHI.
In real time B mode, select the
THI key on the key panel to enable the THI mode, and THI or PHI appears at the
lower left corner of the screen. Optimize the image the same way you did in the B mode.
Select the
THI key again to exit the imaging, and THI disappears from the screen.
NOTE:
• The system automatically optimizes certain parameters (B-mode gain, frequency and frame rate) upon
enabling THI.
• Compared to the B-mode imaging, THI improves image resolution but decreases the frame rate. Therefore,
you should make an optimal balance when choosing an imaging mode.
• THI is only available with compatible probes.
10�1�5 Panoramic Imaging
Panoramic imaging broadens the scope of spatial relationships, thereby sequentially aligning individual images
in their anatomical context. Panoramic imaging has the ability to display an entire abnormality and show its
relationship to adjacent structures on a single, static image.
NOTE:
• Panoramic imaging is only available with linear and convex probes.
• Apply an adequate amount of coupling gel along the intended path of the scan.
• Do not shake, rotate or tilt the probe during the scan.
• Ensure the probe remains to be in contact with the skin perpendicularly during the scan.
• Do not change the scan direction or move the probe backward or forwards.
• When the scan depth increases, it is generally required to decrease the scan speed.
■ Real time Panoramic Imaging Mode
Perform the following steps to apply panoramic imaging.
1. Optimize the B-mode image.
2. Select the
Pan key on the control panel to enter the inactivated Panoramic Imaging mode.
You can select the Freeze key on the control panel to exit and return to the B mode.
3. Select the Update key on the control panel to enter the real-time panoramic imaging.
Select Exit by rotating the corresponding function key to exit the real-time panoramic imaging.
4. Perform the scan.
A real-time stitched image is generated, on which probe speed box and hint are displayed. A blue speed box
indicates a slower scanning speed, a green speed box indicates a normal scanning speed and a red speed box
indicates a faster scanning speed.
5. Select the Freeze key to display the panorama.