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Functional activations

Movie showing the functional activations from smelling in the human brain.

Constructed with brain activations from the Brede Database, rendering in the MRIcron program and converted to a movie with ffmpeg.

Finn Årup Nielsen, 2008, 2011.

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Active surface for the head

[1.1Mb-MPEG1] Movie showing the adaptation of a closed surface to the skull of an MRI image. The surface consists of 3200 vertices that makes almost 6400 triangles. The fitting procedure is based on the minimization of an energy function that, for this example, consists of a smoothing term and an attraction term.

Similar movies and a VRML file are available from the ``Geo'' project page.
Mattias Ohlsson, Peter Toft, 1997 April.

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Brain activation with an fMRI scanner

[284kb-MPEG1] Movie showing a coronal slice through the visual cortex. The subject is looking at a periodic visual stimulus and the brain activity is monitored with a functional magnetic resonance imaging (fMRI) brain scanner. During activation (symbolized by the red blob in high state), the subject is presented an alternating checker-board pattern. In the other state, the subject is at rest. The data is acquired using a 4 Tesla fMRI scanner (Karl Friston, Peter Jezzard et. al).
Ulrik Kjems, Peter Philipsen, 1997 January

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PET brain scan

[0.5Mb-MPEG1] Movie showing 2-dimensional slices of reconstructed positron emission tomography (PET) images. The movie frames show the horizontally sliced head sections of brain activity going upwards and then downwards. The movie is generated from a reconstruction (filtered backprojection) of projections [1].
  1. Peter Toft, The Radon Transform - Theory and Implementation, Ph.D. thesis. Department of Mathematical Modelling, Technical University of Denmark, June 1996. 326 pages.
Peter Toft, 1995

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PET reconstruction

[2.8Mb-MPEG1] Movie showing the reconstruction process. The movie initially shows a 2D sinogram (projections), which is high pass filtered for all angles. Then the movie changes, and it is shown how the sinogram is backprojected into the image domain. The movie is generated found from a reconstruction (filtered backprojection) of projections [1].
  1. Peter Toft, The Radon Transform - Theory and Implementation, Ph.D. thesis. Department of Mathematical Modelling, Technical University of Denmark, June 1996. 326 pages.
Peter Toft, 1996

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Tour around surface in PET image

[2.5Mb-MPEG1] Movie showing a tour around stacked 2D reconstructed PET images. The colors only show reflections in surface of the brain. The movie is generated found from a reconstruction (filtered backprojection) of projections [1].
  1. Peter Toft, The Radon Transform - Theory and Implementation, Ph.D. thesis. Department of Mathematical Modelling, Technical University of Denmark, June 1996. 326 pages.
Peter Toft, 1995

icon [0.5Mb-MPEG1] Movie showing a fly by tour in a saliency map. The saliency map is a representation of the importance of brain regions for a neural network model of an activation study. In an activation study subjects are either active (say, doing targetted saccadic eye movements) or resting in a baseline reference state. The present saliency map corresponds to a saccade eye movement study carried out by Dr. Ian Law at the Cyclotron and PET Unit at the Copenhagen University Hospital Rigshospitalet
Niels Mørch, 1995

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[0.7Mb-MPEG1] Movie showing slices of morphed MRI images. To eliminate variance in functional group studies we morph subjects anatomically. In this demonstration the MRI scans of two subject are seen (right and left). The subject on the left side is then morphed to fit the subject to the right, as seen in the center display. The morphing is truely 3D, and based on local match.

Ulrik Kjems, Peter Philipsen


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MPEG movies from the functional neuroimaging process. The first two movies are from the the cyclotron room where the radioactive atoms used in the PET scanning are produced. The big yellow box is the actual cyclotron. The next three movies are from the PET scanner room. The first movie shows neurolog Ian Law instructing a subject (Finn), in the second movie Finn is doing the task under investigation: saccadic eye-movement. The last shows the light emitting diodes that Finn is to follow with his eyes. The very last movie shows, with volume rendering, the result from an artificial neural network analysis of the acquired functional images.

Ulrik Kjems, Finn Årup Nielsen, 1996 May


icon [2Mb-Quicktime] Movie showing a tour around a MRI scanned brain, i.e. found from magnetical resonance scanning.
Niels Mørch, Jesper James Jensen

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Animation of brain activation

[4.3Mb-MPEG1] Animation showing the activation in the brain in connection with active movement of the hands. The animation was made by students in 1996 with the commercial program SoftImage.
Jakob Keis Hansen and Kasper Høy Nielsen, 1996 September
© Jakob Keis Hansen and Kasper Høy Nielsen, 1996.

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Functional mapping by Ian Law

Volume visualization of functional human brain mapping experiments carried out by Dr. Ian Law of the Copenhagen University Hospital Rigshospitalet. The result of a statistical analysis of the functional PET images are merged with an anatomical MRI scan.

See also the subpage with more movies.
Finn Årup Nielsen, 1995, 2009,

icon CS Cognitive Systems
IMM Department of Informatics and Mathematical Modelling
DTU Technical University of Denmark

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