TY - JOUR
T1 - Assessment of regional myocardial strain by a novel automated tracking system from digital image files
AU - Toyoda, Tomohiko
AU - Baba, Hirotaka
AU - Akasaka, Takashi
AU - Akiyama, Maki
AU - Neishi, Yoji
AU - Tomita, Junko
AU - Sukmawan, Renan
AU - Koyama, Yuji
AU - Watanabe, Nozomi
AU - Tamano, Satoshi
AU - Shinomura, Ryuichi
AU - Komuro, Issei
AU - Yoshida, Kiyoshi
PY - 2004/12
Y1 - 2004/12
N2 - Myocardial strain imaging by Doppler tissue echocardiography is a useful method to quantify regional left ventricular function. However, this method has a problem of its Doppler angle dependency. We attempted to quantify myocardial strain by a newly developed automated tracking system from digital image files. In 6 anesthetized open-chest dogs, a pair of ultrasonic crystals was implanted at the inner site and outer site of the left ventricular wall to measure myocardial radial strain. B-mode echocardiographic images and trajectories of crystals were recorded simultaneously. Three conditions were examined by intravenous infusion of dobutamine. We used a pattern matching algorithm, which allowed us to track objects from one frame to the next. In 18 image sequences obtained in the 6 dogs, there was an excellent correlation in maximal myocardial strain between the two methods (r = 0.92, P <. 0001). Thus, this system is a promising tool to provide automated quantification of regional myocardial strain.
AB - Myocardial strain imaging by Doppler tissue echocardiography is a useful method to quantify regional left ventricular function. However, this method has a problem of its Doppler angle dependency. We attempted to quantify myocardial strain by a newly developed automated tracking system from digital image files. In 6 anesthetized open-chest dogs, a pair of ultrasonic crystals was implanted at the inner site and outer site of the left ventricular wall to measure myocardial radial strain. B-mode echocardiographic images and trajectories of crystals were recorded simultaneously. Three conditions were examined by intravenous infusion of dobutamine. We used a pattern matching algorithm, which allowed us to track objects from one frame to the next. In 18 image sequences obtained in the 6 dogs, there was an excellent correlation in maximal myocardial strain between the two methods (r = 0.92, P <. 0001). Thus, this system is a promising tool to provide automated quantification of regional myocardial strain.
UR - http://www.scopus.com/inward/record.url?scp=9644308102&partnerID=8YFLogxK
U2 - 10.1016/j.echo.2004.07.010
DO - 10.1016/j.echo.2004.07.010
M3 - Article
C2 - 15562260
AN - SCOPUS:9644308102
SN - 0894-7317
VL - 17
SP - 1234
EP - 1238
JO - Journal of the American Society of Echocardiography
JF - Journal of the American Society of Echocardiography
IS - 12
ER -