Novelty indices: identifiers of potentially interesting time-courses in functional MRI data

被引：13

作者：

Baumgartner, R ^{[1
]}

Somorjai, R ^{[1
]}

Summers, R ^{[1
]}

Richter, W ^{[1
]}

Ryner, L ^{[1
]}

机构：

[1] Natl Res Council Canada, Inst Biodiagnost, Winnipeg, MB R3B 1Y6, Canada

来源：

MAGNETIC RESONANCE IMAGING | 2000年 / 18卷 / 07期

关键词：

functional MR imaging; novelty index; kurtosis; negentropy; 1-lag autocorrelation; white" noise; temporal structure;

D O I：

10.1016/S0730-725X(00)00171-5

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

In a systematic study of hybrid MR time-series with simulated "activation" (contrast-to-noise range 1-10) we investigated the power and compared the ability of the "novelty indices" (NI) kurtosis, negentropy, and 1-lag autocorrelation, to discriminate between potentially interesting ("structured") and uninteresting ("noisy") tirne-courses (TCs). NIs may he employed as preprocessing tools to focus only on the interesting TCs prior to any further exploratory or confirmatory approach. (C) 2000 Elsevier science Inc. All rights reserved.

引用

页码：845 / 850

页数：6

共 26 条

[1] [Anonymous], P INT C ART NEUR NET
[2] Comparison of two exploratory data analysis methods for fMRI: fuzzy clustering vs. principal component analysis
Baumgartner, R
Ryner, L
Richter, W
Summers, R
Jarmasz, M
Somorjai, R
[J]. MAGNETIC RESONANCE IMAGING, 2000, 18 (01) : 89 - 94
[3] Dynamical cluster analysis of cortical fMRI activation
Baune, A
Sommer, FT
Erb, M
Wildgruber, D
Kardatzki, B
Palm, G
Grodd, W
[J]. NEUROIMAGE, 1999, 9 (05) : 477 - 489
[4] WEIGHTED KAPPA - NOMINAL SCALE AGREEMENT WITH PROVISION FOR SCALED DISAGREEMENT OR PARTIAL CREDIT
COHEN, J
[J]. PSYCHOLOGICAL BULLETIN, 1968, 70 (04) : 213 - &
[5] A hierarchical clustering method for analyzing functional MR images
Filzmoser, P
Baumgartner, R
Moser, E
[J]. MAGNETIC RESONANCE IMAGING, 1999, 17 (06) : 817 - 826
[6] Direct and non-direct measurement techniques for analysis of skin surface topography
Fischer, TW
Wigger-Alberti, W
Elsner, P
[J]. SKIN PHARMACOLOGY AND APPLIED SKIN PHYSIOLOGY, 1999, 12 (1-2): : 1 - 11
[7] ANALYSIS OF FMRI TIME-SERIES REVISITED
FRISTON, KJ
HOLMES, AP
POLINE, JB
GRASBY, PJ
WILLIAMS, SCR
FRACKOWIAK, RSJ
TURNER, R
[J]. NEUROIMAGE, 1995, 2 (01) : 45 - 53
[8] On clustering fMRI time series
Goutte, C
Toft, P
Rostrup, E
Nielsen, FÅ
Hansen, LK
[J]. NEUROIMAGE, 1999, 9 (03) : 298 - 310
[9] PERMUTATIONAL EXTREME VALUES OF AUTOCORRELATION COEFFICIENTS AND A PITMAN TEST AGAINST SERIAL DEPENDENCE
HALLIN, M
MELARD, G
MILHAUD, X
[J]. ANNALS OF STATISTICS, 1992, 20 (01) : 523 - 534
[10] Hyvarinen A., 1999, Neural Computing Surveys, V2

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