Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras

Method and Apparatus to obtain Sub-pitch Precision in Lateral Motion Estimation in Ultrasound Elastography

Technology Category/Market

Category – Biomedical Engineering

Applications –Ultrasound techniques, Medical and Surgical,  imaging systems,

Industry – Biomedical

Market -The global medical imaging market size is expected to grow from $40.33 billion in 2023 to $61.51 billion in 2030, at a CAGR of 6.2% in the forecast period

Image

Problem Statement

  • Lateral Displacement Estimates (LDE) from ultrasound data has several benefits like obtaining accurate inverse solutions in elastography, improving shear strain elastogram quality, obtaining good quality poroelastograms, reliable rotation elastogram etc.
  • Current methods are reliable only when the imaged medium is homogeneous, or if the displacement continuity is preserved at the boundaries in the case of non-homogeneous medium

Technology

This method is about estimating the Lateral (side-to-side) Motion of a Target in Ultrasound Imaging over a specific time interval “t.”

  • Involves method that utilizes data from sub-pitch locations to improve the image quality parameters
  • Lateral Motion Estimation  of a target  in ultrasound imaging sub-pitch precision is obtained at a distance half of the pitch (ie. λ/2) by translating the sub-aperture by activating odd number of consecutive elements and even number of consecutive elements sequentially.
  • Two approaches have been used viz. Actuator Beam Translation (ABT) method (pre and post) and Electronic Beam Translation (EBT) method.

Key Features/Value Proposition

Technical Perspective:

  • Improvement in precision of LDE obtained by augmenting true RF A-lines at sub-pitch locations compared to interpolating the post-beamformed RF A-line(Fig 1A, B, C)
  • The acquired new frame data that includes pre-compression and post-compression RF data and is further processed for image formation that may yield better lateral resolution and lateral displacement estimation (LDE).

User Perspective:

  • The sub-pitch precision in lateral displacement estimates improve the quality of shear strain elastograms,poroelastograms,rotation elastograms, LSE etc.
  • Particularly useful in scenarios where targets may move or deform laterally.
Questions about this Technology?

Contact for Licensing

Research Lab

Prof. Arun K. Thittai

Department of Applied Mechanics

Intellectual Property

  • IITM IDF Ref. 1494
  • IN201641043467

Technology Readiness Level

TRL- 4

Technology Validated in the Lab

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