Selected Publications

Articles published or accepted in refereed journals:
• C.A. Samson, A. Bezanson, J.A. Brown, “A Sub Nyquist, Variable Sampling, High Frequnecy Phased Array Beamformer,” IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control, (In Press, manuscript no. TUFFC-07930-2016)
• D. MacDougall, J. Farrell, M. Bance, J.A. Brown, R.A. Adamson, “Swept-Source Optical Coherence Tomography for Real-Time In-Vivo Otology Imaging with GPU Accelerated Doppler Vibrography,” Biomedical Optics Express, Vol. 16, Issue 11, pp. 4621-4635, 2016
• J. Rainsbury, T. Landry, J.A. Brown, R. Adamson, M. Bance, “High-Frequency Ex-Vivo Ultrasound Imaging of the Middle Ear to Show Simulated Pathology,” Otology and Neurotology, Vol 37(5), pp. 586-592, 2016.
• A. Kotiya, M.Bance, J. Leadbetter, J.A. Brown, R. Adamson, “Functional Testing of Subcutaneous Piezoelectrically Actuated Hearing Aid (SPAHA): Comparison with Baha and Potential for Treating Single Sided Deafness,” Otology and Neurotology, Vol. 37(6), pp. 753-760, 2016.
• A. Kotiya, M.Bance, J. Leadbetter, J.A. Brown, R. Adamson,” Subcutaneous Piezoelectrically Actuated Hearing Aid (SPAHA): Optimisation of Piezoelectric Actuator and Effect of Biocompatible Casing on its Performance “ Otology and Neurotology, (Submitted, 2016)
• T. Landry, J. Rainsbury, R. Adamson, M. Bance, J.A. Brown, “Real-Time Imaging of the Human Middle Ear,” Hearing Research, Vol. 326, pp. 1-7, 2015
• D. Macdougall, J. Rainsbury, J.A. Brown, M. Bance, R. Adamson, “Optical Coherence Tomography Requirements for Clinical Diagnostic Middle Ear Imaging,” Journal of Biomedical Optics Vol. 20 (5), 056008, 2015
• H. Vihvelin, J. Leadbetter, M. Bance, J.A. Brown, R.adamson, “Compensating for Tissue Changes in an Ultrasonic Power Link for Implanted Medical Devices,” IEEE Transactions on Biomedical Circuits and Systems, Issue 99, ISSN 1932-4545, 2015
• J.A. Brown, S. Sundaresh, J. Leadbetter, A. Bezanson, S. Cochran, R. Adamson, “Mass-Spring Matching Layers for High Frequency Ultrasound Transducers: A New Technique Using Vacuum Deposition,” IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control, Vol.. 61, pp. 1911-1921, 2014
• A. Bezanson, R. Adamon, M. Bance, J.A. Brown, “Fabrication and Performance of a Miniaturized 64-Element High-Frequency Endoscopic Phased Array,” IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control, Vol 61, pp 33-43, 2014
• Y. Zhang, P. Garland, R. Adamson, J.A. Brown, “The Quenched State with Dominant Shear Vibration Mode Originated from Domain Reconfiguration in [001] Oriented PMN-PT Single Crystals,” Journal of Applied Physics, Vol. 115, no. 21, pp. 214101-214101-10 (Featured cover article), 2014
• H. Hanafi Alamdari, L. Posada, S. Bhatawadekar, J.A. Brown, and G. Maksym “A Resonance-Mode Piezoelectric Device for Measurement of Respiratory Mechanics,” Journal of Biomedical Science and Engineering, Vol. 6 no. 11, pp. 1062-1071, 2013
• H. Tareq Imam, J.A. Brown, R. Adamson, Y. Ma, “Active Control of 2D MEMs Micro-Mirror With Decoupling Electrodes,” Canadian Journal of Electrical and Electronic Engineering (accepted with Minor Revisions 2014)
• J.A. Brown, K. Dunphy, J. Leadbetter, R.Adamson, O. Beslin, “Fabrication and Performance of a Single-Crystal Lead Magnesium Niobate-Lead Titanate (PMN-PT) Hydrophone for Increased Sensitivity,” JASA. 134:2, pp. 1031-1038, 2013
• Z. Torbatian, R. Adamson, J.A. Brown, “Experimental Verification of Pulse Probing Technique for Phase Coherence Grating Lobe Suppression,” IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control, Vol. 60, pp. 1324-1332, 2013
• C. McKnight, M. Bance, J.A. Brown, D. Doman, R. Adamson, “Direct Measurement of the wavelength of sound waves in the Human Skull,” JASA, Vol 133:1, pp. 136-145, 2013
• Z. Torbatian, P. Garland, M. Bance, R. Adamson, J.A. Brown, “Listening to the Cochlea with High-Frequency Ultrasound,” Ultrasound in Medicine and Biology, Vol 38:12, pp. 2208-2217, 2012

Conference proceedings
