Pinhas Ephrat

Lawson Health Research Institute, St Joseph's Health Care

Papers

Total Citations

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About

Pinhas Ephrat is a researcher whose work lies at the intersection of photoacoustic imaging and precision metrology. His key contributions focus on the critical challenge of accurately localizing photoacoustic sources—a problem central to the fidelity of tomographic image reconstruction. Ephrat pioneered the use of robotic source placement to systematically map and measure the sensitivity distribution of photoacoustic detectors. In his 2008 paper on this method, which has garnered 9 citations, he demonstrated how robotic positioning can characterize detector response, directly improving the accuracy of back projection-based reconstruction algorithms. He further advanced the field by developing a technique for measuring transducer position errors through robotic placement combined with nonlinear parameter estimation (6 citations). This work directly addressed a fundamental limitation in photoacoustic tomography: that positional inaccuracies in transducers propagate into source localization errors. By providing a robust framework for calibrating and validating transducer positions, Ephrat’s research has helped lay the groundwork for more reliable, high-fidelity photoacoustic imaging systems. His methodical approach to solving hardware-related uncertainties remains a valuable reference for researchers seeking to improve the quantitative accuracy of photoacoustic measurements.