Three-dimensional speckle-tracking imaging for left ventricular rotation measurement: An in vitro validation study

Zhiwen Zhou, Muhammad Ashraf, Dayi Hu, Xiaonan Dai, Yawei Xu, Bill Kenny, Berkley Cameron, Thuan Nguyen, Li Xiong, David J. Sahn

Research output: Contribution to journalArticle

33 Scopus citations

Abstract

Objective: Left ventricular (LV) twist is manifested in oppositely directed apical and basal rotation. We studied a new 3-dimensional (3D) echocardiography program (wall motion tracking; Toshiba America Medical Systems, Inc, Tustin, CA) for left ventricular rotation. Methods: We used a rotation model with a variable-speed motor to rotate hearts in a water bath. We studied 10 freshly harvested pig hearts, which were mounted on the rotary actuator of our twist phantom with the heart base rotating and the apex held fixed to avoid translational motion, at rotations of 0°, 15°, 20°, and 25°. Full-volume 3D image loops were acquired on a Toshiba Aplio Artida ultrasound system at a maximized frame rate. Results: As the actual heart rotation increased, computed segmental and global rotation also increased accordingly, with the measured rotations of the basal and middle segments greater than that of the apex (both P < .001). Segmental and global rotation at all 3 levels correlated well with the actual rotation (base: r = 0.93; middle: r = 0.92; apex: r = 0.82; global: r = 0.95; all P < .001). Conclusions: The new 3D program tracked LV rotation accurately.

Original languageEnglish (US)
Pages (from-to)903-909
Number of pages7
JournalJournal of Ultrasound in Medicine
Volume29
Issue number6
DOIs
StatePublished - Jun 1 2010

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Keywords

  • 3-dimensional imaging
  • Left ventricular rotation
  • Speckle tracking

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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