B-Mode – 2D Imaging 129
Using TEH
TEH can be used only with transducers that support harmonic imaging.
Each Diagnostic Setup that permits TEH has default settings for overall gain, TGC
gain, contour level, and contrast level for tissue harmonic imaging.
Restrictions
•
TEH is available for B-mode imaging only. If more than one scanning mode is
active, TEH will be disabled.
•
TEH is available only for certain transducers.
NOTE:
When TEH is turned on, the displayed frequency at the top of the screen
is the receiving frequency. This is double the transmitted frequency.
Advantages
•
Better images with difficult-to-scan patients
•
Increased contrast resolution
•
Reduced effect of grating lobes
Limitations
•
Best in mid-range depth – the specific depth range for which harmonic imaging
works best depends on the transducer as well as other factors.
•
Reduced penetration
•
Reduced lateral resolution
To turn harmonic imaging on:
Make sure that B-mode imaging is turned on.
•
Press
[
q
]
or
Click Harmonic under General on the left side of the screen and select TEH.
To turn harmonic imaging off:
•
Press
[
q
]
or
•
Click Harmonic under General on the left side of the screen.
NOTE:
When you turn harmonic imaging off, B-mode scanning resumes with
the frequency, gain, dynamic range and so on that you were using previously.
Timer
You can start a timer to keep track of elapsed time. The time will be displayed on a
saved or printed image.
Summary of Contents for Pro Focus 2202
Page 1: ...English BB1279 A June 2005 Pro Focus 2202 Extended User Guide ...
Page 14: ...14 ...
Page 15: ...Part 1 Basics ...
Page 16: ......
Page 32: ...32 Chapter 1 ...
Page 48: ...48 Chapter 2 ...
Page 49: ...Part 2 Working with the Image ...
Page 50: ......
Page 98: ...98 Chapter 5 ...
Page 117: ...Part 3 Imaging Modes ...
Page 118: ......
Page 136: ...136 Chapter 8 ...
Page 152: ...152 Chapter 10 ...
Page 164: ...164 Chapter 12 ...
Page 165: ...Part 4 Setting up and Maintaining Your System ...
Page 166: ......
Page 200: ...200 Chapter 13 ...
Page 208: ...208 Chapter 14 ...
Page 209: ...Part 5 Pro Packages ...
Page 210: ......
Page 288: ...288 Chapter 19 ...
Page 313: ...Part 6 Appendixes ...
Page 314: ......
Page 344: ...344 Appendix C ...