Diffusion- and T2-weighted MRI of closed-head injury in rats: A time course study and correlation with histology

doi:10.1016/S0730-725X(96)00246-9

Magnetic Resonance Imaging

Volume 15, Issue 1, 1997, Pages 77-85

https://doi.org/10.1016/S0730-725X(96)00246-9 Get rights and content

Abstract

Diffusion- and T₂-weighted MRI were used to evaluate changes in brain water characteristics following closed-head injury in rats. Images were collected within the first 2 h and at 24 h and 7 days following the traumatic event and then compared with histology. The ratios between the apparent diffusion coefficients (ADCs) of the traumatized tissues and normal brain tissues were significantly different from unity and were found to be 0.79 ± 0.25 (p < 0.01), 0.49 ± 0.33 (p < 0.0002), and 3.47 ± 1.36 (p < 10⁻⁶) at 1–2 h, 24 h, and 1 week after the trauma, respectively. In severe trauma, areas of hyperintensity which were not apparent on the T₂-weighted images could be detected on the diffusion-weighted images within 1–2 h after the trauma. At 24 h following the traumatic event, large areas of hyperintensity are observed in both types of images. One week following the trauma, the ADCs of the traumatized tissues (1.84 ± 0.69 × 10⁻⁵ cm²/s) are much larger than those of normal brain (0.57 ± 0.19 × 10⁻⁵ cm²/s) and approach the value of free water. At 7 days, the areas of hyperintensity in the T₂-weighted images seem to underestimate the injured areas found by histology. At this time point a good correlation is obtained between the areas of hypointensity observed on the diffusion-weighted images and the infarct areas obtained by histology (r = 0.88).

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Original contributionDiffusion- and T2-weighted MRI of closed-head injury in rats: A time course study and correlation with histology

Abstract

Magn. Reson. Imaging

Magn. Reson. Imaging

J. Magn. Reson.

J. Magn. Reson.

J. Biol. Chem.

Neuropharmacology

MR imaging of intarvoxel incoherent motions: Application to diffusion and perfusion in neurologic disorders

Radiology

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Radiology

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AJR

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Clin. North Am.

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AJNR

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Stroke

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Original contribution
Diffusion- and T₂-weighted MRI of closed-head injury in rats: A time course study and correlation with histology

Early detection of regional cerebral ischemia in cats: Comparison of diffusion- and T₂-weighted MRI and spectroscopy

Diffusion-weighted MR imaging of acute stroke: Correlation with T₂-weighted and magnetic susceptibility-enhanced MR imaging in cats

T₂- and diffusion-weighted magnetic resonance imaging of a focal ischemic lesion in rat brain