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VWN News: 3D X-ray Film: Rapid Movements in Real Time
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 3D X-ray Film: Rapid Movements in Real Time

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Date posted: 17/03/2014

How does the hip joint of a crawling weevil move? A technique to record 3D X-ray films showing the internal movement dynamics in a spatially precise manner and, at the same time, in the temporal dimension has now been developed by researchers at ANKA, KIT’s Synchrotron Radiation Source. The scientists applied this technique to a living weevil. From up to 100,000 two-dimensional radiographs per second, they generated complete 3D film sequences in real time or slow motion.

For scientific evaluation, the three-dimensional contours of anatomic structures have to be clearly visible. This is achieved by the so-called phase contrast. If highly parallel X-rays pass the biological examination object, wave optics phenomena occur, which highlight the inner and outer contours.

“It is these contours that matter to us. We want to distinguish individual functional elements that move relative to each other. That is why we need sharp contours,” Alexey Ershov, the expert for image analysis in the team, says. From the X-ray source to movement analysis, all process stages are designed to filter out image noise without reducing contrast. This also applies to the mathematic algorithms optimized for radiography. They reconstruct three spatial and one temporal dimension and derive exact movement patterns from the data.

See the full Story via external site: www.kit.edu



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