The effects of these two applications on the mapping results were compared for selected slices and locations in terms of statistical and pattern.
📌 3 Maddede Bu Makale
🎯
Amaç & Hipotez:Functional magnetic resonance imaging is a technique with a primary and dominant effect in the investigation of the cognitive functions of the brain since it has a complex structure.
📊
Temel Bulgular & Veri:Spatial smoothing was performed using a 3 mm Gaussian kernel which is twice of the voxel size.
💡
Sonuç & Katkı:The effects of these two applications on the mapping results were compared for selected slices and locations in terms of statistical and pattern.
Functional magnetic resonance imaging is a technique with a primary and dominant effect in the investigation of the cognitive functions of the brain since it has a complex structure. In this study, data obtained from single subject was examined. First statistical parametric mapping results were obtained after applying the standard preprocessing steps with including smoothness. Spatial smoothing was performed using a 3 mm Gaussian kernel which is twice of the voxel size. Second, statistical parametric mapping results were obtained with applying standard preprocessing steps without smoothing. The effects of these two applications on the mapping results were compared for selected slices and locations in terms of statistical and pattern.
Daşgın, H., Yaman, A., Akdi, Y. (2019). PREPROCESSING STEPS IN fMRI: SMOOTHING. Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering, Volume: 61 Issue: 2. https://doi.org/10.33769/aupse.633838
Ogawa, S.T., Lee, M., Kay, A.R. and Tank, D.W., Brain Magnetic Resonance Imaging with Contrast Dependent on Blood Oxygenation. Proc. NatI. Acad. Sci., Biophysics (87), (1990), 9868-9872.
Ugurbil, K., Garwood, M., Hendrich, K., Hinke, R., Hu, X., Menon, R.S., Merkle, H., Ogawa, S. and Salmi, R., Imaging at High Magnetic Fields; Initial Experiences at 4 Tesla. Magn Reson Quarterly, (9), (1993), 259 – 277. Kwong, K.K., Belliveau, J.W., Chesler, D.A., Goldberg, I.E., Weisskoff, R.M., Poncelet, B.P., Kennedy, D.N., Hoppel, B.E., Cohen, M.S. and Turner, R., Dynamic magnetic resonance imaging of human brain activity during primary sensory stimulation. Proc. Nadl. Acad. Sci., (89), (1992), 5675-5679.
Huettel, S.A., Song, A.W. and McCarthy, G., Functional Magnetic Resonance Imaging, Second Edition. Sinauer Associates Inc, Sunderland, Massachusetts USA, 2008.
Mikla, M., Mareček, R., Hluštíkc, P., Pavlicová, M., Drasticha, A., Chlebus, P., Brázdil, M., Krupaf, P., Effects of spatial smoothing on fMRI group inferences. Magnetic Resonance Imaging 26, (2008), 490–503.
Friston, K. J., Josephs, O., Zarahn E and Poline, P., To Smooth or Not to Smooth? Bias and Efficiency in fMRI Time-Series Analysis, NeuroImage 12, (2000), 196–208.
Wilke, M. and Lidzba, K., LI-tool: A new toolbox to assess lateralization in functional MR-data. Journal of Neuroscience of Methods, (163), (2007), 128–136.