HYDROACOUSTICS
ANNUAL JOURNAL |
START | NEW VOL 20 | SEARCH | STATISTICS | PAS - GDANSK DIVISION |
pp. 231-236, vol. 16, 2013 Zbigniew Trawiński Department of Ultrasound, Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland Janusz Wójcik Department of Ultrasound, Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland Andrzej Nowicki Department of Ultrasound, Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland Robert Olszewski Cardiology & Internal Medicine Clinic, Military Institute of Medicine, Cardiac Rapid, Warsaw, Poland Key words: soft tissue; phantom; ultrasound Abstract: Two different tissue phantoms of the left ventricle to imitate a beating left ventricle were
developed: first was prepared using a sponge material and second phantom was constructed
using a polyvinyl alcohol material modeled into a homogeneous hollow cylinder:
approximately 10 cm and 12 cm in length for the first and second phantom, respectively. Both
phantoms were 5 cm in diameter, with a wall thickness of 1.0 cm. Additionally, a small part of
the wall of the second phantom was processed to simulate the stiffness of myocardial
infarction. The phantoms were connected at the end to an adjustable external pump. The
pulse volume inside the cylinder was set between 12 to 50 ml at rates of 40, 60, 100, 120
beats/minute. The phantoms were immersed in water for ultrasound scanning with two
different insonation angles (90 and 65 degrees). Strain and strain rate were measured with
different combinations of angles and pulse rates. The main aim of this work was to develop
the new method for validation of the human infarct wall strain calculation procedures using
the speckles tracking.
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