Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
7 Cards in this Set
- Front
- Back
|
If the primary note is 1 Mhz, what is the
2nd harmonic? 3rd harmonic? 4th harmonic? |
2 Mhz
3 Mhz 4 Mhz |
|
|
What is the normal Doppler shift in medical imaging?
|
20 Hz - 20,000 Hz
|
|
|
An object moving toward the transducer produces a ____ Doppler shift.
An object moving away from the transducer produces a _____ Doppler shift. |
positive
negative |
|
|
Doppler shifts are normally expressed in units of ___.
|
Khz
|
|
|
The optimal Doppler angle of measurement which our equipment is set for is ____ degrees.
|
60
|
|
|
Fast Fourier transform is a technique which converts the Doppler shift into a display, known as the Doppler ____.
|
spectrum
|
|
|
Each Doppler spectrum can determine ____, ___, ___, and ____.
|
1. direction of flow (postive or negative waveform)
2. velocity of flow (height of waveform) 3. duration of flow (width of waveform) 4. # of RBCs or reflectors (brightness of waveform) |
