Complex data analysis in high-resolution SSFP fMRI.

Complex data analysis in high-resolution SSFP fMRI. Research Abstract Details 

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Complex data analysis in high-resolution SSFP fMRI. Abstract Text:

Jongho Lee,Morteza Shahram,Armin Schwartzman,John M Pauly,

In transition-band steady-state free precession (SSFP) functional MRI (fMRI), functional contrast originates from a bulk frequency shift induced by a deoxygenated hemoglobin concentration change in the activated brain regions. This frequency shift causes a magnitude and/or phase-signal change depending on the off-resonance distribution of a voxel in the balanced-SSFP (bSSFP) profile. However, in early low-resolution studies, only the magnitude signal activations were shown. In this paper the task-correlated phase-signal change is presented in a high-resolution (1 x 1 x 1 mm3) study. To include this phase activation in a functional analysis, a new complex domain data analysis method is proposed. The results show statistically significant phase-signal changes in a large number of voxels comparable to that of the magnitude-activated voxels. The complex-data analysis method successfully includes these phase activations in the activation map and thus provides wider coverage compared to magnitude-data analysis results.

Complex data analysis in high-resolution SSFP fMRI. Publishing Authors By Initials

J Lee,M Shahram,A Schwartzman,JM Pauly,

For similar natural sciences: science: models, theoretical research abstracts see: natural sciences: science: models, theoretical research

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Complex data analysis in high-resolution SSFP fMRI. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Magnetic resonance in medicine : official journal

VOLUME: 57

Page Numbers: 905-17

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ISSN: 0740-3194

DAY: 3

MONTH: May

YEAR: 2007

Complex data analysis in high-resolution SSFP fMRI. Information

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LANGUAGE: eng

NlmUniqueID: 8505245

Complex data analysis in high-resolution SSFP fMRI. Keywords Mesh Terms:

KEYWORDS: Models, Theoretical

MESH TERMS: methods

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Grant and Affiliation Information for Complex data analysis in high-resolution SSFP fMRI.

AFFILIATION: Magnetic Resonance Systems Research Laboratory, Department of Electrical Engineering, Stanford University, Stanford, California 94305-9510, USA. jonghoyi@mrsrl.stanford.edu

Country: United States

AGENCY: United States NIBIB

GRANT: R21EB002969

ACRONYM: EB

MEDLINETA: Magn Reson Med

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