| Autor: |
Sung, Yul-Wan, Kawachi, Yousuke, Ogawa, Seiji |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
感性福祉研究所年報. (21):65-69 |
| ISSN: |
1344-9966 |
| Popis: |
Multi-echo planar imaging is an magnetic resonance imaging （MRI） sequence with which MRI images can be acquired at different echo-times after excitation. This sequences is applied to functional MRI （fMRI） for the removal of non-functional signal artifacts. Another application of this sequence for fMRI involves estimation of information to supplement the functional information by typical fMRI for the creation of a functional brain map. In a previous study, we proposed a novel method by which microscopic neuronal changes originating from population differences could be detected. Multi-echo planar imaging can be problematic due to artifacts caused by magnetic susceptibility in the boundary regions between the brain tissues and other brain compartments. This occurs because of different transverse relaxation times. In this study, we examined the way head motion affects signals acquired at different echo-times by multi-echo planar imaging. It was found that the motion signal patterns were slightly different between two images with different echo-times. We devised a method to remove this discrepancy. which was successfully applied. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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