Match the following choices with the correct statement as each relates to medical sonography.
a. B-mode
b. rayls
c. damping material
d. decibels
e. Doppler
f. acoustic coupler
g. PZT
h. matching layer
i. M-mode
j. Huygen's principle
1. piezoelectric crystal material
2. accounts for a near and far zone of beam
3. frequency of sound is related to direction of echo relative to source
4. the process by which images are displayed on current machines.
1. g. PZT
2. j. Huygen's principle
3. e. Doppler
4. a. B-mode
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