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CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:Imaging through optical fibres - Milana Gataric (U
 niversity of Cambridge)
DTSTART;TZID=Europe/London:20190621T133000
DTEND;TZID=Europe/London:20190621T142000
UID:TALK126322AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/126322
DESCRIPTION:In this talk\, I&#39\;ll present some recent resul
 ts on reconstruction of optical vector-fields usin
 g measurements acquired by an optical fibre charac
 terised by a non-unitary integral transform with a
 n unknown spatially-variant kernel. A new imaging 
 framework will be introduced\, which through regul
 arisation is able to recover an optical vector-fie
 ld with respect to an arbitrary representation sys
 tem potentially different from the one used for fi
 bre calibration. In particular\, this enables the 
 recovery of an optical vector-field with respect t
 o a Fourier basis\, which is shown to yield indica
 tive features of increased scattering associated w
 ith tissue abnormalities. The effectiveness of thi
 s framework is demonstrated using biological tissu
 e samples in an experimental setting where measure
 ments are acquired by a fibre endoscope\, and it i
 s observed that indeed the recovered Fourier coeff
 icients are useful in distinguishing healthy tissu
 es from lesions in early stages of cancer. If time
  permits\, I&#39\;ll also briefly present a new me
 thod that enables recovery of non-unitary fibre tr
 ansmission matrices necessary for minimally invasi
 ve optical imaging in inaccessible areas of the bo
 dy.
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:INI IT
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