On the Use of Spatial Coherence for in Situ Peak Rarefaction Pressure Estimation


Conference Paper

© 2018 IEEE. Tissue harmonic image quality has been shown to increase with elevated pressure output. The Peak Rarefaction Pressure (PRP) for a given transmit, however, is limited by the Mechanical Index (MI) guideline. We have previously demonstrated that the MI overestimates in situ PRP for tightly focused beams such as F/1.5 because it does not account for phase aberration. In this study, we propose a new spatial coherence based metric to estimate phase aberration and predict in vivo PRP. We show harmonic Short Lag Spatial Coherence (SLSC) to linearly correlate with in situ PRP with a 0.86 coefficient of determination across 11 different body walls. This correlation suggests the potential for more accurate PRP estimation in situ than the current MI scheme, allowing patient specific acoustic output.

Full Text

Duke Authors

Cited Authors

  • Zhang, B; Long, W; Pinton, GF; Nightingale, KR

Published Date

  • December 17, 2018

Published In

Volume / Issue

  • 2018-October /

Electronic International Standard Serial Number (EISSN)

  • 1948-5727

International Standard Serial Number (ISSN)

  • 1948-5719

International Standard Book Number 13 (ISBN-13)

  • 9781538634257

Digital Object Identifier (DOI)

  • 10.1109/ULTSYM.2018.8579928

Citation Source

  • Scopus