Prof. John A. Hossack Profile

Prof. John A. Hossack

Associate Professor at Univ of Virginia

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Author

Publications (19)

Proceedings Article | 15 March 2018 Presentation

Multi-parametric photoacoustic microscopy with 1.2-MHz A-line rate (Conference Presentation)

Tianxiong Wang, Rui Cao, Sushanth Govinahallisathyanarayana, John Hossack, Song Hu

Proceedings Volume 10494, 104941M (2018) https://doi.org/10.1117/12.2289298

KEYWORDS: Photoacoustic microscopy, Transducers, Blood circulation, Ultrasonics, High speed imaging, Hemodynamics, Photoacoustic imaging, Image acquisition, Real time imaging, Blood

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Proceedings Article | 20 May 2015 Paper

Catheter ultrasound for cross-sectional imaging and drug delivery to vessel wall

John Hossack

Proceedings Volume 9496, 949606 (2015) https://doi.org/10.1117/12.2182103

KEYWORDS: Intravascular ultrasound, Ultrasonography, Transducers, Arteries, Acoustics, In vivo imaging, Imaging systems, Americium, Tissues, In vitro testing

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SPIE Journal Paper | 9 May 2013 Open Access

Intravascular near-infrared fluorescence catheter with ultrasound guidance and blood attenuation correction

Adam Dixon, John Hossack

JBO, Vol. 18, Issue 05, 056009, (May 2013) https://doi.org/10.1117/12.10.1117/1.JBO.18.5.056009

KEYWORDS: Luminescence, Intravascular ultrasound, Blood, Signal attenuation, Arteries, Distance measurement, Optical fibers, Ultrasonography, Data modeling, Statistical analysis

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Proceedings Article | 8 March 2013 Paper

Intravascular near-infrared fluorescence imaging with intravascular ultrasound guidance

Adam Dixon, William Guilford, John Hossack

Proceedings Volume 8565, 85653S (2013) https://doi.org/10.1117/12.2000878

KEYWORDS: Intravascular ultrasound, Luminescence, Blood, Tissue optics, Signal attenuation, Optical fibers, Data modeling, Calibration, Statistical analysis, Distance measurement

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Proceedings Article | 12 March 2007 Paper

The application of the principle of conserved myocardium volume in guiding automated chamber estimation in mouse cardiac imaging

Christopher Garson, Bing Li, John Hossack

Proceedings Volume 6513, 651312 (2007) https://doi.org/10.1117/12.716067

KEYWORDS: Data modeling, In vivo imaging, Heart, 3D modeling, Image segmentation, 3D image processing, Cardiac imaging, Image processing, Transducers, Computer simulations

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Proceedings Article | 16 March 2006 Paper

Fully sampled 3600 element two dimensional transducer array for low cost C-scan imaging

Matthew Eames, Shiwei Zhou, John Hossack

Proceedings Volume 6147, 61470S (2006) https://doi.org/10.1117/12.661500

KEYWORDS: Transducers, Finite element methods, Signal to noise ratio, Ceramics, Epoxies, Interference (communication), Ferroelectric materials, Electrodes, Silver, Acoustics

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Proceedings Article | 16 March 2006 Paper

The sonic window: second generation results

William Walker, Michael Fuller, Edward Brush, Matthew D. C. Eames, Kevin Owen, Karthik Ranganathan, Travis Blalock, John Hossack

Proceedings Volume 6147, 61470B (2006) https://doi.org/10.1117/12.661507

KEYWORDS: Digital signal processing, Ultrasonography, Transducers, Prototyping, Analog electronics, LCDs, Signal processing, Phased arrays, System integration, Signal to noise ratio

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Medical Ultrasound Imaging is widely used clinically because of its relatively low cost, portability, lack of ionizing radiation, and real-time nature. However, even with these advantages ultrasound has failed to permeate the broad array of clinical applications where its use could be of value. A prime example of this untapped potential is the routine use of ultrasound to guide intravenous access. In this particular application existing systems lack the required portability, low cost, and ease-of-use required for widespread acceptance. Our team has been working for a number of years to develop an extremely low-cost, pocket-sized, and intuitive ultrasound imaging system that we refer to as the "Sonic Window." We have previously described the first generation Sonic Window prototype that was a bench-top device using a 1024 element, fully populated array operating at a center frequency of 3.3 MHz. Through a high degree of custom front-end integration combined with multiplexing down to a 2 channel PC based digitizer this system acquired a full set of RF data over a course of 512 transmit events. While initial results were encouraging, this system exhibited limitations resulting from low SNR, relatively coarse array sampling, and relatively slow data acquisition. We have recently begun assembling a second-generation Sonic Window system. This system uses a 3600 element fully sampled array operating at 5.0 MHz with a 300 micron element pitch. This system extends the integration of the first generation system to include front-end protection, pre-amplification, a programmable bandpass filter, four sample and holds, and four A/D converters for all 3600 channels in a set of custom integrated circuits with a combined area smaller than the 1.8 x 1.8 cm footprint of the transducer array. We present initial results from this front-end and present benchmark results from a software beamformer implemented on the Analog Devices BF-561 DSP. We discuss our immediate plans for further integration and testing. This second prototype represents a major reduction in size and forms the foundation of a fully functional, fully integrated, pocket sized prototype.

