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Questions and Answers
What is the main function of the transmit/receive (T/R) switch?
What is the main function of the transmit/receive (T/R) switch?
- To compensate for the effect of attenuation on the image
- To amplify the voltage received from the transducer
- To convert the analog voltage from the transducer to digital form
- To direct the driving voltages from the pulser to the transducer during transmission and then direct the returning echo voltages from the transducer to the amplifiers during reception (correct)
What is the purpose of amplification in ultrasound imaging?
What is the purpose of amplification in ultrasound imaging?
- To convert the analog voltage from the transducer to digital form
- To direct the driving voltages from the pulser to the transducer during transmission
- To compensate for the effect of attenuation on the image
- To convert the small voltages received from the transducer elements to larger ones suitable for further processing and storage (correct)
What is meant by the term 'gain' in ultrasound imaging?
What is meant by the term 'gain' in ultrasound imaging?
- The effect of attenuation on the image
- The increase in voltage amplitudes during amplification (correct)
- The conversion of analog voltage to digital form
- The process of directing the driving voltages from the pulser to the transducer
What is the purpose of time gain compensation (TGC) in ultrasound imaging?
What is the purpose of time gain compensation (TGC) in ultrasound imaging?
What happens to the echo from the second reflector in the diagram, compared to the first reflector?
What happens to the echo from the second reflector in the diagram, compared to the first reflector?
What is the function of an analog-to-digital converter (ADC) in ultrasound imaging?
What is the function of an analog-to-digital converter (ADC) in ultrasound imaging?
What is the meaning of the term 'analog' in ultrasound imaging?
What is the meaning of the term 'analog' in ultrasound imaging?
What is the meaning of the term 'digital' in ultrasound imaging?
What is the meaning of the term 'digital' in ultrasound imaging?
What happens to the echoes from identical reflectors at different depths after time gain compensation (TGC)?
What happens to the echoes from identical reflectors at different depths after time gain compensation (TGC)?
Why is it necessary to compensate for the effect of attenuation on the image in ultrasound imaging?
Why is it necessary to compensate for the effect of attenuation on the image in ultrasound imaging?
What determines the brightness of echoes in ultrasound imaging?
What determines the brightness of echoes in ultrasound imaging?
What is the effect of attenuation on the image in ultrasound imaging?
What is the effect of attenuation on the image in ultrasound imaging?
What is the purpose of the pulser in ultrasound imaging?
What is the purpose of the pulser in ultrasound imaging?
What is the result of uncompensated echoes from identical structures at differing depths?
What is the result of uncompensated echoes from identical structures at differing depths?
What happens to the voltage from the transducer elements after amplification?
What happens to the voltage from the transducer elements after amplification?
What is the role of the transducer in ultrasound imaging?
What is the role of the transducer in ultrasound imaging?
What is the effect of time gain compensation (TGC) on the image in ultrasound imaging?
What is the effect of time gain compensation (TGC) on the image in ultrasound imaging?
What is the main purpose of the amplifiers in ultrasound imaging?
What is the main purpose of the amplifiers in ultrasound imaging?
What happens to the echo voltages from the transducer during reception?
What happens to the echo voltages from the transducer during reception?
What is the purpose of the analog-to-digital converter (ADC) in ultrasound imaging?
What is the purpose of the analog-to-digital converter (ADC) in ultrasound imaging?
What is the primary function of the T/R switch?
What is the primary function of the T/R switch?
What is the purpose of amplification in ultrasound imaging?
What is the purpose of amplification in ultrasound imaging?
What is the effect of uncompensated echoes from identical structures at different depths?
What is the effect of uncompensated echoes from identical structures at different depths?
What is the role of the transducer in ultrasound imaging?
What is the role of the transducer in ultrasound imaging?
What happens to the voltage amplitudes after amplification?
What happens to the voltage amplitudes after amplification?
What is the purpose of the ADC in ultrasound imaging?
What is the purpose of the ADC in ultrasound imaging?
What is the result of time gain compensation (TGC) on the image?
What is the result of time gain compensation (TGC) on the image?
What is the effect of attenuation on the image?
What is the effect of attenuation on the image?
Why is it necessary to compensate for the effect of attenuation on the image?
Why is it necessary to compensate for the effect of attenuation on the image?
What determines the gain of the amplifiers in ultrasound imaging?
What determines the gain of the amplifiers in ultrasound imaging?
Study Notes
Transmit/Receive (T/R) Switch
- Directs driving voltages from pulser and pulse delays to the transducer during transmission
- Directs returning echo voltages from the transducer to the amplifiers during reception
Amplifiers
- Increase voltage amplitudes through a process called gain
- Gain is set subjectively to achieve appropriate brightnesses for echoes
- Compensate for the effect of attenuation on the image through time gain compensation (TGC)
- TGC equalizes differences in received echo amplitudes caused by different reflector depths
Attenuation and Time Gain Compensation (TGC)
- Echoes from identical reflectors at different distances from the transducer have different amplitudes due to attenuation
- The farther an incident pulse travels, the weaker the echo becomes due to attenuation
- TGC amplifier compensates for attenuation, ensuring that echoes from identical structures at different depths have identical amplitudes
Analog-to-Digital Converters (ADCs)
- Convert voltage from analog to digital form
- Analog refers to a proportional signal, while digital refers to a signal in the form of discrete numbers
Transmit/Receive (T/R) Switch
- Directs driving voltages from pulser and pulse delays to the transducer during transmission
- Directs returning echo voltages from the transducer to the amplifiers during reception
Amplifiers
- Increase voltage amplitudes through a process called gain
- Gain is set subjectively to achieve appropriate brightnesses for echoes
- Compensate for the effect of attenuation on the image through time gain compensation (TGC)
- TGC equalizes differences in received echo amplitudes caused by different reflector depths
Attenuation and Time Gain Compensation (TGC)
- Echoes from identical reflectors at different distances from the transducer have different amplitudes due to attenuation
- The farther an incident pulse travels, the weaker the echo becomes due to attenuation
- TGC amplifier compensates for attenuation, ensuring that echoes from identical structures at different depths have identical amplitudes
Analog-to-Digital Converters (ADCs)
- Convert voltage from analog to digital form
- Analog refers to a proportional signal, while digital refers to a signal in the form of discrete numbers
Transmit/Receive (T/R) Switch
- Directs driving voltages from pulser and pulse delays to the transducer during transmission
- Directs returning echo voltages from the transducer to the amplifiers during reception
Amplifiers
- Increase voltage amplitudes through a process called gain
- Gain is set subjectively to achieve appropriate brightnesses for echoes
- Compensate for the effect of attenuation on the image through time gain compensation (TGC)
- TGC equalizes differences in received echo amplitudes caused by different reflector depths
Attenuation and Time Gain Compensation (TGC)
- Echoes from identical reflectors at different distances from the transducer have different amplitudes due to attenuation
- The farther an incident pulse travels, the weaker the echo becomes due to attenuation
- TGC amplifier compensates for attenuation, ensuring that echoes from identical structures at different depths have identical amplitudes
Analog-to-Digital Converters (ADCs)
- Convert voltage from analog to digital form
- Analog refers to a proportional signal, while digital refers to a signal in the form of discrete numbers
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Description
Understanding the roles of transmit/receive switch and amplifiers in ultrasound technology. Learn how they work together to process and store echo voltages.
