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All QIBA PHANTOMS

All QIBA PHANTOMS. C52 Transducer held in ring stand – verasonics system Phantom on turntable – 8 rotation angles 7 transducer locations 3 focal depths (40, 60, 80 mm) SWS estimates: Bandpass filter 100-1000 Hz Ransac algorithm – fov ~ 2 cmx2cm

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All QIBA PHANTOMS

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  1. All QIBA PHANTOMS • C52 Transducer held in ring stand – verasonics system • Phantom on turntable – 8 rotation angles • 7 transducer locations • 3 focal depths (40, 60, 80 mm) • SWS estimates: • Bandpass filter 100-1000 Hz • Ransac algorithm – fov ~ 2 cmx2cm • Error bars mean +/- 1 std. dev from 56 measures

  2. Results 40 60 80 1786-X 1787-X

  3. Sim Results – Lateral Regression Window Location Window positions Blue 0-12 mm Red 1-12 Green 2-12 Black 4-12 • Conclusion – you must be outside the ROE (near field of shear wave) to get consistent speeds • Also- depth dependence here was within numerical error???

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