• J. Woodacre, T. Landry, J.A. Brown, “Real-Time Imaging, Targeting, and Ablation of Ex-Vivo Tissue Using Handheld Histotripsy Transducer and Co-registered 64-Element High Frequency Endoscopic Phased Array,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, IUS2016-001324, 2016
• C. Samson, K. Latham, J.A. Brown, “Real-Time, Split Aperture Phased Array Beamformer with Efficient Sign Coherence Grating Lobe Suppression,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, IUS2016-001297, 2016
• K. Latham, C. Samson, A. Bezanson, J.A. Brown, “Design and Preliminary Results for a High Frequency Crossed Electrode Phased Array, Based on a Re-configurable Fresnel Lens,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, IUS2016-001387, 2016
• C. Samson, J. Leadbetter, J.A. Brown, “A 50 MHz Phased Array Beamformer Using a Novel ‘One Sample per pixel’ Variable Sampling Technique,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, 10.1109/ULTSYM.2015.0196, 2015
• K. Latham, R. Zemp, J.A. Brown, “Simulation of Fresnel based beam focusing and steering for a crossed electrode array,” Canadian Acoustics, 43 (3), ISSN 2291-1391, 2015
• D. MacDougall, T.L Landry, M.Bance, J.A. Brown, R.A. Adamson, “Optical Coherence Tomography for Clinical Otology,” Canadian Acoustics, 43 (3), ISSN 2291-1391, 2015
• A. Bezanson, J. Leadbetter, J.A. Brown “Fabrication of a High-Frequency Phased Array with Sparse Vernier Array Element Spacing for Grating Lobe Suppression,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, pp. 671-674, 2014
• K. Latham, C. Arthur, J.A. Brown, “Broad-Band, Large Delay Range, High Precision, and Variable Analog Delay Lines for a High-Frequency Phased Array Beamformer,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, pp. 2197-2200, 2014
• J.A. Brown, S. Sharma, J. Leadbetter, S. Cochran, R. Adamson, “Vacuum Deposition of Mass-Spring Matching Layers for High-Frequency Ultrasound Transducers,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, pp. 101-104, 2014
• Y. Zhang, P. Garland, R. Adamson, J.A. Brown “An induced state with dominant shear vibration mode originating from domain reconfiguration in [001]-poled PMN-PT single crystal,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, pp. 2083-2086, 2014
• J.A. Brown, J. Leadbetter, Michael Leung, A. Bezanson, R. Adamson, “A Low-Cost Open Source High Frame-Rate High-Frequency Imaging System,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, pp. 549-552, 2013
• A. Bezanson, R. Adamson, J.A. Brown “Performance of a Miniaturized 64-Element High-Frequency Phased Array Based on PMN-PT,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, , pp. 765-768, 2013
• J.A. Brown, K. Dunphy, O. Beslin, “A Single-Crystal Acoustic Hydrophone for Increased Sensitivity,” Proc. Acoustical Society of America symposium, Vol. 19, pp. 070056, 2013
• J. Leadbetter, J.A. Brown, R. Adamson, “The Design of Ultrasonic Lead Magnesium Niobate-Lead Titanate (PMN-PT) Composite Transducers for Power and Signal Delivery to an implanted hearing Aid,” Proc. Acoustical Society of America symposium, Vol. 19, pp. 030029, 2013
• H. Vihvelin, J. Leadbetter, J.A. Brown, R. Adamson, “A Modulator and Driver for High Efficiency Ultrasonic Link Providing Power and Signal to an Implanted Hearing Aid,” Proc. Acoustical Society of America symposium, Vol. 19, pp. 030028, 2013
• H. Imam, R. Adamson, J.A. Brown, Y, Ma, “Two Dimensional (2D) Micromirror with Enhanced Tilting Angle Using Active Control Methods,” Optical MEMs and Nanophotonics (OMN), International Conference on, ISSN no. 2160-5033, pp. 113-114, 2012
• P. Garland, A. Bezanson, R. Adamson, J.A. Brown, “Discovery of Microscopic Tetragonal Structure of <001> Oriented PMN-PT after Quenching from a Poled State,” Proc. IEEE International Symposium on Ultrasonics, Dresden Germany, pp. 2521-2524, 2012
• Z.Torbatian, R. Adamson, J.A. Brown, “A Virtual Point Source Pulse Probing Technique for Suppressing Grating Lobes in Large Pitch Phased Arrays,” Proc. IEEE International Symposium on Ultrasonics, pp. 1291-1294, 2012
