All QIBA PHANTOMS

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
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???