Science Current Events | Science News | Brightsurf.com
 

Unprecedented accuracy in locating brain electrical activity with new device

July 27, 2012
Researchers at Aalto University in Finland have developed the world's first device designed for mapping the human brain that combines whole-head magnetoencephalography (MEG) and magnetic resonance imaging (MRI) technology. MEG measures the electrical function and MRI visualizes the structure of the brain. The merging of these two technologies will produce unprecedented accuracy in locating brain electrical activity non-invasively.

We expect that the new technology will improve the accuracy of brain mapping of patients with epilepsy. It may also improve the diagnosis of cancer patients because the improved image contrast may facilitate the characterization of cancer tissue, says Academy Professor Risto Ilmoniemi.

The innovative MEG-MRI device will allow brain imaging for new patients, such as those with metal implants. Also, the silent and open device will not scare children or make people feel claustrophobic. In the future, this development can also reduce costs as images can be obtained in one session rather than two, Ilmoniemi states.

The problem with MEG is that when the technique is used separately, the image accuracy can be compromised because of the movement of the brain. Also, the image it provides may not be accurate enough for precise brain surgery. In the past, it was not possible to combine high-field MRI and MEG because their magnetic fields interfered with one another. Extremely sensitive magnetic field sensors have now been developed, so scientists can now use the new low-field MRI with a magnetic field strength of only a few hundred-thousandths of that of the high-field MRI device. Fusing these two technologies produces localization accuracy that was not possible with MRI or MEG alone.

Aalto University


Related Magnetoencephalography Current Events and Magnetoencephalography News Articles


Study uncovers why almost winning is just as good for some gamblers
A new study led by the University of Exeter and Swansea University has pinpointed the changes in the brain that lead gamblers to react in the same way to near-misses as they do to winning.

Study Shows Autistic Brains Create More Information at Rest
New research from Case Western Reserve University and University of Toronto neuroscientists finds that the brains of autistic children generate more information at rest - a 42% increase on average.

Expanding our view of vision
Every time you open your eyes, visual information flows into your brain, which interprets what you're seeing.

In the blink of an eye
Imagine seeing a dozen pictures flash by in a fraction of a second. You might think it would be impossible to identify any images you see for such a short time.

NIST calibration tools to encourage use of novel medical imaging technique
The National Institute of Standards and Technology (NIST) has developed prototype calibration tools for an experimental medical imaging technique that offers new advantages in diagnosing and monitoring of certain cancers and possibly other medical conditions.

Study finds altered brain connections in epilepsy patients
Patients with the most common form of focal epilepsy have widespread, abnormal connections in their brains that could provide clues toward diagnosis and treatment, according to a new study published online in the journal Radiology.

Speedier scans reveal new distinctions in resting and active brain
A boost in the speed of brain scans is unveiling new insights into how brain regions work with each other in cooperative groups called networks.

Brain maps to benefit epileptic surgery
A brain imaging research team led by Simon Fraser University neuroscientist Dr. Ryan D'Arcy has found a new way to help surgeons more accurately plan for surgical treatment in epilepsy.

Detecting autism from brain activity
Neuroscientists from Case Western Reserve University School of Medicine and the University of Toronto have developed an efficient and reliable method of analyzing brain activity to detect autism in children.

Man-made material pushes the bounds of superconductivity
A multi-university team of researchers has artificially engineered a unique multilayer material that could lead to breakthroughs in both superconductivity research and in real-world applications.
More Magnetoencephalography Current Events and Magnetoencephalography News Articles

Clinical Magnetoencephalography and Magnetic Source Imaging

Clinical Magnetoencephalography and Magnetic Source Imaging
by Andrew C. Papanicolaou (Author)


This is the first volume to explore the field of clinical magnetoencephalography (MEG) and magnetic source imaging (MSI), the techniques measuring the magnetic fields generated by neuronal activity in the brain. Describing the empirical knowledge gained during the last two decades, this book will serve as a basis for the training of clinicians and scientists entering this new and exciting field. The book covers the methods for recording MEG and performing MSI in a clinical setting and includes practical examples of data collection and analysis. It explains why MEG should be used in the evaluation and treatment of patients being considered for epilepsy surgery, concluding with a section describing the potential for future applications of these methods. This is essential reading for...

MEG: An Introduction to Methods

MEG: An Introduction to Methods
by Peter Hansen (Editor), Morten Kringelbach (Editor), Riitta Salmelin (Editor)


Magnetoencephalography (MEG) is an exciting brain imaging technology that allows real-time tracking of neural activity, making it an invaluable tool for advancing our understanding of brain function. In this comprehensive introduction to MEG, Peter Hansen, Morten Kringelbach, and Riitta Salmelin have brought together the leading researchers to provide the basic tools for planning and executing MEG experiments, as well as analyzing and interpreting the resulting data. Chapters on the basics describe the fundamentals of MEG and its instrumentation, and provide guidelines for designing experiments and performing successful measurements. Chapters on data analysis present it in detail, from general concepts and assumptions to analysis of evoked responses and oscillatory background activity....

