What is the best similarity measure for motion correction in fMRI time series?

L Freire, A Roche, JF Mangin - IEEE transactions on medical …, 2002 - ieeexplore.ieee.org
It has been shown that the difference of squares cost function used by standard realignment
packages (SPM and AIR) can lead to the detection of spurious activations, because the …

A four-dimensional registration algorithm with application to joint correction of motion and slice timing in fMRI

A Roche - IEEE transactions on medical imaging, 2011 - ieeexplore.ieee.org
Existing groupwise image registration algorithms for longitudinal data generally ignore
continuous movements and signal changes that occur throughout image acquisition. We …

Motion correction algorithms may create spurious brain activations in the absence of subject motion

L Freire, JF Mangin - Neuroimage, 2001 - Elsevier
This paper describes several experiments that prove that standard motion correction
methods may induce spurious activations in some motion-free fMRI studies. This artifact …

Characterization and correction of interpolation effects in the realignment of fMRI time series

S Grootoonk, C Hutton, J Ashburner, AM Howseman… - NeuroImage, 2000 - Elsevier
Subject motion in functional magnetic resonance imaging (fMRI) studies can be accurately
estimated using realignment algorithms. However, residual changes in signal intensity …

Accurate alignment of functional EPI data to anatomical MRI using a physics-based distortion model

C Studholme, RT Constable… - IEEE transactions on …, 2000 - ieeexplore.ieee.org
Mapping of functional magnetic resonance imaging (fMRI) to conventional anatomical MRI is
a valuable step in the interpretation of fMRI activations. One of the main limits on the …

Decoupled automated rotational and translational registration for functional MRI time series data: the DART registration algorithm

LC Maas, B deB. Frederick… - Magnetic Resonance in …, 1997 - Wiley Online Library
A rapid, in‐plane image registration algorithm that accurately estimates and corrects for
rotational and translational motion is described. This automated, one‐pass method achieves …

Motion correction in fMRI via registration of individual slices into an anatomical volume

B Kim, JL Boes, PH Bland… - … in Medicine: An …, 1999 - Wiley Online Library
An automated retrospective image registration based on mutual information is adapted to a
multislice functional magnetic resonance imaging (fMRI) acquisition protocol to provide …

A quantitative comparison of motion detection algorithms in fMRI

BA Ardekani, AH Bachman, JA Helpern - Magnetic resonance imaging, 2001 - Elsevier
An important step in the analysis of fMRI time-series data is to detect, and as much as
possible, correct for subject motion during the course of the scanning session. Several …

Implicit reference-based group-wise image registration and its application to structural and functional MRI

X Geng, GE Christensen, H Gu, TJ Ross, Y Yang - Neuroimage, 2009 - Elsevier
In this study, an implicit reference group-wise (IRG) registration with a small deformation,
linear elastic model was used to jointly estimate correspondences between a set of MRI …

Improved image registration by using Fourier interpolation

WF Eddyy, M Fitzgerald, DC Noll - Magnetic resonance in …, 1996 - Wiley Online Library
This paper presents a technique for performing two‐dimensional rigid‐body image
registration for functional magnetic resonance images (fMRI). The method provides accurate …