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Chapter-06 Acoustic Radiation Force Impulse Imaging

BOOK TITLE: Breast Elastography: Basic Principles and Interpretation of Clinical Cases

Author
1. Gkali Christina An.
ISBN
9789352700578
DOI
10.5005/jp/books/14228_7
Edition
1/e
Publishing Year
2018
Pages
16
Author Affiliations
1. "Alexandra" General Hospital of Athens, Athens, Greece
Chapter keywords
Acoustic radiation force impulse, ARFI, virtual touch imaging, VTI, region of interest, VTI grayscale image, virtual touch quantification, VTQ, virtual touch IQ

Abstract

This chapter seeks to familiarize the readers with acoustic radiation force impulse imaging. This mode has the advantage of being objective and independent of the sonographer. Instead of using external compression, ultrasound (US) scanners are used to generate short-duration acoustic radiation forces that impart small localized displacements in the tissue. Virtual touch imaging (VTI), similar to strain imaging, provides a qualitative elastogram. The VTI image depicts the relative stiffness in the selected ROI with a grayscale and also a color map. Qualitative evaluation of VTI grayscale image, evaluation of color map VTI image, virtual touch quantification, and virtual touch IQ (VTIQ) are the important topics which are discussed briefly throughout this chapter.

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