Ultrasound Shear Wave Elastography in Cardiology and Ultrasound
This article explores the application of ultrasound shear wave elastography in cardiology and ultrasound imaging. It covers the principles of shear wave elastography, its use in assessing tissue stiffness, and the proposed SR template for elastography of organs/tissues such as the liver, breast, and prostate. The content delves into the background, design choices, and example result tables related to shear wave elastography.
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Presentation Transcript
Supplement 227: Ultrasound Elastography SR Working Group 1/12: Cardiology/Ultrasound Public Comment 2021 December
Overview Scope: Ultrasound shear wave elastography Open Issue: Address Strain Elastography? Closed Issue: MRE is out of scope SR template is proposed for elastography of organs/tissues such as liver, breast, prostate 2
Background Ultrasound can measure the speed at which an induced shear wave propagates through tissue (Shear Wave Speed in m/s). SWS depends on the stiffness of the tissue and thus can be converted into an estimated Elasticity in kPa. A SWS elastography report typically involves drawing 3-12 ROIs (usually circles or squares) at differing depths on the acquired images, recording the mean and Standard Deviation values for SWS and Elasticity within each ROI, and then computing specific summary statistics across the ROIs.
Design Choices Use existing SR SOP Classes - Follows the precedent of most other Ultrasound reports Add a general Ultrasound Report root template - All existing Ultrasound roots were very application specific - Based on Vascular root (which several vendors already do) Add an Ultrasound Elastography sub-Template 4
Example Result Tables ROI # Shear Wave Speed (m/s) Elasticity (kPa) ROI Mean Dispersion (m/s/kHz) ROI Depth (cm) ROI Mean ROI SD ROI SD ROI Mean ROI SD 1 2 R Summary Statistics Mean SD Median IQR IQR/Median Shear Wave Speed (m/s) Elasticity (kPa) Dispersion (m/s/kHz)