Proceedings Article | 7 March 2006 Paper

High resolution three-dimensional prostate ultrasound imaging

Yinbo Li, Abhay Patil, John Hossack

Proceedings Volume 6147, 614704 (2006) https://doi.org/10.1117/12.661504

KEYWORDS: Tissues, Transducers, Prostate, Ultrasonography, 3D image processing, Cancer, Elastography, Image resolution, Prostate cancer, Image enhancement

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Proceedings Article | 12 April 2005 Paper

Combined elasticity and 3D imaging of the prostate

Yinbo Li, John Hossack

Proceedings Volume 5750, (2005) https://doi.org/10.1117/12.601624

KEYWORDS: Transducers, Prostate, Tissues, Ultrasonography, Image processing, 3D image processing, Imaging arrays, Stereoscopy, Prostate cancer, 3D acquisition

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Proceedings Article | 12 April 2005 Paper

3D perfusion mapping in the intact mouse heart after myocardial infarction using myocardial contrast echocardiography

Yinbo Li, Zequan Yang, Brent French, John Hossack

Proceedings Volume 5750, (2005) https://doi.org/10.1117/12.601623

KEYWORDS: Heart, 3D modeling, Ultrasonography, In vivo imaging, Scanners, Echocardiography, Mouse models, Spatial resolution, Transducers, Tissues

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Proceedings Article | 28 April 2004 Paper

Myocardial contrast echocardiography to assess perfusion in a mouse model of ischemia/reperfusion injury

John Hossack, Yinbo Li, Jonathan Christensen, Zequan Yang, Brent French

Proceedings Volume 5373, (2004) https://doi.org/10.1117/12.540347

KEYWORDS: Ischemia, Heart, Video, Scanners, Image segmentation, Blood circulation, Injuries, Image analysis, Echocardiography, Mouse models

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Proceedings Article | 28 April 2004 Paper

A prototype low-cost handheld ultrasound imaging system

Karthik Ranganathan, Mary Santy, Michael Fuller, Shiwei Zhou, Travis Blalock, John Hossack, William Walker

Proceedings Volume 5373, (2004) https://doi.org/10.1117/12.537724

KEYWORDS: Phased arrays, Ultrasonography, Digital signal processing, Data centers, Transducers, Apodization, Linear filtering, Image quality, Prototyping, Optical simulations

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Proceedings Article | 23 May 2003 Paper

Finite element modeling of laser-based thermoelastic ultrasound generation

Shiwei Zhou, Paul Reynolds, Roland Krause, Takashi Buma, Matthew O'Donnell, John Hossack

Proceedings Volume 5035, (2003) https://doi.org/10.1117/12.479928

KEYWORDS: Finite element methods, Glasses, Ultrasonography, Acoustics, Chromium, Wave propagation, Laser development, Carbon, 3D modeling, Transducers

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Proceedings Article | 23 May 2003 Paper

Estimation of diagonal motion in 3D ultrasound imaging using a modified transducer

Jun Ha, John Hossack

Proceedings Volume 5035, (2003) https://doi.org/10.1117/12.488348

KEYWORDS: Imaging arrays, Speckle, Transducers, Motion estimation, Ultrasonography, 3D image processing, Data acquisition, Scanners, Computer simulations, MATLAB

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Proceedings Article | 11 April 2002 Paper

Quantitative Doppler ultrasound-based determination of volumetric blood flow

Jun Ha, John Hossack

Proceedings Volume 4687, (2002) https://doi.org/10.1117/12.462155

KEYWORDS: Doppler effect, Transducers, Ultrasonography, Blood circulation, Velocity measurements, Data acquisition, Blood, Signal processing, Arteries, 3D acquisition

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Proceedings Article | 30 May 2001 Paper

Quantitative free-hand 3D ultrasound imaging based on a modified 1D transducer array

John Hossack, Jun Ha, Thilaka Sumanaweera

Proceedings Volume 4325, (2001) https://doi.org/10.1117/12.428230

KEYWORDS: Transducers, Imaging arrays, Ultrasonography, 3D image processing, 3D acquisition, Motion estimation, Tissues, Data acquisition, Electrodes, Magnetism

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Proceedings Article | 30 May 2001 Paper

Development of a parallel acquisition system for ultrasound research

Christopher Fabian, Kailash Ballu, John Hossack, Travis Blalock, William Walker

Proceedings Volume 4325, (2001) https://doi.org/10.1117/12.428238

KEYWORDS: Data acquisition, Phased arrays, Ultrasonography, Tissues, Imaging systems, Signal processing, Transducers, Algorithm development, Data archive systems, Blood circulation

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Proceedings Article | 10 April 1997 Paper

New beam-forming approach using high-bandwidth transducers

John Hossack

Proceedings Volume 3037, (1997) https://doi.org/10.1117/12.271319

KEYWORDS: Phased arrays, Transducers, Ultrasonography, Tissues, Signal attenuation, Bandpass filters, Diagnostics, Apodization, Image transmission, Data acquisition

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Proceedings Article | 5 November 1992 Paper

Improving transducer performance using multiple active layers

John Hossack, B. Auld

Proceedings Volume 1733, (1992) https://doi.org/10.1117/12.130606

KEYWORDS: Transducers, Distortion, Multilayers, Diffraction, Epoxies, Composites, Receivers, Ultrasonography, Particles, Ceramics

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Showing 5 of 19 publications

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