TY - GEN
T1 - 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
AU - Tabuchi, A.
AU - Katsuda, T.
AU - Gotanda, R.
AU - Gotanda, T.
AU - Yamamoto, K.
AU - Mitani, M.
AU - Takeda, Y.
N1 - Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
KW - 1.0Tesla
KW - Chronic ischemic infarction
KW - FLAIR-diffusion weighted imaging
KW - Magnetic resonance image
UR - http://www.scopus.com/inward/record.url?scp=77950876980&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77950876980&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-03879-2_72
DO - 10.1007/978-3-642-03879-2_72
M3 - Conference contribution
AN - SCOPUS:77950876980
SN - 9783642038785
T3 - IFMBE Proceedings
SP - 255
EP - 258
BT - World Congress on Medical Physics and Biomedical Engineering
PB - Springer Verlag
T2 - World Congress on Medical Physics and Biomedical Engineering: Diagnostic Imaging
Y2 - 7 September 2009 through 12 September 2009
ER -