| ultrasonic s. |
an ultrasonic instrument with a tip for supplying high-frequency vibrations, used to remove adherent deposits from the teeth and bits of inflamed tissue from the walls of the gingival crevice.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
|
|---|---|
| ultrasonic t. |
the ultrasonographic visualization of a cross-section of a predetermined plane of the body by linear scanning with an ultrasonic probe across the desired site and displaying on a B-scan.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
|
| ultrasonic w.’s |
waves similar to sound waves but of such high frequency (20,000 hertz or higher) that the human ear does not perceive them as sound; see ultrasonics.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
|
| ultrasonic transducer |
A device used in ultrasound that sends and receives the sound wave signal.
출처:
|
| ultrasonic wave |
A sound wave of greater frequency than 20 kHz. These waves do not produce sound audible to the human ear.
출처:
|