Talks & Lectures
9 Oct 2019
McLean 510

Medical Imaging with ‘Scrambled’ Low-Energy Photons

Sponsored by BME

Photo of Qianqian Fang, Ph.D.

By Qianqian Fang, Ph.D.
Assistant Professor of Bioengineering,
Affiliated Faculty in Electrical and Computer Engineering,
Northeastern University


For centuries in medical imaging, we have been relying on "ballistic" photons, as with x-ray and CT, to create images from "opaque" objects. In recent decades, using "scrambled", or heavily scattered, photons as alternative approaches became increasingly attractive due to its potential of being non-ionizing, functional, portable, and low-cost. This has resulted in a list of emerging biophotonic techniques, including diffuse optical tomography (DOT) and functional nearinfrared spectroscopy (fNIRS). In this talk, we will show you the key benefits using such diffusive photons in the context of cancer imaging, brain functional studies, and low-light phototherapy – also known as photobiomodulation. We will also discuss the major challenges in making these techniques successful. Particularly, we will talk about two separate, but connected, challenges: (1) how to properly simulate “scrambled” photons and their interactions with complex tissues, and, (2) how to use measurements of scrambled photons to recover deeply embedded structures.


Dr. Qianqian Fang is currently an Assistant Professor in the Bioengineering Department at Northeastern University. He received his PhD degree from Dartmouth College in 2005. He then joined Massachusetts General Hospital as a postdoctoral fellow and became an Instructor of Radiology in 2009 and Assistant Professor of Radiology in 2012, before he joined Northeastern University in 2015. His research interests include translational medical imaging systems, low-cost point-of-care devices for resource-limited regions, and highperformance computing tools to facilitate the development of nextgeneration imaging platforms. His lab was recently awarded an NIHR01 for developing a next generation fNIRS system. The system is an ultra-portable, fiberless optical brain imaging platform for monitoring brain activity in natural environments.


For follow-up information to connect with speaker, contact Dr. Raviraj Nataraj at [email protected]

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