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Takashi Buma
Assistant Professor
Department of Electrical and Computer Engineering   
209 Steinmetz
Union College
Schenectady, NY 12308
Phone: 518-388-6334
Email: bumat@union.edu
 
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Teaching

·        ECE 363 – Design of Electronic Circuits (F11, F12, F13)

·        BNG 386 – Biomedical Instrumentation (W12, W13, W14)

·        ECE 248 – Semiconductor Devices and Circuits (S12, S13, S14)

·        BNG/ECE 487 –Medical Imaging Systems (S12, S14)


 

Research

 

Biomedical Ultrasonics and Biophotonics Laboratory (BUBL)

 

Location: 320 Butterfield Hall

 

·         Research Members:

The BUBL has openings for several undergraduate researchers, especially for the summer of 2012. Please email me (bumat@union.edu) or swing by my office (212 Steinmetz) for more information.

·         Research Areas:

1)    Ultrasound Biomicroscopy (UBM)

UBM employs high frequency ultrasound to produce high resolution images of tissue microstructure. However, the lack of suitable sensor arrays has prevented UBM from making the leap to widespread clinical use.  We are developing UBM systems based on “optoacoustic” sensor technology. The basic idea is to detect ultrasound with optical interferometric techniques instead of conventional piezoelectric technology. This project has two major research aims: (1) develop broadband, large aperture, and highly populated optoacoustic sensor arrays (2) integrate these optoacoustic arrays into real-time UBM imaging systems. (Current funding: NSF)

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2)    Photoacoustic Microscopy (PAM)

 

PAM provides high resolution images with excellent image contrast based on optical absorption. A laser pulse illuminates tissue, where optically absorbing regions emit ultrasound by thermoelastic expansion. The detected ultrasound waves are processed to reconstruct the location of the optically absorbing regions. We are developing high repetition rate and tunable optical sources suitable for spectroscopic PAM. Pulses from a high repetition rate Q-switched Nd:YAG microchip laser are sent through an optical fiber. Four wave mixing in a photonic crystal fiber produces a supercontinuum spectrum spanning 500 to 1300 nm. Stimulated Raman scattering in a single mode fiber produces a series of Stokes wavelengths from 532 to 604 nm. PAM images taken at different excitation wavelengths can be processed to distinguish objects of different color. (Current Funding: NSF)

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3)    Optical Coherence Tomography (OCT)

 

OCT is an emerging technique for high resolution biomedical imaging. Advantages include fine spatial resolution (better than 10 um laterally and 7 um axially), portability, cost effectiveness, and miniaturization into arthroscopic devices for minimally invasive imaging. Unlike histology, OCT can produce thinly sliced cross-sectional images without physically cutting tissue. OCT typically has a penetration depth of about 1 mm in tissue, which is limited by optical scattering. We have developed a spectral domain OCT (SD-OCT) system with the eventual goal of integrating it with our PAM system. This multimodality system will combine the structural imaging capabilities of OCT with the functional imaging capabilities of PAM. (Current Funding: NSF)

 

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Publications

Link will be established soon …

Phone:  (518) 388-6334 (Office)
Email:   bumat@union.edu

Last updated 09/12/13