Diffusion-Weighted MR Imaging of Intracerebral Hemorrhage
Open Access
- 1 January 2001
- journal article
- research article
- Published by The Korean Society of Radiology in Korean Journal of Radiology
- Vol. 2 (4), 183-191
- https://doi.org/10.3348/kjr.2001.2.4.183
Abstract
To document the signal characteristics of intracerebral hemorrhage (ICH) at evolving stages on diffusion-weighted images (DWI) by comparison with conventional MR images. In our retrospective study, 38 patients with ICH underwent a set of imaging sequences that included DWI, T1-and T2-weighted imaging, and fluid-attenuated inversion recovery (FLAIR). In 33 and 10 patients, respectively, conventional and echo-planar T2* gradient-echo images were also obtained. According to the time interval between symptom onset and initial MRI, five stages were categorized: hyperacute (n=6); acute (n=7); early subacute (n=7); late subacute (n=10); and chronic (n=8). We investigated the signal intensity and apparent diffusion coefficient (ADC) of ICH and compared the signal intensities of hematomas at DWI and on conventional MR images. DWI showed that hematomas were hyperintense at the hyperacute and late subacute stages, and hypointense at the acute, early subacute and chronic stages. Invariably, focal hypointensity was observed within a hyperacute hematoma. At the hyperacute, acute and early subacute stages, hyperintense rims that corresponded with edema surrounding the hematoma were present. The mean ADC ratio was 0.73 at the hyperacute stage, 0.72 at the acute stage, 0.70 at the early subacute stage, 0.72 at the late subacute stage, and 2.56 at the chronic stage. DWI showed that the signal intensity of an ICH may be related to both its ADC value and the magnetic susceptibility effect. In patients with acute stroke, an understanding of the characteristic features of ICH seen at DWI can be helpful in both the characterization of intracranial hemorrhagic lesions and the differentiation of hemorrhage from ischemia.Keywords
This publication has 29 references indexed in Scilit:
- Detection of hyperacute parenchymal hemorrhage of the brain using echo-planar T2 * -weighted and diffusion-weighted MRIEuropean Radiology, 2001
- Das kernspintomographische Erscheinungsbild der spontanen intrazerebralen BlutungDer Radiologe, 1999
- A Standardized MRI Stroke Protocol: Comparison with CT in Hyperacute Intracerebral HemorrhageStroke, 1999
- A Standardized MRI Stroke ProtocolStroke, 1999
- Detection of Hyperacute Primary Intraparenchymal Hemorrhage by Magnetic Resonance ImagingStroke, 1996
- Early detection of regional cerebral ischemia in cats: Comparison of diffusion‐ and T2‐weighted MRI and spectroscopyMagnetic Resonance in Medicine, 1990
- Magnetic relaxation in blood and blood clotsMagnetic Resonance in Medicine, 1990
- MR Imaging of Cerebral Hematomas at Different Field StrengthsJournal of Computer Assisted Tomography, 1989
- Sickle-cell hemoglobin: fall in osmotic pressure upon deoxygenation.Proceedings of the National Academy of Sciences of the United States of America, 1980
- Nuclear Magnetic Resonance Patterns of Intracellular Water as a Function of HeLa Cell CycleScience, 1976