Sample interview questions: Describe the various methods used for sound source localization in medical imaging.
Sample answer:
Acoustic Radiation Force Imaging (ARFI)
- Uses focused ultrasound to generate radiation force, which displaces tissue
- Monitors tissue displacement using ultrasound imaging
- Provides information about tissue elasticity, which can be used to differentiate between healthy and diseased tissue
Passive Acoustic Mapping (PAM)
- Records acoustic emissions from sources within the body, such as heartbeats or breathing
- Analyzes the time difference of arrival (TDOA) of signals at multiple sensors
- Reconstructs the location of sound sources using algorithms
Synthetic Aperture Focusing Techniques (SAFT)
- Uses a phased array of transducers to collect ultrasound data
- Synthesizes a larger virtual aperture by combining data from individual elements
- Improves spatial resolution and allows accurate sound source localization
Time-Reversal Acoustics (TRA)
- Transmits a time-reversed version of a measured acoustic signal back into the medium
- The time-reversed signal converges at th… Read full answer
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