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SUMMARY:Functional Imaging via Diffuse Correlation Spectroscopy and Speckl
 e-Based Methods  - Nisan Ozana
DTSTART:20230505T130000Z
DTEND:20230505T140000Z
UID:TALK200476@talks.cam.ac.uk
CONTACT:Kirsty Shepherd
DESCRIPTION:Functional neuroimaging plays a key role in understanding the 
 neural circuitry and fundamental mechanisms of the brain. Advancements in 
 diffuse optics\, Light Detection and Ranging (LiDAR) and astronomy imaging
  systems are fostering the development of new instruments and techniques f
 or non-invasive real-time optical and acoustical neuroimaging. Recently th
 e advantage of diffuse optical methods for functional and clinical neuroim
 aging was shown via the following methods. The first method is based on su
 perconducting nanowire single photon detectors (SNSPDs) and illumination a
 t 1064nm\, which offer superior photon efficiency\, timing resolution\, da
 rk count rate\, broad wavelength sensitivity\, and low after-pulsing proba
 bility. Initial human results show a 16- fold improvement in SNR and 20% i
 mprovement in depth sensitivity. The second approach\, based on time-domai
 n system allow rejection of short pathlength photons that travel mostly in
  extracerebral layers i.e. scalp and skull and allow selection of longer p
 athlength photons that travel in the deeper brain layer. The last method i
 s based on lowcost detection using multi-speckle sensing which enables hig
 h speed (>50Hz) and high SNR measurements of cerebral blood flow.
LOCATION:Electrical Engineering\, Department of Engineering - EE Seminar R
 oom\, 9 JJ Thomson Avenue\, Cambridge\, CB3 0FA
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