Beamformed nearfield imaging of a simulated coronary artery containing a stenosis

This paper is concerned with the potential for the detection and location of an artery containing a partial blockage by exploiting the space-time properties of the shear wave field in the surrounding elastic soft tissue. As a demonstration of feasibility, an array of piezoelectric film vibration sen...

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Bibliographic Details
Published in:IEEE transactions on medical imaging 1998-12, Vol.17 (6), p.900-909
Main Authors: Owsley, N.L., Hull, A.J.
Format: Article
Language:English
Subjects:
Amplifiers, Electronic
Array signal processing
Arteries
Biological and medical sciences
Biological tissues
Biophysical Phenomena
Biophysics
Blood and lymphatic vessels
Blood Flow Velocity
Blood vessels
Cardiology. Vascular system
Cardiovascular system
Color
Coronary Disease - diagnosis
Coronary Disease - physiopathology
Coronary Vessels - physiopathology
Diseases
Diseases of the peripheral vessels. Diseases of the vena cava. Miscellaneous
Feasibility Studies
Focusing
Frequency
Humans
Image coding
Mathematics
Medical sciences
Models, Anatomic
Models, Cardiovascular
Noninvasive medical procedures
Phonocardiography - instrumentation
Phonocardiography - methods
Phonocardiography - statistics & numerical data
Piezoelectric devices
Piezoelectric films
Sensor arrays
Sensors
Shear waves
Solids
Surgery
Time Factors
Tissue
Urethane
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Summary:This paper is concerned with the potential for the detection and location of an artery containing a partial blockage by exploiting the space-time properties of the shear wave field in the surrounding elastic soft tissue. As a demonstration of feasibility, an array of piezoelectric film vibration sensors is placed on the free surface of a urethane mold that contains a surgical tube. Inside the surgical tube is a nylon constriction that inhibits the water flowing through the tube. A turbulent field develops in and downstream from the blockage, creating a randomly fluctuating pressure on the inner wall of the tube. This force produces shear and compressional wave energy in the urethane. After the array is used to sample the dominant shear wave space-time energy field at low frequencies, a nearfield (i.e., focused) beamforming process then images the energy distribution in the three-dimensional solid. Experiments and numerical simulations are included to demonstrate the potential of this noninvasive procedure for the early identification of vascular blockages-the typical precursor of serious arterial disease in the human heart.
ISSN:0278-0062
1558-254X
DOI:10.1109/42.746623