Real-time monitoring system of RF near-field distribution images on the basis of 64-channel parallel electro-optic data acquisition. - Kiyotaka Sasagawa; Masahiro Tsuchiya (IEICE Electron. Express, 2005)

CMOS-based flexible multi-site retinal stimulator toward retinal prosthesis technology. - Takashi Tokuda; Yoichi Takeuchi; Toshihiko Noda; Kiyotaka Sasagawa; Jun Ohta (CICC, 2009)

Polarization-analyzing CMOS Image Sensor using Monolithically Embedded Polarizer for Microchemistry Systems. - Takashi Tokuda; Hirofumi Yamada; Kiyotaka Sasagawa; Jun Ohta (ISCAS, 2009)

Implantable CMOS Biomedical Devices. - Jun Ohta; Takashi Tokuda; Kiyotaka Sasagawa; Toshihiko Noda (Sensors, 2009)

Polarization-Analyzing CMOS Image Sensor With Monolithically Embedded Polarizer for Microchemistry Systems. - Takashi Tokuda; Hirofumi Yamada; Kiyotaka Sasagawa; Jun Ohta (IEEE Trans. Biomed. Circuits Syst., 2009)

Development and in vivo Demonstration of CMOS-Based Multichip Retinal Stimulator With Simultaneous Multisite Stimulation Capability. - Takashi Tokuda; Yoichi Takeuchi; Yuki Sagawa; Toshihiko Noda; Kiyotaka Sasagawa; Kentaro Nishida; Takashi Fujikado; Jun Ohta (IEEE Trans. Biomed. Circuits Syst., 2010)

Wireless intra-brain communication for image transmission through mouse brain. - Kiyotaka Sasagawa; Takashi Matsuda; Peter Davis; Bing Zhang 002; Keren Li; Takuma Kobayashi; Toshihiko Noda; Takashi Tokuda; Jun Ohta (EMBC, 2011)

CMOS-based smart-electrode-type retinal stimulator with bullet-shaped bulk Pt electrodes. - Takashi Tokuda; Takasuke Ito; Takuya Kitao; Toshihiko Noda; Kiyotaka Sasagawa; Yasuo Terasawa; Hiroyuki Tashiro; Hironari Kanda; Takashi Fujikado; Jun Ohta (EMBC, 2011)

Fabrication of a flexible neural interface device with CMOS-based smart electrodes. - Toshihiko Noda; Takuya Kitao; Takasuke Ito; Kiyotaka Sasagawa; Takashi Tokuda; Yasuo Terasawa; Hiroyuki Tashiro; Hiroyuki Kanda; Takashi Fujikado; Jun Ohta (VLSI-SoC, 2011)

Micro CMOS image sensor for multi-area imaging. - Kiyotaka Sasagawa; Hiroyuki Masuda; Ayato Tagawa; Takuma Kobayashi; Toshihiko Noda; Takashi Tokuda; Jun Ohta (VLSI-SoC, 2011)

CMOS Imaging Devices for Biomedical Applications. - Jun Ohta; Takuma Kobayashi; Toshihiko Noda; Kiyotaka Sasagawa; Takashi Tokuda (IEICE Trans. Commun., 2011)

A micro imaging device for measuring neural actvities in the mouse deep brain with minimal invasiveness. - Jun Ohta; Chikara Kitsumoto; Toshihiko Noda; Kiyotaka Sasagawa; Takashi Tokuda; Mayumi Motoyama; Yasumi Ohta; Takuma Kobayashi; Yasuaki Ishikawa; Sadao Shiosaka (BioCAS, 2012)

Image signal transmission through brain by an implantable micro-imager. - Kiyotaka Sasagawa; Shogo Yokota; Chikara Kitsumoto; Takashi Matsuda; Peter Davis; Bing Zhang 002; Keren Li; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2012)

Baseband signal transmission experiment for intra-brain communication with implantable image sensor. - Kiyotaka Sasagawa; Shogo Yokota; Takashi Matsuda; Peter Davis; Bing Zhang 002; Keren Li; Takuma Kobayashi; Toshihiko Noda; Takashi Tokuda; Jun Ohta (EMBC, 2012)

A CMOS-based on-chip neural interface device equipped with integrated LED array for optogenetics. - Takashi Tokuda; Tomoaki Miyatani; Yasuyo Maezawa; Takuma Kobayashi; Toshihiko Noda; Kiyotaka Sasagawa; Jun Ohta (EMBC, 2012)

Proposal and evaluation of intra-body sensing via sheet medium. - Takashi Matsuda; Bing Zhang 002; Keren Li; Kiyotaka Sasagawa; Jun Ohta; Peter Davis (INSS, 2012)