• A. Bezanson, R. Adamson, J.A. Brown, “Fabrication of a Miniaturized 64-Element Phased Array,” Proc. IEEE International Symposium on Ultrasonics, pp. 2114-2117, 2012
• J.A. Brown, “Micro-Transducers for Ultrasonic Imaging,” Proc. Microscopical Society of Canada, Halifax, NS, 2012
• T.G. Landry, H. Ross, M.Bance, J.A. Brown, “Ex-Vivo High Imaging of the Whole Cochlea Using Ultrasound Biomicroscopy,” Proc. Microscopical Society of Canada, Halifax, NS, 2012

Published Abstracts
• K. Latham, R. Zemp, J.A. Brown, “Simulation of Fresnel based beam focusing and steering for a crossed electrode array,” Canadian Acoustics Week, Halifax, NS
• D. MacDougall, T.L Landry, M.Bance, J.A. Brown, R.A. Adamson, “Optical Coherence Tomography for Clinical Otology,” Canadian Acoustics Week, Halifax, NS
• C. Samson, J. Leadbetter, J.A. Brown, “A 50 MHz Phased Array Beamformer Using a Novel ‘One Sample per pixel’ Variable Sampling Technique,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, Taipei, Taiwan, 2015
• T.G. Landry, M. Bance, J.A. Brown, “High frequency ultrasound imaging: A new tool for cochlear implant research, training, and intraoperative assistance”. 2015 Conference on Implantable Auditory Prostheses. July 14 2015, Lake Tahoe, USA
• T. G. Landry, J.A. Brown, R.B. Adamson, M. Bance “High frequency ultrasound and optical coherence tomography: New technologies for non-invasive high resolution middle ear imaging and vibrometry”. Landry TG, Brown JA, Adamson RB, Bance ML. 7th International Symposium on Middle Ear Mechanics in Research and Otology. July 4 2015, Aalborg, Denmark
• J.A. Brown, J. Leadbetter, Michael Leung, A. Bezanson, R. Adamson, “A Low-Cost Open Source High Frame-Rate High-Frequency Imaging System,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, Prague, Czech Reb. 2013
• A. Bezanson, R. Adamson, J.A. Brown “Perfomance of a Miniaturized 64-Element High-Frequency Phased Array Based on PMN-PT,” Proc. IEEE International Symposium on Ultrasonics Ferroelectrics, and Frequency Control, Prague, Czech Reb. 2013
• M. Walker, J.A. Brown, A. Bezanson, A. West, D. Cole, G. Maksym, “A piezoelectric 3D Microtissue Oscillatory Stretching Device for Airway Cellular Mechanics and Function,” American Thoracic, Society International Conference, Philadelphia, PA, 2013
• J.A. Brown, K. Dunphy, O. Beslin, “A Single-Crystal Acoustic Hydrophone for Increased Sensitivity,” Proc. Acoustical Society of America symposium, Vol. 19, pp. 070056, 2013
• J. Leadbetter, J.A. Brown, R. Adamson, “The Design of Ultrasonic Lead Magnesium Niobate-Lead Titanate (PMN-PT) Composite Transducers for Power and Signal Delivery to an implanted hearing Aid,” Proc. Acoustical Society of America symposium, Vol. 19, pp. 030029, 2013
• H. Vihvelin, J. Leadbetter, J.A. Brown, R. Adamson, “A Modulator and Driver for High Efficiency Ultrasonic Link Providing Power and Signal to an Implanted Hearing Aid,” Proc. Acoustical Society of America symposium, Vol. 19, pp. 030028, 2013
• P. Garland, A. Bezanson, R. Adamson, J.A. Brown, “Discovery of Microscopic Tetragonal Structure of <001> Oriented PMN-PT after Quenching from a Poled State,” IEEE International Symposium on Ultrasonics, Dresden Germany, 2012
• Z.Torbatian, R. Adamson, J.A. Brown, “A Virtual Point Source Pulse Probing Technique for Suppressing Grating Lobes in Large Pitch Phased Arrays,” IEEE International Symposium on Ultrasonics, Dresden Germany, 2012
• A. Bezanson, R. Adamson, J.A. Brown, “Fabrication of a Miniaturized 64-Element Phased Array,” IEEE International Symposium on Ultrasonics, Dresden Germany, 2012
• T.G. Landry, H. Ross, M.Bance, J.A. Brown, “Ex-Vivo High Imaging of the Whole Cochlea Using Ultrasound Biomicroscopy,” Microscopical Society of Canada, Halifax, NS, 2012
• P. Garland, A. Bezanson, R. Adamson, J.A. Brown, “Alternate Crystal Structure of <001> oriented PMN-PT after Quenching from Poled state,” 2012 International Workshop on Acoustic Transduction Materials and Devices, Penn State U., State College, PA.