A phase bBased method for investigating the functional connectivity in the fMRI data

被引：5

作者：

Deshmukh, AV ^{[1
]}

Shivhare, V ^{[1
]}

Gadre, VM ^{[1
]}

Patkar, DP ^{[1
]}

Shah, S ^{[1
]}

Pungavkar, S ^{[1
]}

机构：

[1] Indian Inst Technol, Elect Engn Dept, Bombay 400076, Maharashtra, India

来源：

Proceedings of the IEEE INDICON 2004 | 2004年

关键词：

fMRI; functional connectivity; phase difference vector;

D O I：

10.1109/INDICO.2004.1497754

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Detection of functional MRI activation signal and observing the functional connectivity in the spatial domain are two important aspects in the analysis of functional MRI data. There are various approaches to test for functional connectivity. One of these is based on the correlation analysis in time domain. However, it assumes that the haemodynamic response model be a linear system. On the other hand this assumption may not always be true. Therefore, a different approach towards the signal detection and spatial functional connectivity is presented in this paper. Our method is based on the phases of the time series data. Concept of phase difference vector norm has been implemented. Results are presented on a clinical data set obtained from the ringer tapping experiment. Clinical relevance of functional connectivity is described along with the background information.

引用

页码：272 / 277

页数：6

共 15 条

[1]

BENDETTINI PA, 1993, MAGNET RESON MED, V30, P161

[2] FUNCTIONAL CONNECTIVITY IN THE MOTOR CORTEX OF RESTING HUMAN BRAIN USING ECHO-PLANAR MRI [J].

BISWAL, B ;

YETKIN, FZ ;

HAUGHTON, VM ;

HYDE, JS .

MAGNETIC RESONANCE IN MEDICINE, 1995, 34 (04) :537-541

[3] Reduction of physiological fluctuations in fMRI using digital filters [J].

Biswal, B ;

DeYoe, EA ;

Hyde, JS .

MAGNETIC RESONANCE IN MEDICINE, 1996, 35 (01) :107-113

[4]

Biswal BB, 1997, NMR BIOMED, V10, P165, DOI 10.1002/(SICI)1099-1492(199706/08)10:4/5<165::AID-NBM454>3.0.CO

[5]

2-7

[6]

Flandrin P, 1999, Time-frequency/time-scale analysis, volume 10 of Wavelet Analysis and its Applications, V10

[7]

Friston K., 1994, HUM BRAIN MAPP, V1, P153, DOI [10.1002/hbm.460010207, DOI 10.1002/HBM.460010207]

[8] Functional connectivity in the resting brain: A network analysis of the default mode hypothesis [J].

Greicius, MD ;

Krasnow, B ;

Reiss, AL ;

Menon, V .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2003, 100 (01) :253-258

[9]

Josephs O, 1997, HUM BRAIN MAPP, V5, P243, DOI 10.1002/(SICI)1097-0193(1997)5:4<243::AID-HBM7>3.0.CO

[10]

2-3

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