Implantable image sensor based on intra-brain image transmission. - Kiyotaka Sasagawa; Yoshiaki Ishii; Shogo Yokota; Takashi Matsuda; Peter Davis; Bing Zhang 002; Keren Li; Toshihiko Noda; Takashi Tokuda; Jun Ohta (EMBC, 2013)

An in vitro demonstration of CMOS-based optoelectronic neural interface device for optogenetics. - Takashi Tokuda; S. Nakajima; Y. Maezawa; Toshihiko Noda; Kiyotaka Sasagawa; Yasuyuki Ishikawa; Sadao Shiosaka; Jun Ohta (EMBC, 2013)

A CMOS microchip-based retinal prosthetic device for large numbers of stimulation in wide area. - Jun Ohta; Toshihiko Noda; Kiyotaka Sasagawa; Takashi Tokuda; Yasuo Terasawa; Hironari Kanda; Takashi Fujikado (ISCAS, 2013)

Demonstration of implantable CMOS image sensors for functional brain imaging. - Kiyotaka Sasagawa; Yoshinori Sunaga; Makito Haruta; Takahiro Yamaguchi; Hironari Takehara; Hiroaki Takehara; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2014)

An implantable image sensor with self-reset function for brain imaging. - Kiyotaka Sasagawa; Takahiro Yamaguchi; Makito Haruta; Yoshinori Sunaga; Hironari Takehara; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2014)

An implantable green fluorescence imaging device using absorption filters with high excitation light rejection ratio. - Yoshinori Sunaga; Makito Haruta; Takahiro Yamaguchi; Mayumi Motoyama; Yasumi Ohta; Hiroaki Takehara; Toshihiko Noda; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta (BioCAS, 2014)

High coupling efficiency contact imaging system having micro light pipe array for a digital enzyme-linked immunosorbent assay. - Hironari Takehara; Mizuki Nagasaki; Kiyotaka Sasagawa; Hiroaki Takehara; Toshihiko Noda; Takashi Tokuda; Hiroyuki Noji; Jun Ohta (BioCAS, 2015)

CMOS-based on-chip neural interface devices for optogenetics. - Takashi Tokuda; Hiroaki Takehara; Toshihiko Noda; Kiyotaka Sasagawa; Jun Ohta (BioCAS, 2015)

Fabrication and functional demonstration of a smart electrode with a built-in CMOS microchip for neural stimulation of a retinal prosthesis. - Toshihiko Noda; Takumi Fujisawa; Ryohei Kawasaki; Hiroyuki Tashiro; Hiroaki Takehara; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta (EMBC, 2015)

Hemodynamic imaging using an implantable self-reset image sensor. - Kiyotaka Sasagawa; Takahiro Yamaguchi; Makito Haruta; Yasumi Ohta; Hiroaki Takehara; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2016)

Compact lensless digital counting system for fluorescent micro-reaction-chamber array. - Hironari Takehara; Yuta Nakamoto; Kiyotaka Sasagawa; Hiroaki Takehara; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2016)

CMOS-based opto-electronic neural interface devices for optogenetics. - Takashi Tokuda; Satoki Noguchi; Satoru Iwasaki; Hiroaki Takehara; Toshihiko Noda; Kiyotaka Sasagawa; Jun Ohta (EMBC, 2016)

On-chip fluorescence detection system with high-density microchamber array based on CMOS image sensor. - Jun Ohta; Hironari Takehara; Kiyotaka Sasagawa; Hiroaki Takehara; Toshihiko Noda; Takashi Tokuda (ISCAS, 2016)

Neural stimulators for retinal prosthesis embedded with CMOS microchips. - Toshihiko Noda; Hiroaki Takehara; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta (MWSCAS, 2016)

In Vitro Long-Term Performance Evaluation and Improvement in the Response Time of CMOS-Based Implantable Glucose Sensors. - Takashi Tokuda; Toshikazu Kawamura; Keita Masuda; Tomohiro Hirai; Hironari Takehara; Yasumi Ohta; Mayumi Motoyama; Hiroaki Takehara; Toshihiko Noda; Kiyotaka Sasagawa; Jun Ohta; Teru Okitsu; et al. (IEEE Des. Test, 2016)

CMOS-Based Optoelectronic On-Chip Neural Interface Device. - Takashi Tokuda; Hiroaki Takehara; Toshihiko Noda; Kiyotaka Sasagawa; Jun Ohta (IEICE Trans. Electron., 2016)

