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Which statement seems more true? I have a brain. I am a brain.
—Douglas Hofstadter

Optical Topography

Friday, 30 March 2007 08:21
Optical topography was featured on The Scientist Jan-05 issue as "Brain imaging moves beyond MRI". The thought of using optical topography to get another perspective of what is happening in the brain during normal brain activity is exciting.

MRI has been a wonderful tool to help us understand the innerworking of the physical body. fMRI went further to allow for functional mapping over 3d structure.

Optical topography is non-invasive and portable. Instead of sitting in large MR/CT machines, the patient wears a head cap containing many optical sources and detectors. These source-detector pairs allow for calculations to determine the scattering and absorption through various depths of tissue.


Web references
Principle of Optical Topography
UCL Optical Topography System
Model train controlled via brain-machine interface
Hitachi Develops Mind Reading System
High-density diffuse optical tomography helps scan infant brains
Detection of stroke events using diffuse optical tomography - US Patent 6516214
The Center for Functional Neuroimaging Technologies
Diffuse Optical Tomography animation


Near infrared spectroscopy - Wikipedia, the free encyclopedia


Reflectance Transformation Imaging (RTI) || bonus info.

Reflectance Transformation Imaging (RTI) technology which captures an object or person under a variety of lighting conditions then combine it into a single, interactive photo. Inside the box is a concave surface studded with 81 LED flashes. A custom microcontroller inside triggers each flash in sequence and a camera mounted at the rear captures an image at each stop.

Cultural Heritage Imaging | Reflectance Transformation Imaging (RTI)
Relightable Dome


Ultrasound visible light

Deep-tissue focal fluorescence imaging with digitally time-reversed ultrasound-encoded light : Nature Communications : Nature Publishing Group
Ultrasound puts a new twist on light - physicsworld.com
Light Modulation via Ultrasound
IEEE Xplore Abstract - Combined ultrasound and near infrared diffused light imaging in a test object

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Last Updated on Sunday, 15 February 2015 03:35