Magnetoencephalography: From Signals to Dynamic Cortical Networks (Series in Bioengineering)

Magnetoencephalography: From Signals to Dynamic Cortical Networks (Series in Bioengineering)
by Selma Supek (Editor), Cheryl J. Aine (Editor)


Magnetoencephalography (MEG) is an invaluable functional brain imaging technique that provides direct, real-time monitoring of neuronal activity necessary for gaining insight into dynamic cortical networks. Our intentions with this book are to cover the richness and transdisciplinary nature of the MEG field, make it more accessible to newcomers and experienced researchers and to stimulate growth in the MEG area. The book presents a comprehensive overview of MEG basics and the latest developments in methodological, empirical and clinical research, directed toward master and doctoral students, as well as researchers. There are three levels of contributions: 1) tutorials on instrumentation, measurements, modeling, and experimental design; 2) topical reviews providing extensive coverage of...

Introduction to Biomedical Engineering, Third Edition

Introduction to Biomedical Engineering, Third Edition
by John Enderle (Author), Joseph Bronzino (Author)


Introduction to Biomedical Engineering is a comprehensive survey text for biomedical engineering courses. It is the most widely adopted text across the BME course spectrum, valued by instructors and students alike for its authority, clarity and encyclopedic coverage in a single volume. Biomedical engineers need to understand the wide range of topics that are covered in this text, including basic mathematical modeling; anatomy and physiology; electrical engineering, signal processing and instrumentation; biomechanics; biomaterials science and tissue engineering; and medical and engineering ethics. Enderle and Bronzino tackle these core topics at a level appropriate for senior undergraduate students and graduate students who are majoring in BME, or studying it as a combined course with a...

Magnetoencephalography (Advances in Neurology)

Magnetoencephalography (Advances in Neurology)
by Susumu Sato (Editor)




Magnetoencephalography: Webster's Timeline History, 1968 - 2007

Magnetoencephalography: Webster's Timeline History, 1968 - 2007
by Icon Group International (Author)


Webster's bibliographic and event-based timelines are comprehensive in scope, covering virtually all topics, geographic locations and people. They do so from a linguistic point of view, and in the case of this book, the focus is on "Magnetoencephalography," including when used in literature (e.g. all authors that might have Magnetoencephalography in their name). As such, this book represents the largest compilation of timeline events associated with Magnetoencephalography when it is used in proper noun form. Webster's timelines cover bibliographic citations, patented inventions, as well as non-conventional and alternative meanings which capture ambiguities in usage. These furthermore cover all parts of speech (possessive, institutional usage, geographic usage) and contexts, including pop...

Cognitive Electrophysiology of Attention: Signals of the Mind

Cognitive Electrophysiology of Attention: Signals of the Mind
by George R. Mangun (Editor)


Cognitive Electrophysiology of Attention explores the fundamental mechanisms of attention and related cognitive functions from cognitive neuroscience perspectives. Attention is an essential cognitive ability that enables humans to process and act upon relevant information while ignoring distracting information, and the capacity to focus attention is at the core of mental functioning. Understanding the neural bases of human attention remains a key challenge for neuroscientists and psychologists, and is essential for translational efforts to treat attentional deficits in a variety of neurological and psychiatric disorders. Cognitive electrophysiology is at the center of a multidisciplinary approach that involves the efforts of psychologists, neuroscientists, neuropsychologists,...

Magnetoencephalography, Volume 68 (International Review of Neurobiology.)

Magnetoencephalography, Volume 68 (International Review of Neurobiology.)
by Hubert Preissl (Editor)


Magnetoencephalography (MEG) is the only neuroimaging method that provides high spatial and temporal information of human brain activation. In addition, MEG is completely non-invasive and allows recordings with minimal preparation time. This makes it suitable to investigate even fetuses in utero. This volume in the International Review of Neurobiology series addresses the most relevant research areas and shows how MEG could be used for investigations over the whole life span in humans.

Adaptive Processing of Brain Signals

Adaptive Processing of Brain Signals
by Saeid Sanei (Author)


In this book, the field of adaptive learning and processing is extended to arguably one of its most important contexts which is the understanding and analysis of brain signals. No attempt is made to comment on physiological aspects of brain activity; instead, signal processing methods are developed and used to assist clinical findings. Recent developments in detection, estimation and separation of diagnostic cues from different modality neuroimaging systems are discussed.These include constrained nonlinear signal processing techniques which incorporate sparsity, nonstationarity, multimodal data, and multiway techniques.Key features:Covers advanced and adaptive signal processing techniques for the processing of electroencephalography (EEG) and magneto-encephalography (MEG) signals, and...

Clinical Electrophysiology of the Somatosensory Cortex: A Combined Study Using Electrocorticography, Scalp-EEG, and Magnetoencephalography

Clinical Electrophysiology of the Somatosensory Cortex: A Combined Study Using Electrocorticography, Scalp-EEG, and Magnetoencephalography
by Christoph Baumgartner (Author)


The clinical electrophysiology of the human somatosensory cortex was investigated with a combined approach using cortical stimulations and somatosensory evoked responses on electrocorticography, scalp-EEG, and magnetoencephalography, a new neurophysiological technique. The spatiotemporal structure of the evoked response was studied with novel biophysical modeling techniques which allowed identification of the three-dimensional intracerebral location, time activity, and interaction of the neuronal sources in human somatosensory cortex. Thus, new aspects on the functional anatomy of the human somatosensory cortex could be elicited. Furthermore, the somatotopy of the hand somatosensory cortex was investigated. Clinically, the results of comparison of the different techniques can improve the...

© 2014 BrightSurf.com