Fabrication and in vivo demonstration of microchip-embedded smart electrode device for neural stimulation in retinal prosthesis. - Toshihiko Noda; Shinya Nishimura; Yukari Nakano; Yasuo Terasawa; Makito Haruta; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta (BioCAS, 2017)

Fluorescence imaging device with an ultra-thin micro-LED. - Kiyotaka Sasagawa; Makito Haruta; Koki Fujimoto; Yasumi Ohta; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2017)

Parylene-based flexible imaging device for physiological measurement of rodent brain. - Takahiro Yamaguchi; Hajime Hayami; Yoshinori Sunaga; Makito Haruta; Toshihiko Noda; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta (IEEE SENSORS, 2017)

CMOS-based opto-electric neural interface devices for optogenetics. - Takashi Tokuda; Makito Haruta; Toshihiko Noda; Kiyotaka Sasagawa; Jun Ohta (MWSCAS, 2017)

A high-precision CMOS biophotometry sensor with noise cancellation and two-step A/D conversion. - Mehdi Noormohammadi Khiarak; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta; Sylvain Martel; Yves De Koninck; Benoit Gosselin (NEWCAS, 2017)

Stimulator Design of Retinal Prosthesis. - Jun Ohta; Toshihiko Noda; Kenzo Shodo; Yasuo Terasawa; Makito Haruta; Kiyotaka Sasagawa; Takashi Tokuda (IEICE Trans. Electron., 2017)

Implantable Microimaging Device for Observing Brain Activities of Rodents. - Jun Ohta; Yasumi Ohta; Hiroaki Takehara; Toshihiko Noda; Kiyotaka Sasagawa; Takashi Tokuda; Makito Haruta; Takuma Kobayashi; Yasemin M. Akay; Metin Akay (Proc. IEEE, 2017)

Battery-Free. Sticker-Like, Device for Health Monitoring, Operated by Optical Power Transfer. - Wuthibenjaphonchai Nattakarn; Makito Haruta; Toshihiko Noda; Kiyotaka Sasagawa; Takashi Tokuda; Mohamad Sawan; Sandro Carrara; Jun Ohta (BioCAS, 2018)

Excitation and Emission Filters for Implantable Fluorescence Imaging Devices by Laser Lift-Off Process. - Kiyotaka Sasagawa; Yasumi Ohta; Makito Haruta; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2018)

Live Demonstration: An Energy-Efficient CMOS Biophotometry Sensor Interface. - Mehdi Noormohammadi Khiarak; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta; Sylvain Martel; Yves De Koninck; Benoit Gosselin (ISCAS, 2018)

An Energy-Efficient CMOS Biophotometry Sensor With Incremental DT-∑Δ ADC Conversion. - Mehdi Noormohammadi Khiarak; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta; Sylvain Martel; Yves De Koninck; Benoit Gosselin (ISCAS, 2018)

Live Demonstration: IoT micronode with optical ID transmission capability operated by optical energy harvesting. - Takashi Tokuda; Wuthibenjaphonchai Nattakarn; Takaaki Ishizu; Makito Haruta; Toshihiko Noda; Kiyotaka Sasagawa; Jun Ohta; Mohamad Sawan (ISCAS, 2018)

A 17-bit 104-dB-DR High-Precision Low-Power CMOS Fluorescence Biosensor With Extended Counting ADC and Noise Cancellation. - Mehdi Noormohammadi Khiarak; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta; Sylvain Martel; Yves De Koninck; Benoit Gosselin (NEWCAS, 2018)

Compact Lensless Fluorescence Counting System for Single Molecular Assay. - Hironari Takehara; Yuta Nakamoto; Narihito Ikeda; Kiyotaka Sasagawa; Makito Haruta; Toshihiko Noda; Takashi Tokuda; Jun Ohta (IEEE Trans. Biomed. Circuits Syst., 2018)

Live Demonstration: Lensless Highly Sensitive Fluorescence Imaging. - Kiyotaka Sasagawa; Kenji Sugie; Yasumi Ohta; Mamiko Kawahara; Makito Haruta; Jun Ohta (BioCAS, 2019)

Multispectral Near-infrared Imaging Technologies for Nonmydriatic Fundus Camera. - Hironari Takehara; Hirofumi Sumi; Wang Ze; Takahiro Kondo; Makito Haruta; Kiyotaka Sasagawa; Jun Ohta (BioCAS, 2019)

A Thin Composite Emission Filter and Fiber Coupled Laser Excitation for Implantable Fluorescence Imager Application. - Erus Rustami; Kiyotaka Sasagawa; Yasumi Ohta; Makito Haruta; Toshihiko Noda; Takashi Tokuda; Jun Ohta (ISCAS, 2019)

