| Project/Area Number |
13670944
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Radiation science
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| Research Institution | UNIVERSITY OF TOKUSHIMA |
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Principal Investigator |
HARADA Masafumi University of Tokushima, School of Medicine, Professor, 医学部, 教授 (20228654)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUZAKI Kenji University of Tokushima, University Hospital, Assistant Porfessor, 医学部附属病院, 講師 (70274222)
MORI Kenji University of Tokushima, University Hospital, Assistant Porfessor, 医学部, 助手 (20274201)
UNO Masaaki University of Tokushima, University Hospital, Assistant Porfessor, 医学部, 講師 (90232884)
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2002: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2001: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | MRS / diffusion / LCModel / metabolite / cerebral infarction / brain tumor / NAA / lactate / Proton MRS / 拡散 / コンパートメント |
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| Research Abstract |
The apparent diffusion coefficients (ADCs) of water and metabolites observed by proton MR spectroscopy were evaluated in healthy volunteers and pathological changes in cases of acute cerebral infarction and brain tumor using a clinical MR scanner. The ADCs of NAA and Cr in cases of acute infarcion who were measured within 24 hours from onset were decreased compared to those of the normal controls. The ADC of Cho in cases of acute infarction was not much changed compared to NAA and Cr. This result suggested that the environment of Cho content was different from those of NAA and Cr.
The ADCs of metabolits in tumors were increased relative to those the controls, espeialy that of NAA much increased. The ADC of Cho in tumors was also increased more than that in acute infarction. This result indicated that different change of enviroment around Cho content existed between tumors and acute infarction.
These findings suggest that neuronal cell viscosity changes according to pathological status because NAA is a neuronal marker. Lactate ADC increased relative to the values of the other three major metabolites in cases of ischemia and tumor, suggesting their existence in a different compartment. These results indicate that metabolaite diffusion can be used to reveal differences in the intracellular environment depending on the pathological status.
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