11 April 2002 Application of the Born-approximation deconvolved inverse scattering (BADIS) method to second harmonic imaging
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Abstract
The Born-approximation deconvolved inverse scattering (BADIS) imaging technique is an alternative to the conventional pulse-echo method, which presents the magnitude of the reflected pulse as the distribution of the target acoustic reflectivity. BADIS deconvolves the incident pulse from the reflected pulse, and uses the resulting impulse response to produce an image of the acoustic impedance distribution. It is applicable mainly to structures that resemble a layered medium. The images captured by this method prove to have improved resolution and are free of speckle. With the BADIS method one can use ultrasound of lower frequencies than would be required by the pulse-echo method to achieve the same resolution. To provide further improvement of images the second harmonic signals can be employed. Here we describe the combined BADIS-Harmonic Imaging method. For this purpose the hybrid transducer by Krautkramer Branson Co., which consists of a cylindrical 5 MHz transducer wrapped in an annulus-shaped 2.25 MHz transducer, has been used. The image phantom was a two- plastic film structure with drilled holes in the top layer. It is shown that the BADIS analysis of the second harmonic reflection data provides improved images.
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Nikolay A. Kharin, Nikolay A. Kharin, Diana Driscoll, Diana Driscoll, William Tobocman, William Tobocman, } "Application of the Born-approximation deconvolved inverse scattering (BADIS) method to second harmonic imaging", Proc. SPIE 4687, Medical Imaging 2002: Ultrasonic Imaging and Signal Processing, (11 April 2002); doi: 10.1117/12.462185; https://doi.org/10.1117/12.462185
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