BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
X-WR-CALNAME:ESE Defense: Will Hamic
X-WR-TIMEZONE:Central Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260514T135230Z
UID:tag:localist.com\,2008:EventInstance_45032287680175
DTSTART:20231215T210000Z
DTEND:20231215T220000Z
DESCRIPTION:Silicon Photomultipliers for Diffuse Optical Tomography\n\nAbst
 ract: Optical neuroimaging stands as a promising potential surrogate for f
 MRI\, capable of achieving comparable imaging of brain activity near the c
 ortical surface. High-density diffuse optical tomography (HD-DOT) systems\
 , which rely on the optical properties of oxygenated and deoxygenated bloo
 d\, face trade-offs between the high performance of fiber-based systems th
 at require large opto-electronic consoles and bulky head-restricting fiber
  optics\, and wearable fiberless systems which have worse noise characteri
 stics. These differences stem from the difficulty of miniaturizing the ava
 lanche photodiodes (APDs) in fiber-based systems\, but recent advancements
  in silicon-photomultipliers (SiPMs) in the near-infrared range present an
  opportunity to combine the improved noise characteristics of fiber-based 
 APDs with the small form factor of wearable systems.\n\nThe characteristic
 s of SiPMs are modeled in the context of an HD-DOT system\, and then physi
 cally evaluated in a hybrid APD/SiPM system\, showing potential to signifi
 cantly expand the number of system channels. Complicating factors of SiPMs
 \, including nonlinearity and temperature variability are quantified and m
 anaged. A miniaturized dual source/detector module is designed and evaluat
 ed\, showing a noise floor even lower than what can be achieved with APDs\
 , while remaining small enough to support the development of a high-densit
 y (13mm-nearest neighbor spacing) wearable DOT system.
GEO:38.648794;-90.30145
LOCATION:Preston M. Green Hall\, Rodin Auditorium\, L0120
SUMMARY:ESE Defense: Will Hamic
URL;VALUE=URI:https://happenings.washu.edu/event/ese_defense_will_hamic
CATEGORIES:Seminar/Colloquia
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