Ultrasound Beam Former and Pulser

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Questions and Answers

What is the primary function of the pulser in the beam former?

  • To delay the ultrasound pulse
  • To generate the voltages that drive the transducer (correct)
  • To convert analog signals to digital
  • To amplify the ultrasound pulse

What is the effect of reducing the acoustic output of the pulser?

  • Decrease in echo amplitude (correct)
  • No change in echo amplitude
  • Increase in echo amplitude
  • No effect on echo amplitude

What is the purpose of pulse delays in phased array transducers?

  • To convert analog signals to digital
  • To display the output level in decibels
  • To amplify the ultrasound pulse
  • To accurately calculate delays to steer and focus the beam electronically (correct)

What is the function of the amplifiers in the beam former?

<p>To amplify the received echoes (D)</p> Signup and view all the answers

What is the unit of measurement for the output level of the pulser?

<p>Percentage (B)</p> Signup and view all the answers

What is the purpose of the summer in the beam former?

<p>To combine the echoes from each channel (B)</p> Signup and view all the answers

What is the effect of increasing the amplifier gain?

<p>Compensate for reduced acoustic output (B)</p> Signup and view all the answers

What is the function of the analog-to-digital converters in the beam former?

<p>To convert analog signals to digital (C)</p> Signup and view all the answers

What is the purpose of the transmit/receive (T/R) switch?

<p>To switch between transmission and reception modes (D)</p> Signup and view all the answers

What is the primary function of the beam former?

<p>To process the received echoes (B)</p> Signup and view all the answers

What drives the transducer?

<p>Pulser (B)</p> Signup and view all the answers

What determines the pulse repetition frequency?

<p>Pulser (B)</p> Signup and view all the answers

What is the effect of increasing the pulser voltage amplitude?

<p>Increased ultrasound pulse amplitude (A)</p> Signup and view all the answers

What is the purpose of the pulse delays in phased array transducers?

<p>To steer and focus the beam electronically (B)</p> Signup and view all the answers

What is displayed on the output indicator?

<p>Output level as a percentage or decibels relative to maximum (A)</p> Signup and view all the answers

What compensates for reduced acoustic output?

<p>Increase in amplifier gain (D)</p> Signup and view all the answers

What is the function of the transmit/receive switch?

<p>To switch between transmission and reception modes (D)</p> Signup and view all the answers

What is the purpose of the summer?

<p>To add the echo signals together (D)</p> Signup and view all the answers

What are the components of a reception channel?

<p>Element, amplifier, analog-to-digital converter, and delay (D)</p> Signup and view all the answers

What is the effect of reducing the acoustic output on the received echo amplitude?

<p>Decreases the echo amplitude (C)</p> Signup and view all the answers

What is the role of the pulser in generating the ultrasound pulse?

<p>It generates the voltages that drive the transducer (C)</p> Signup and view all the answers

What determines the direction and focus of the beam in phased array transducers?

<p>The pulse delays (D)</p> Signup and view all the answers

What is the effect of increasing the pulser voltage amplitude?

<p>It increases the amplitude and intensity of the ultrasound pulse (B)</p> Signup and view all the answers

What is the purpose of the amplifiers in the beam former?

<p>To compensate for reduced acoustic output (D)</p> Signup and view all the answers

What is the function of the summer in the beam former?

<p>To combine the echoes from each channel (A)</p> Signup and view all the answers

What is the purpose of the transmit/receive (T/R) switch?

<p>To switch between transmission and reception modes (A)</p> Signup and view all the answers

What is the role of the analog-to-digital converters in the beam former?

<p>To convert analog signals to digital signals (B)</p> Signup and view all the answers

What determines the pulse repetition frequency in the beam former?

<p>The pulser (D)</p> Signup and view all the answers

What is displayed on the output indicator?

<p>The acoustic output as a percentage or decibels relative to maximum (C)</p> Signup and view all the answers

What is the function of each channel in the transmission channel?

<p>An independent amplifier and transducer element combination (C)</p> Signup and view all the answers

What is the primary component that generates the voltages that drive the transducer?

<p>Pulser (C)</p> Signup and view all the answers

What is the purpose of the pulse delays in the beam former?

<p>To steer and focus the beam electronically (B)</p> Signup and view all the answers

What is the effect of increasing the amplifier gain on the received echo amplitude?

<p>It compensates for reduced acoustic output (B)</p> Signup and view all the answers

What is the unit of measurement for the output level of the pulser?

<p>Percentages (C)</p> Signup and view all the answers

What is the role of the transmit/receive switch in the beam former?

<p>It switches between transmit and receive modes (B)</p> Signup and view all the answers

What is the component that converts the analog signal to digital in the beam former?

<p>Analog-to-digital converter (D)</p> Signup and view all the answers

What is the purpose of the summer in the beam former?

