30 Questions
What does the transmit/receive switch direct during transmission?
Driving voltages from the pulser and pulse delays to the transducer
What is the purpose of amplifiers in ultrasound technology?
To increase voltage amplitudes to suitable levels
What is called gain in the context of amplifiers?
The increase in voltage amplitudes
What is the purpose of time gain compensation (TGC)?
To equalize differences in received echo amplitudes
Why do echoes from identical reflectors at different depths have different amplitudes?
Because of differences in travel distances and attenuation
What does an analog-to-digital converter (ADC) do?
Converts voltage from analog to digital form
What does the term 'analog' mean?
Proportional
What happens to the echo signal as it travels farther from the transducer?
It becomes weaker due to attenuation
What is the purpose of the pulser in ultrasound technology?
To generate voltage pulses for transmission
What is the function of the transducer in ultrasound technology?
To transmit and receive voltage pulses
What is the primary function of the transmit/receive switch?
To direct driving voltages to the transducer
What happens to the echo signal as it travels farther from the transducer?
It becomes weaker due to attenuation
What is the purpose of amplification in ultrasound technology?
To increase voltage amplitudes
What is the effect of attenuation on the image?
It causes echoes from identical reflectors at different depths to have different amplitudes
What is the purpose of time gain compensation (TGC)?
To equalize differences in received echo amplitudes caused by different reflector depths
What is the function of the amplifiers in ultrasound technology?
To increase voltage amplitudes and compensate for attenuation
What is the purpose of analog-to-digital converters (ADCs) in ultrasound technology?
To convert voltage from analog to digital form
What is the term for the increase in voltage amplitudes?
Gain
What happens to the echo signal as it travels back to the transducer?
It becomes weaker due to attenuation
What is the purpose of the transducer in ultrasound technology?
To transmit and receive echo signals
What is the primary function of the transmit/receive switch in ultrasound technology?
To direct the driving voltages and echo voltages
What is the purpose of amplification in ultrasound technology?
To increase the voltage amplitudes
What happens to the echo signal as it travels farther from the transducer?
It becomes weaker due to attenuation
What is the purpose of time gain compensation (TGC) in ultrasound technology?
To equalize differences in received echo amplitudes caused by different reflector depths
What is the function of analog-to-digital converters (ADCs) in ultrasound technology?
To convert analog voltage to digital form
What is the effect of attenuation on the image?
It decreases the brightness of the image
What is the purpose of pulse delays in ultrasound technology?
To delay the pulse transmission
What is the result of amplification in ultrasound technology?
An increase in voltage amplitudes
What happens to the echo signal as it travels back to the transducer?
It becomes weaker due to attenuation
What is the purpose of the transducer in ultrasound technology?
To convert electrical energy into sound waves
Study Notes
Transmit/Receive (T/R) Switch
- Directs driving voltages from pulser and pulse delays to transducer during transmission
- Directs returning echo voltages from transducer to amplifiers during reception
Amplifiers
- Convert small voltages from transducer elements to larger ones suitable for further processing and storage
- Increase voltage amplitudes, which is called gain
- Gain is set subjectively to make echoes appear with appropriate brightnesses
- Compensate for effect of attenuation on image through time gain compensation (TGC)
- TGC equalizes differences in received echo amplitudes caused by different reflector depths
Time Gain Compensation (TGC)
- Reflectors with equal reflection coefficients produce echoes of unequal amplitudes if at different distances from transducer
- TGC ensures echoes from identical reflectors at different depths have identical amplitudes
- Compensates for attenuation effect on echoes from deeper reflectors
Analog-to-Digital Converters (ADCs)
- Convert analog voltage to digital form
- Analog means "proportional", digital means "in the form of discrete numbers"
Transmit/Receive (T/R) Switch
- Directs driving voltages from pulser and pulse delays to transducer during transmission
- Directs returning echo voltages from transducer to amplifiers during reception
Amplifiers
- Convert small voltages from transducer elements to larger ones suitable for further processing and storage
- Increase voltage amplitudes, which is called gain
- Gain is set subjectively to make echoes appear with appropriate brightnesses
- Compensate for effect of attenuation on image through time gain compensation (TGC)
- TGC equalizes differences in received echo amplitudes caused by different reflector depths
Time Gain Compensation (TGC)
- Reflectors with equal reflection coefficients produce echoes of unequal amplitudes if at different distances from transducer
- TGC ensures echoes from identical reflectors at different depths have identical amplitudes
- Compensates for attenuation effect on echoes from deeper reflectors
Analog-to-Digital Converters (ADCs)
- Convert analog voltage to digital form
- Analog means "proportional", digital means "in the form of discrete numbers"
Transmit/Receive (T/R) Switch
- Directs driving voltages from pulser and pulse delays to transducer during transmission
- Directs returning echo voltages from transducer to amplifiers during reception
Amplifiers
- Convert small voltages from transducer elements to larger ones suitable for further processing and storage
- Increase voltage amplitudes, which is called gain
- Gain is set subjectively to make echoes appear with appropriate brightnesses
- Compensate for effect of attenuation on image through time gain compensation (TGC)
- TGC equalizes differences in received echo amplitudes caused by different reflector depths
Time Gain Compensation (TGC)
- Reflectors with equal reflection coefficients produce echoes of unequal amplitudes if at different distances from transducer
- TGC ensures echoes from identical reflectors at different depths have identical amplitudes
- Compensates for attenuation effect on echoes from deeper reflectors
Analog-to-Digital Converters (ADCs)
- Convert analog voltage to digital form
- Analog means "proportional", digital means "in the form of discrete numbers"
This quiz covers the basics of ultrasound technology, including the transmit/receive switch and amplifiers.
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