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Diffusion-Weighted MR Imaging of Intracerebral Hemorrhage
OBJECTIVE: To document the signal characteristics of intracerebral hemorrhage (ICH) at evolving stages on diffusion-weighted images (DWI) by comparison with conventional MR images. MATERIALS AND METHODS: In our retrospective study, 38 patients with ICH underwent a set of imaging sequences that inclu...
Autores principales: | , , , , , |
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Formato: | Texto |
Lenguaje: | English |
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The Korean Radiological Society
2001
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2718119/ https://www.ncbi.nlm.nih.gov/pubmed/11754324 http://dx.doi.org/10.3348/kjr.2001.2.4.183 |
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author | Kang, Bo Kiung Na, Dong Gyu Ryoo, Jae Wook Byun, Hong Sik Roh, Hong Gee Pyeun, Yong Seon |
author_facet | Kang, Bo Kiung Na, Dong Gyu Ryoo, Jae Wook Byun, Hong Sik Roh, Hong Gee Pyeun, Yong Seon |
author_sort | Kang, Bo Kiung |
collection | PubMed |
description | OBJECTIVE: To document the signal characteristics of intracerebral hemorrhage (ICH) at evolving stages on diffusion-weighted images (DWI) by comparison with conventional MR images. MATERIALS AND METHODS: 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. RESULTS: 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. CONCLUSION: 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. |
format | Text |
id | pubmed-2718119 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2001 |
publisher | The Korean Radiological Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-27181192009-07-30 Diffusion-Weighted MR Imaging of Intracerebral Hemorrhage Kang, Bo Kiung Na, Dong Gyu Ryoo, Jae Wook Byun, Hong Sik Roh, Hong Gee Pyeun, Yong Seon Korean J Radiol Original Article OBJECTIVE: To document the signal characteristics of intracerebral hemorrhage (ICH) at evolving stages on diffusion-weighted images (DWI) by comparison with conventional MR images. MATERIALS AND METHODS: 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. RESULTS: 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. CONCLUSION: 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. The Korean Radiological Society 2001 2001-12-31 /pmc/articles/PMC2718119/ /pubmed/11754324 http://dx.doi.org/10.3348/kjr.2001.2.4.183 Text en Copyright © 2001 The Korean Radiological Society http://creativecommons.org/licenses/by-nc/3.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Kang, Bo Kiung Na, Dong Gyu Ryoo, Jae Wook Byun, Hong Sik Roh, Hong Gee Pyeun, Yong Seon Diffusion-Weighted MR Imaging of Intracerebral Hemorrhage |
title | Diffusion-Weighted MR Imaging of Intracerebral Hemorrhage |
title_full | Diffusion-Weighted MR Imaging of Intracerebral Hemorrhage |
title_fullStr | Diffusion-Weighted MR Imaging of Intracerebral Hemorrhage |
title_full_unstemmed | Diffusion-Weighted MR Imaging of Intracerebral Hemorrhage |
title_short | Diffusion-Weighted MR Imaging of Intracerebral Hemorrhage |
title_sort | diffusion-weighted mr imaging of intracerebral hemorrhage |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2718119/ https://www.ncbi.nlm.nih.gov/pubmed/11754324 http://dx.doi.org/10.3348/kjr.2001.2.4.183 |
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