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Mouse brain seen in sharpest detail ever
Date:10/25/2010

DURHAM, N.C. The most detailed magnetic resonance images ever obtained of a mammalian brain are now available to researchers in a free, online atlas of an ultra-high-resolution mouse brain, thanks to work at the Duke Center for In Vivo Microscopy.

In a typical clinical MRI scan, each pixel in the image represents a cube of tissue, called a voxel, which is typically 1x1x3 millimeters. "The atlas images, however, are more than 300,000 times higher resolution than an MRI scan, with voxels that are 20 micrometers on a side," said G. Allan Johnson, Ph.D., who heads the Duke Center for In Vivo Microscopy and is Charles E. Putman Distinguished Professor of Radiology.

The interactive images in the atlas will allow researchers worldwide to evaluate the brain from all angles and assess and share their mouse studies against this reference brain in genetics, toxicology and drug discovery.

The brain atlas' detail reaches a resolution of 21 microns. A micron is a millionth of a meter, or 0.00003937 of an inch.

An article detailing the creation of the atlas was published as the cover story in the November issue of NeuroImage journal.

The atlas used three different magnetic resonance microscopy protocols of the intact brain followed by conventional histology to highlight different structures in the reference brain. The brains were scanned using an MR system operating at a magnetic field more than 6 times higher than is routinely used in the clinic. The images were acquired on fixed tissues, with the brain in the cranium to avoid the distortion that occurs when tissues are thinly sliced for conventional histology.

The new Waxholm Space brain can be digitally sliced from any plane or angle, so that researchers can precisely visualize any regions in the brain, along any axis without loss of spatial resolution. (Waxholm is the Swedish town where the early concepts gelled for this atlas.)

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Contact: Mary Jane Gore
mary.gore@duke.edu
919-660-1309
Duke University Medical Center
Source:Eurekalert  

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