| Biography | |
|---|---|
 Prof. Koichi Shimizu Xidian University, China |
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| Title: Macroscopic trans-body imaging of the human body using NIR light with scattering suppression | |
| Abstract: Non-invasive visualization of the internal structure of an animal body is an essential tool in medical practice. X-ray, MRI, and ultrasound echo imaging have been widely utilized in hospitals and medical institutions. While they are useful, they possess inherent challenges such as hazardous radiation, large and expensive equipment, and relatively poor spatial resolution, respectively. Near-infrared (NIR) light offers a potential solution to these issues. Although we can detect NIR light passing through the human body, visualizing deep-seated structures has been challenging due to strong optical scattering within the body tissue. We have developed various techniques to suppress scattering. Hardware-oriented techniques involve selectively extracting near-axis scattered light that propagates along the optical axis of the collimated incident light beam. Another technique involves applying the time-reversal principle of phase conjugate light. Software-oriented techniques include deconvolution using the point spread function (PSF). Additionally, the application of deep learning principles to suppress scattering and estimate absorber depth is another technique we have explored. Using these developed techniques, we have made 3D visualization of the internal structure of animal bodies possible. This advancement paves the way for a new modality with distinct features compared to conventional techniques in medical imaging. | |
| Biography: Koichi Shimizu received M.S. and Ph.D. degrees, from University of Washington (UW), Seattle, USA in 1976 and 1979, respectively. He was a Research Associate in University of Washington in 1974-79. He was an Assistant Professor, an Associate Professor, and a Professor in Hokkaido University, Sapporo, Japan in 1979-2016. He was a Professor in Waseda University in 2016-2021. He is currently a Professor of Xidian University, China, an Invited Research Professor of Waseda University, Japan, and a Professor Emeritus of Hokkaido University, Japan. He has been engaged in the studies of biomedical engineering including those of wave propagation in biological media, optical imaging and measurement, biotelemetry, and biological effects of electromagnetic field. He served as an associate editor of IEEE Trans. ITB in 1999–2007. He has been a Fellow of the Electromagnetics Academy, and an editorial board member of Scientific Reports, Nature. | |
