<html>
<body>
Dear Colleagues,<br><br>
The G.R. Harrison Spectroscopy Laboratory and the Department of
Electrical Engineering and Computer Science would like to invite you to
the next seminar in our series on Modern Optics and
Spectroscopy.<br><br>
<br>
Date &
Time:<x-tab> </x-tab><x-tab> </x-tab>Tuesday,
November 23, 12 noon - 1 PM<br>
Location:<x-tab> </x-tab><x-tab> </x-tab>Grier
Room (34-401)<br>
Speaker:<x-tab> </x-tab><x-tab> </x-tab><b>Lihong
V. Wang,</b> Texas A&M University<br>
Title:
<x-tab> </x-tab><x-tab> </x-tab><i>Photonic
imaging in biological tissue<br><br>
</i>Refreshments will be served following the talk.<br><br>
Abstract:<br>
<b>Lihong V. Wang,</b> Texas A&M University<br>
<i>Photonic imaging in biological tissue<br>
</i>We develop novel biophotonic tomography for early-cancer detection
and functional imaging by physically combining non-ionizing
electromagnetic and ultrasonic waves. Unlike ionizing x-ray
radiation, non-ionizing electromagnetic waves, such as optical and radio
waves, pose no health hazard and, at the same time, reveal new contrast
mechanisms. Unfortunately, electromagnetic waves in the
non-ionizing spectral range do not penetrate biological tissue in
straight paths. Consequently, high-resolution tomography based on
non-ionizing electromagnetic waves alone is limited to superficial
imaging within about one transport mean free path (~1 mm) into biological
tissues. Ultrasonic imaging, on the contrary, furnishes good image
resolution but has strong speckle artifacts as well as poor contrast in
early-stage tumors. We have developed ultrasound-mediated imaging
modalities by combining electromagnetic and ultrasonic waves
synergistically to overcome the above problems. The hybrid
modalities yield speckle-free images of high electromagnetic contrast at
high ultrasonic resolution in relatively large volumes of biological
tissues.<br>
<x-sigsep><p></x-sigsep>
Vinnie Russo * vrusso@mit.edu * Office Manager<br>
MIT; G.R. Harrison Spectroscopy Laboratory<br>
77 Mass. Ave., 6-014 * Cambridge, MA 02139<br>
(v) 617-253-9774 * (f) 617-253-4513</body>
</html>