Lecture 7 Flashcards
1
Q
What can be used to fix attenuation
A
TGC
2
Q
What does tgc stand for
A
TIME GAIN COMPENSATION
Or DGC - depth gain compensation
3
Q
Tgc slope provides
A
Amplification of specific feild echoes
4
Q
TGC promotes
A
Uniformity in the tissue
5
Q
Soft tissue attenuatese at ________ but also ____________
A
0.5dB/cm Mhz
But also attenuates coming back
6
Q
To compensate for both directions TGC must give back
A
1 dB/cm x MHz in soft tissue
7
Q
Overall gain
A
Amplification of entire feild of view and of all incoming echo voltages
8
Q
Half value layer is
A
The thickness of material that will halve the original intensity
9
Q
HVL is the distance it takes to drop ________
A
3 dB
