18 Questions
What is the primary function of the beam former in ultrasound technology?
Applying electronic delays to align the phases of returning echoes
What is the purpose of the pulser in an ultrasound machine?
To generate the electric voltage to produce the acoustic signal
What is the result of the beam former's alignment of phases from individual transducer elements?
An output signal representing the acoustic information from a pulsed ultrasound beam
What is the role of the transducer elements in the beam forming process?
To receive the echoes returning from the acoustic signal
What is the purpose of the electronic delays applied by the beam former?
To align the phases of the echoes returning from individual transducer elements
What is the relationship between the transducer elements and the output signal in beam forming?
The output signal is created by summing the realigned signals from all the transducer elements
What is the purpose of the pulse generator in an ultrasound machine?
To generate electrical pulses for the transducer
What is the function of the piezoelectric material in an ultrasound transducer?
To convert electrical pulses into acoustic energy
What determines the brightness of a cell in the ultrasound image?
The strength of the echo
What type of transducer has piezoelectric crystals set in a line across the transducer face?
Linear Array
What is the purpose of the transducer in an ultrasound machine?
To convert electrical pulses into acoustic energy
What is an example of a synthetic piezoelectric material?
Polyvinylidene difluoride (PVDF)
What is the primary function of the microphone in a hearing aid?
To convert sound waves into electrical signals
What is the approximate upper audible limit of human hearing in healthy, young adults?
20 kHz
What is the main application of ultrasound devices in medicine?
Ultrasound imaging or sonography
What is the primary use of ultrasound in industrial settings?
To detect invisible flaws in products
What is the Doppler effect a change in?
Frequency or wavelength of a wave
What is the frequency range of ultrasound devices?
From 20 kHz to several gigahertz
This quiz covers the principles of beam formation in ultrasound technology, including dynamic receive and the role of beam formers and pulsers in generating electric voltage.
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