Miniaturized CMOS imaging device for implantable applications. - Kiyotaka Sasagawa; Makito Haruta; Yasumi Ohta; Hironari Takehara; Jun Ohta (VLSI-DAT, 2020)

Needle-Type Imager Sensor With Band-Pass Composite Emission Filter and Parallel Fiber-Coupled Laser Excitation. - Erus Rustami; Kiyotaka Sasagawa; Kenji Sugie; Yasumi Ohta; Makito Haruta; Toshihiko Noda; Takashi Tokuda; Jun Ohta (IEEE Trans. Circuits Syst. I Fundam. Theory Appl., 2020)

Implantable CMOS image sensor with a neural amplifier for simultaneous recording of optical and electrophysiological signals. - Kenji Sugie; Kiyotaka Sasagawa; Yasumi Ohta; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (BioCAS, 2021)

Micro-LED Array-Based Photo-Stimulation Devices for Optogenetics in Rat and Macaque Monkey Brains. - Yasumi Ohta; Mark Christian Guinto; Takashi Tokuda; Mamiko Kawahara; Makito Haruta; Hironari Takehara; Hiroyuki Tashiro; Kiyotaka Sasagawa; Hirotaka Onoe; Reona Yamaguchi; Yoshinori Koshimizu; Kaoru Isa; et al. (IEEE Access, 2021)

Development of Compact Readout Device for Neural Observation System using Fluorescence Imaging and Fast-scan Cyclic Voltammetry. - Ronnakorn Siwadamrongpong; Nicha Sato; Kenji Sugie; Yasumi Ohta; Makito Haruta; Hironari Takehara; Hiroyuki Tashiro; Kiyotaka Sasagawa; Jun Ohta (EMBC, 2022)

Mouse Brain Imaging Using a Self-Reset CMOS Image Sensor over 70-dB SNR. - Kiyotaka Sasagawa; Pakpuwadon Thanet; Mark Christian Guinto; Yasumi Ohta; Makito Haruta; Hironari Takehara; Hiroyuki Tashiro; Jun Ohta (MWSCAS, 2022)

Clear Fundus Images Through High-Speed Tracking Using Glare-Free IR Color Technology. - Motoshi Sobue; Hirokazu Takata; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Kiyotaka Sasagawa; Ryo Kawasaki; Jun Ohta (J. Robotics Mechatronics, 2022)

Front-light Structure for a Lensless Fluorescence Imaging Device with a Hybrid Emission Filter. - Kiyotaka Sasagawa; Yuki Ito; Daniel Schaeffer; Yoshinori Sunaga; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (BioCAS, 2023)

Thin and Scalable Hybrid Emission Filter via Plasma Etching for Low-Invasive Fluorescence Detection. - Erus Rustami; Kiyotaka Sasagawa; Kenji Sugie; Yasumi Ohta; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (Sensors, 2023)

Charge-Pump-Circuit Implementation for Increasing Sink Current in Low-Volage CMOS Retinal-Prosthesis Chips. - Wisaroot Sriitsaranusorn; Yuki Nakanishi; Takaya Hattori; Kuang-Chih Tso; Kenzo Shodo; Hironari Takehara; Yoshinori Sunaga; Makito Haruta; Hiroyuki Tashiro; Yasuo Terasawa; Jun Ohta; Kiyotaka Sasagawa (APCCAS, 2024)

Effects of Excitation Light Polarization with FrontLight Structure on Lensless Fluorescence Imaging. - Arphorn Promking; Kiyotaka Sasagawa; Yoshinori Sunaga; Yasumi Ohta; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (BioCAS, 2024)

Exposure Time Control Method for Higher Intermediate Frequency in Optical Heterodyne Imaging and Its Application to Electric-Field Imaging Based on Electro-Optic Effect. - Kiyotaka Sasagawa; Ryoma Okada; Yoshihiro Akamatsu; Maya Mizuno; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (Sensors, 2024)

Millimeter-Wave Band Electro-Optical Imaging System Using Polarization CMOS Image Sensor and Amplified Optical Local Oscillator Source. - Ryoma Okada; Maya Mizuno; Tomoaki Nagaoka; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta; Kiyotaka Sasagawa (Sensors, 2024)

Microwave electro-optical imaging system using a frequency tracking optical local oscillator source with a polarization CMOS image sensor. - Ryoma Okada; Maya Mizuno; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta; Kiyotaka Sasagawa (IEICE Electron. Express, 2025)