TY - JOUR
T1 - Three-dimensional speckle-tracking imaging for left ventricular rotation measurement
T2 - An in vitro validation study
AU - Zhou, Zhiwen
AU - Ashraf, Muhammad
AU - Hu, Dayi
AU - Dai, Xiaonan
AU - Xu, Yawei
AU - Kenny, Bill
AU - Cameron, Berkley
AU - Nguyen, Thuan
AU - Xiong, Li
AU - Sahn, David J.
PY - 2010/6/1
Y1 - 2010/6/1
N2 - 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.
AB - 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.
KW - 3-dimensional imaging
KW - Left ventricular rotation
KW - Speckle tracking
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U2 - 10.7863/jum.2010.29.6.903
DO - 10.7863/jum.2010.29.6.903
M3 - Article
C2 - 20498464
AN - SCOPUS:77952964347
SN - 0278-4297
VL - 29
SP - 903
EP - 909
JO - Journal of Ultrasound in Medicine
JF - Journal of Ultrasound in Medicine
IS - 6
ER -