<p>To combine the signals from multiple channels (B)</p> Signup and view all the answers

What determines the pulse repetition frequency in the beam former?

<p>The pulser (C)</p> Signup and view all the answers

What is the component that consists of an independent delay and transducer element combination in the beam former?

<p>Transmission channel (C)</p> Signup and view all the answers

What is the effect of reducing the acoustic output of the pulser on the received echo amplitude?

<p>It reduces the echo amplitude (B)</p> Signup and view all the answers

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Study Notes

Beam Former

  • The beam former is the origin of the ultrasound signal and consists of several components, including a pulser, pulse delays, transmit/receive (T/R) switch, amplifiers, analog-to-digital converters, echo delays, and a summer.

Pulser (Transmitter)

  • The pulser generates the voltages that drive the transducer, with the amplitude and intensity of the ultrasound pulse produced by the transducer directly proportional to the voltage amplitude produced by the pulser.
  • The pulser determines the pulse repetition frequency, pulse repetition period, and pulse amplitude.
  • The output level of the pulser can be shown on the display as a percentage or decibels relative to the maximum (100% or 0 dB) output.

Pulse Delays

  • The pulse delays have a single input from the pulser and multiple outputs to the transducer elements.
  • The pulse delays are crucial in phased array transducers, allowing for electronic beam steering and focusing, enabling real-time adjustments to the beam's direction and focus without moving the transducer physically.
  • In transmission, each channel consists of an independent delay and transducer element combination, with multiple channels emanating from the pulser.
  • In reception, each channel consists of an independent element, amplifier, analog-to-digital converter, and delay.

Beam Former

  • The beam former is the origin of the ultrasound signal and consists of several components, including a pulser, pulse delays, transmit/receive (T/R) switch, amplifiers, analog-to-digital converters, echo delays, and a summer.

Pulser (Transmitter)

  • The pulser generates the voltages that drive the transducer, with the amplitude and intensity of the ultrasound pulse produced by the transducer directly proportional to the voltage amplitude produced by the pulser.
  • The pulser determines the pulse repetition frequency, pulse repetition period, and pulse amplitude.
  • The output level of the pulser can be shown on the display as a percentage or decibels relative to the maximum (100% or 0 dB) output.

Pulse Delays

  • The pulse delays have a single input from the pulser and multiple outputs to the transducer elements.
  • The pulse delays are crucial in phased array transducers, allowing for electronic beam steering and focusing, enabling real-time adjustments to the beam's direction and focus without moving the transducer physically.
  • In transmission, each channel consists of an independent delay and transducer element combination, with multiple channels emanating from the pulser.
  • In reception, each channel consists of an independent element, amplifier, analog-to-digital converter, and delay.

Beam Former

  • The beam former is the origin of the ultrasound signal and consists of several components, including a pulser, pulse delays, transmit/receive (T/R) switch, amplifiers, analog-to-digital converters, echo delays, and a summer.

Pulser (Transmitter)

  • The pulser generates the voltages that drive the transducer, with the amplitude and intensity of the ultrasound pulse produced by the transducer directly proportional to the voltage amplitude produced by the pulser.
  • The pulser determines the pulse repetition frequency, pulse repetition period, and pulse amplitude.
  • The output level of the pulser can be shown on the display as a percentage or decibels relative to the maximum (100% or 0 dB) output.

Pulse Delays

  • The pulse delays have a single input from the pulser and multiple outputs to the transducer elements.
  • The pulse delays are crucial in phased array transducers, allowing for electronic beam steering and focusing, enabling real-time adjustments to the beam's direction and focus without moving the transducer physically.
  • In transmission, each channel consists of an independent delay and transducer element combination, with multiple channels emanating from the pulser.
  • In reception, each channel consists of an independent element, amplifier, analog-to-digital converter, and delay.

Beam Former

  • The beam former is the origin of the ultrasound signal and consists of several components, including a pulser, pulse delays, transmit/receive (T/R) switch, amplifiers, analog-to-digital converters, echo delays, and a summer.

Pulser (Transmitter)

  • The pulser generates the voltages that drive the transducer, with the amplitude and intensity of the ultrasound pulse produced by the transducer directly proportional to the voltage amplitude produced by the pulser.
  • The pulser determines the pulse repetition frequency, pulse repetition period, and pulse amplitude.
  • The output level of the pulser can be shown on the display as a percentage or decibels relative to the maximum (100% or 0 dB) output.

Pulse Delays

  • The pulse delays have a single input from the pulser and multiple outputs to the transducer elements.
  • The pulse delays are crucial in phased array transducers, allowing for electronic beam steering and focusing, enabling real-time adjustments to the beam's direction and focus without moving the transducer physically.
  • In transmission, each channel consists of an independent delay and transducer element combination, with multiple channels emanating from the pulser.
  • In reception, each channel consists of an independent element, amplifier, analog-to-digital converter, and delay.

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