Should the mechanical index be revised for ARFI imaging?


Journal Article

The mechanical index (MI) quantifies the likelihood that exposure to diagnostic ultrasound will produce an adverse biological effect by a nonthermal mechanism. The current formulation of the MI is based on inertial cavitation thresholds in two liquids, water and blood, as calculated by a formalism assuming very short pulse durations. Although tissue contains a high proportion of water, it is not a liquid but a viscoelastic solid. Further, acoustic radiation force impulse imaging employs high-intensity pulses up to several hundred acoustic periods long. The effect of these differences was studied in water, blood and five representative tissues.

Full Text

Duke Authors

Cited Authors

  • Church, CC; Labuda, C; Nightingale, K

Published Date

  • October 2012

Published In

Volume / Issue

  • 2012 /

Start / End Page

  • 17 - 20

PubMed ID

  • 24533174

Pubmed Central ID

  • 24533174

International Standard Serial Number (ISSN)

  • 1948-5719

Digital Object Identifier (DOI)

  • 10.1109/ULTSYM.2012.0005


  • eng