The availability of diffusion-weighted imaging with the fluid-attenuated inversion recovery method (FLAIR-DWI) with a low-performance MR unit in chronic ischemia disease

A. Tabuchi, T. Katsuda, R. Gotanda, T. Gotanda, K. Yamamoto, M. Mitani, Y. Takeda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Purpose: In magnetic resonance imaging (MRI), the diffusion-weighted image (DWI) is an important technique for diagnosis of acute infarction; however, in a 1.0 Tesla low-performance MR unit, chronic ischemia is often detected as a high signal and misdiagnosed as acute infarction. Fluid-attenuated inversion recovery (FLAIR)-DWI was used in an attempt to solve this problem, and the availability is discussed. Materials and methods: MR imaging was performed in 35 patients, after acute infarction (n = 19), and with chronic ischemia (n = 16). Conventional-DWI (C-DWI) and FLAIRDWI were used for all patients. The echo time (TE) was 140 ms. The signal-to-noise ratio (SNRs) and apparent diffusion coefficient (ADC) map in the region of acute infarction or chronic ischemia and contralateral normal brain were estimated. Results: In all regions, ADC was not significantly different between C-DWI and FLAIR-DWI (p>0.05). In chronic ischemia and acute infarction, the SNR of ischemic regions using FLAIR-DWI was significantly lower than that of C-DWI (p<0.05). Furthermore, the SNR of acute infarction regions was significantly higher than that in chronic ischemic regions (p<0.05). Conclusion: In a low-performance MR unit, the discrimination between chronic ischemia and acute infarction was improved by using FLAIR-DWI.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering
Subtitle of host publicationDiagnostic Imaging
Pages255-258
Number of pages4
Edition2
DOIs
Publication statusPublished - Dec 1 2009
EventWorld Congress on Medical Physics and Biomedical Engineering: Diagnostic Imaging - Munich, Germany
Duration: Sep 7 2009Sep 12 2009

Publication series

NameIFMBE Proceedings
Number2
Volume25
ISSN (Print)1680-0737

Other

OtherWorld Congress on Medical Physics and Biomedical Engineering: Diagnostic Imaging
CountryGermany
CityMunich
Period9/7/099/12/09

Keywords

  • 1.0Tesla
  • Chronic ischemic infarction
  • FLAIR-diffusion weighted imaging
  • Magnetic resonance image

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering

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    Tabuchi, A., Katsuda, T., Gotanda, R., Gotanda, T., Yamamoto, K., Mitani, M., & Takeda, Y. (2009). The availability of diffusion-weighted imaging with the fluid-attenuated inversion recovery method (FLAIR-DWI) with a low-performance MR unit in chronic ischemia disease. In World Congress on Medical Physics and Biomedical Engineering: Diagnostic Imaging (2 ed., pp. 255-258). (IFMBE Proceedings; Vol. 25, No. 2). https://doi.org/10.1007/978-3-642-03879-2-72