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. unit of acoustic impedance
2. ultrasound gel
3. comes in direct contact with the patient as part of the transducer
4. scanning mode used to assess cardiac pathologies

1. b. rayls
2. f. acoustic coupler
3. h. matching layer
4. i. M-mode