Takashi Buma Associate Professor Department of Electrical, Computer, and Biomedical Engineering 209 Steinmetz Union College Schenectady, NY 12308 Phone: 518-388-6334 Email: bumat@union.edu |
Teaching · ECE 248 - Semiconductor Devices and Circuits · ECE 343 - Electromagnetic Engineering (Spring 2021) · ECE 363 - Design of Electronic Circuits (Fall 2021) (see Nexus) · BME/ECE 386 - Biomedical Instrumentation (Winter 2022) · BME/ECE 487 - Medical Imaging Systems (Fall 2021) (see Nexus) |
Research
· Research Areas: 1) Photoacoustic Microscopy (PAM)
Our main research area is developing new lasers for photoacoustic microscopy (PAM), a biomedical imaging technique that combines laser excitation and ultrasonic detection. PAM relies on optical absorption that is natural to tissue, so it can produce label-free high contrast images. A critical component of a PAM system is a pulsed laser with an adjustable wavelength. Our current goal is to develop affordable, compact, and rapidly tunable pulsed lasers for PAM. In particular, we have been exploring techniques based on nonlinear fiber optics.
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2) Optoacoustic Sensors Another BUBL research area is developing optoacoustic sensors for high frequency ultrasound. Very high resolution ultrasound imaging, as well as photoacoustic microscopy, require detecting high frequency acoustic waves. Optoacoustic sensors, which use light to detect ultrasound, can potentially provide much better performance than conventional piezoelectric sensors. We are particularly interested in miniature optical resonators such as thin-film Fabry-Perot interferometers and whispering gallery mode microresonators.
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3) Optical Coherence Tomography (OCT) We also do some research in optical coherence tomography (OCT), focusing more on applications rather than instrumentation development. OCT is basically an optical version of ultrasound imaging, where it displays cross-sectional images of tissue at video frame rates. OCT can only image over a small region and is limited to a depth of about 1 mm in tissue. However, its 3-D imaging capability is particularly valuable for a variety of biomedical applications.
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· BUBL Publications Journal Papers (* denotes Union students) [1] T. Buma, N. C. Conley*, and S.-W. Choi*, “Multispectral photoacoustic microscopy of lipids using a pulsed supercontinuum laser,” Biomed. Opt. Express, Vol. 9(1), 276-288 (2018). [2] T. Buma, J. L. Farland*, and M. R. Ferrari*, “Near-infrared multispectral photoacoustic microscopy using a graded-index fiber amplifier,” Photoacoustics, Vol. 4(3), 83-90 (2016). [3] T. Buma, B. C. Wilkinson*, and T. C. Sheehan*, “Near-infrared spectroscopic photoacoustic microscopy using a multi-color fiber laser source,” Biomed. Opt. Express, Vol. 6(8), 2819-2829 (2015). [4] I. Pelivanov, T. Buma, J. Xia, C.-W. Wei, M. O’Donnell, “NDT of fiber-reinforced composites with a new fiber-optic pump-probe laser-ultrasound system”, Photoacoustics, Vol. 2, pp. 63-74 (2014). [5] I. Pelivanov, T. Buma, J. Xia, C.-W. Wei, M. O’Donnell, “A new fiber-optic non-contact compact laser-ultrasound scanner for fast non-destructive testing and evaluation of aircraft composites”, J. Appl. Phys., Vol. 115 (11), 113105 (2014). [6] Ashok Ramasubramanian, Quynh B. Chu LaGraff, Takashi Buma, Kevin T. Chico*, Meagan E. Carnes*, Kyra R. Burnett*, Sarah A. Bradner*, and Shaun S. Gordon*. "On the role of intrinsic and extrinsic forces in early cardiac s-looping." Developmental Dynamics (2013). Conference Papers (* denotes Union students) [1] N. C. Conley*, S. Choi*, and T. Buma, “Photoacoustic microscopy of lipids at 1.2 and 1.7 mm using a pulsed supercontinuum laser,” IEEE International Ultrasonics Symposium,” Washington D.C., USA (2017). [Oral] [2] S. Choi* and T. Buma, “Injection-seeded Raman fiber amplifier for photoacoustic microscopy of lipids,” IEEE International Ultrasonics Symposium,” Tours, France (2016). [Oral] [3] M. R. Ferrari*, J. L. Farland*, and T. Buma, “Photoacoustic microscopy using four-wave mixing in a multimode fiber,” IEEE International Ultrasonics Symposium, Taipei, Taiwan, pp. 1 – 4 (2015). [Oral] [4] J. L. Farland*, M. R. Ferrari*, and T. Buma, “Photoacoustic microscopy of lipids using a graded-index fiber amplifier,” IEEE International Ultrasonics Symposium, Taipei, Taiwan, pp. 1 – 4 (2015). [Oral] [5] B. C. Wilkinson*, T. C. Sheehan*, and T. Buma, “Spectroscopic photoacoustic microscopy in the 1064-1300 nm range using a pulsed multi-color source based on stimulated Raman scattering,” IEEE International Ultrasonics Symposium, Chicago, USA, Sep. 2014. [Oral] [6] K. J. Hammer*, and T. Buma, “Microsphere resonator for optoacoustic detection of high frequency ultrasound,” IEEE International Ultrasonics Symposium, Chicago, USA, Sep. 2014. [Oral] [7] A. K. Loya*, J. P. Dumas*, and T. Buma, “Photoacoustic microscopy with a tunable source based on a large mode-area photonic crystal fiber,” IEEE International Ultrasonics Symposium, Dresden, Germany, Oct. 2012. [Oral] Conference Abstracts (* denotes Union students) [1] B. C. Wilkinson*, T. C. Sheehan*, and T. Buma, “Near-infrared spectroscopic photoacoustic microscopy using a pulsed multi-color source based on stimulated Raman scattering,” Biomedical Engineering Society (BMES) Annual Meeting, San Antonio, TX (2014). [Poster] [2] T. C. Sheehan*, B. C. Wilkinson*, and T. Buma, “Spectroscopic photoacoustic microscopy with a multi-color pulsed laser using a graded-index multimode optical fiber,” Biomedical Engineering Society (BMES) Annual Meeting, San Antonio, TX (2014). [Poster] [3] K. J. Hammer*, and T. Buma, “High frequency optoacoustic sensor using a microsphere resonator,” Biomedical Engineering Society (BMES) Annual Meeting, San Antonio, TX (2014). [Poster] [4] A. K. Loya*, J. P. Dumas*, and T. Buma, “Dual-wavelength photoacoustic microscopy at 532 and 1064 nm with a cost-effective microchip laser,” Biomedical Engineering Society (BMES) Annual Meeting, Seattle, WA (2013). [Poster] [5] J. P. Dumas*, A. K. Loya*, and T. Buma, “High speed dual-wavelength photoacoustic microscopy with an acousto-optic tunable filter,” Biomedical Engineering Society (BMES) Annual Meeting, Seattle, WA (2013). [Poster] [6] A. K. Loya*, J. P. Dumas*, D. Koeplinger, and T. Buma, “Photoacoustic microscopy with a multi-color laser source based on stimulated Raman scattering and four-wave mixing,” Biomedical Engineering Society (BMES) Annual Meeting, Atlanta, GA (2012). [Poster] · Current and Previous Research Members:
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Phone: (518) 388-6334 (Office)
Email: bumat@union.edu
Last updated 12/19/17 |
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