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27 November 2013 12:59 pm ,
Vol. 342 ,
The new head of the National Center for Science Education promises to "fight the good fight" against attacks on...
Analyses of the H7N9 strains isolated from four new cases show that the virus is evolving rapidly, heightening anxiety...
In 2009, Jack Szostak shared a Nobel Prize for his part in discovering the role of telomeres, the end bits of...
Science has exposed a thriving academic black market in China involving shady agencies, corrupt scientists, and...
Paper-selling agencies flourish in the aura of reputable businesses. For some scientists, it may be difficult to tell...
Data collected by satellites and floating probes have chronicled a 2-decade rise in the temperature and thickness of a...
Cholesterol, the artery-clogging molecule that contributes to cardiovascular disease, has another nasty trick up its...
Until recently, the Defense Advanced Research Projects Agency (DARPA) kept its plans for its $70 million portion of the...
- 27 November 2013 12:59 pm , Vol. 342 , #6162
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ScienceShot: Medical Imaging, In A Snap
19 February 2012 9:23 pm
VANCOUVER, CANADA—Doctors struggle to keep squirming children still for long scans. Now, thanks to faster magnetic resonance imaging (MRI), they may no longer have to worry about keeping their patients still for so long. The above image of the blood flow through the heart of a 6-year-old with a congenital heart defect was acquired in 10 minutes rather than an hour, as with traditional MRI. To take faster images, researchers use algorithms similar to JPEG compression, they reported here today at the annual meeting of the American Association for the Advancement of Science (which publishes ScienceNOW). So-called compressed sensing MRIs offer a quicker way to snap pictures of soft tissues in time and space. Instead of capturing all data points, this technique records data randomly, drawing a sparse image. The incomplete pictures are filled in after the scan by algorithms that reveal the simplest solution for each pixel. While researchers are still perfecting this quick scanning method, a handful of clinics are already using it to slash scan times.
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