7 Working with Images
98 Basic User Manual
7.1.4 Harmonic Imaging
Harmonic Imaging (THI) 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, press the THI key on the key panel to enable the THI mode, and THI
or PHI appears on the left side of the screen. Optimize the image the same way you did in
the B mode.
Press the THI key again to exit the imaging, and THI or PHI disappears from the screen
NOTE:
• The system automatically optimizes certain parameters (B-mode gain, frequency
and acoustic output power) upon enabling THI.
• Compared to the B-mode imaging, THI improves image resolution but decreases
the depth. Therefore, you should make an optimal balance when choosing an
imaging mode.
• THI is only available with compatible probes.
7.1.5 Panoramic Imaging
Panoramic imaging is an imaging process that produces a panoramic image by using
certain probes. The panoramic image provides sequentially and individually aligned
B mode images on a static image. The B mode images are real-time, showing their
anatomical context of an adjacent structure. Panoramic imaging allows you to display,
view and measure a new stitched image constantly.
NOTE:
• Panoramic imaging is only available with linear 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 backwards and forwards.
• When the scan depth increases, it is generally required to decrease the scan
speed.
Perform the following steps to apply real-time panoramic imaging.
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