Journal ArticleDOI
Restoration of MR-induced artifacts in simultaneously recorded MR/EEG data.
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TLDR
This work has shown how these artifacts can be strongly reduced or even removed through application of an adaptive artifact restoration scheme, which has proved to be fully automatic and to retain high frequency EEG information, which is indispensable for many EEG applications.About:
This article is published in Magnetic Resonance Imaging.The article was published on 1999-11-01. It has received 83 citations till now. The article focuses on the topics: Artifact (error) & Electroencephalography.read more
Citations
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Journal ArticleDOI
A method for removing imaging artifact from continuous EEG recorded during functional MRI.
TL;DR: It is demonstrated that simultaneous EEG/ fMRI studies are for the first time possible, extending the scope of EEG/fMRI studies considerably.
Journal ArticleDOI
Correlates of alpha rhythm in functional magnetic resonance imaging and near infrared spectroscopy.
Matthias Moosmann,Petra Ritter,Ina Krastel,Andrea Brink,Sebastian Thees,Felix Blankenburg,Birol Taskin,Hellmuth Obrig,Arno Villringer +8 more
TL;DR: The data suggest that alpha activity in the occipital cortex is associated with metabolic deactivation, and mapping of spontaneously synchronizing distributed neuronal networks is thus shown to be feasible.
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Integration of fMRI and simultaneous EEG: towards a comprehensive understanding of localization and time-course of brain activity in target detection
Christoph Mulert,Lorenz Jäger,Robert Schmitt,Patrick Bussfeld,Oliver Pogarell,Hans-Jürgen Möller,Georg Juckel,Ulrich Hegerl +7 more
TL;DR: The results suggest that the combination of EEG and fMRI permits an improved understanding of the spatiotemporal dynamics of brain activity.
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Simultaneous EEG-fMRI.
Petra Ritter,Arno Villringer +1 more
TL;DR: The utilization of fMRI evidence to better constrain solutions of the inverse problem of source localization of EEG activity is an exciting possibility, but this approach should be applied cautiously since the degree of overlap between underlying neuronal activity sources is variable and, for the most part, unknown.
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Quality of EEG in simultaneous EEG-fMRI for epilepsy
Christian Bénar,Yahya Aghakhani,Yunhua Wang,Aaron Izenberg,Abdullah Al-Asmi,François Dubeau,Jean Gotman +6 more
TL;DR: The practical procedures developed to reduce artifacts in a series of 10 epileptic patients, in the context of the visualization of epileptic spikes, are reported here.
References
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Journal ArticleDOI
Identification of EEG events in the MR scanner : The problem of pulse artifact and a method for its subtraction
TL;DR: It is concluded that in some subjects, EEG/fMRI studies will be feasible only using PA subtraction, and particular attention has been given to reliable ECG peak detection and ensuring that the average PA waveform is free of other EEG artifacts.
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Monitoring the patient's EEG during echo planar MRI
TL;DR: By careful selection and arrangement of analog multiplexed cable-telemetry equipment to eliminate both ferrous and RF sources, a stable, readable EEG can be obtained without interfering with the diagnostic quality of the MRI.
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EEG-triggered echo-planar functional MRI in epilepsy
Steven Warach,John R. Ives,Gottfried Schlaug,Mahesh R. Patel,David Darby,Venkatesan Thangaraj,Robert R. Edelman,Donald L. Schomer +7 more
TL;DR: Results are reported in two patients who showed focally higher signal intensity, reflective of increased local blood flow, in ultrafast functional MRI timed to epileptic discharges recorded while the patients were in the imager and compared with images not associated with discharges.
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Simultaneous functional magnetic resonance imaging and electrophysiological recording
Frank Huang-Hellinger,Hans C. Breiter,Glen McCormack,Mark S. Cohen,Kenneth K. Kwong,Jeffrey P. Sutton,Robert L. Savoy,Robert M. Weisskoff,Timothly L. Davis,John R. Baker,John W. Belliveau,Bruce R. Rosen +11 more
TL;DR: The initial results suggest this can be done safely and without compromise of the fMRI data, and the usefulness of this technique for studies of such things as sleep and epilepsy is promising.
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Restoration of electrophysiological signals distorted by inductive effects of magnetic field gradients during MR sequences.
TL;DR: The method takes advantage of the fact that under certain conditions, the effect of switching the B0‐field gradient upon an electrophysiological signal can be modeled as a linear time‐invariant system and fully characterized by pulse response functions.