الفهرس Only 14 pages are availabe for public view
 |  | from | 106 |  |  |
| | | from | 106 | | |
Abstract
It is truly amazing to realize that more than two decades after the invention of magnetic resonance imaging (MRI), this technology is still evolving with considerable speed. The technique of diffusion-weighted imaging (DWI) is one of the most recent products of this evolution. Briefly speaking, this approach is based on the measurement of Brownian motion of molecules. This technique can characterize water diffusion properties at each picture element (pixel) of an image. In different organs, water does not diffuse equally in all directions, a property called anisotropic diffusion. For example, brain water diffuses preferentially along axonal fiber directions. Now it is believed that it is possible to use this diffusion property as a probe to study the structure of spatial order in living organs non-invasively.
The aim of this study is to evaluate the role of diffusion weighted MRI in brain lesions .This study was conducted on 40 patients; including those with clinically suspected early ischemic lesions and those with debatable space occupying lesions (findings on conventional brain MRI), collected during 10 months duration , starting from July 2008 through may 2009.
All patients were subjected to full history taking, thorough clinical and neurological examination. Conventional and diffusion weighted MRI examinations of the brain were performed for all patients included in this study on the 1.5 T MRI scanner (GE)
Diffusion weighted MRI of the brain was processed Final diagnosis was reached either by surgical findings & histopathological examination or a consensus of clinical and imaging modalities The studied cases included 21 males and 19 females (with their age ranged from 8 to 70 years and a mean age of 37.5 years .