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Biomag 96 [2000]

3
Workshop on Biomagnetic Instrumentation
7
Reference noise cancellation: Optimizations and Caveats
11
Positioning of MCG Measurement Equipment
15
A Low-Noise, Integrated DC SQUID Magnetometer for Applications in Biomagnetism
20
Magnetocardiograms Recorded by First-Order Gradiometers Using HTS rf SQUIDs
24
A Realtime, High-Bandwidth, Programmable Digital Signal-Processing System for Monitoring, Acquisition, Filtering, and Archival Storage of Biomagnetic Signals
28
Magnetic Measurement Techniques for Locating Foreign Bodies in Humans
32
Optimisation of Co-Registration Procedures for Biomagnetic Measurements Using a Thermoplastic Mask
35
Design of a Magnetically Shielded Room for Development of HTS SQUID Systems for Magnetocardiography
39
A Digital-Signal-Processor (DSP) Flux-Locked-Loop (FLL) for LTC SQUIDs with Automatic Reset and Feedback Cancellation
43
A 32-Channel MCG System Cooled by a GM/JT Cryocooler
47
A Cryocooled SQUID System with Minimal Clearance Between the Pick-up Coil and the Specimen
51
A Comparison of Vector and Radial Magnetometer Arrays for Whole-Head Magnetoencephalography
55
32 Channel High Tc SQUID System for Biomagnetism
59
Source Detectability for Multichannel Biomagnetic Sensors
63
A Digital Flux-Locked Loop for High Temperature SQUID Magnetometer and Gradiometer Systems with Field Cancellation
67
Characterisation of a Planar Second-Order Gradiometer in a Lightly Shielded Environment
71
Magnetic Field Error of a Current Dipole in a Superconducting Shield
75
High Tc Superconducting Shielded Biomagnetometer System
79
Current Dipole Localization Errors as a Function of the System Noise and the Number of Sensors
83
Auditory Brainstem Evoked Fields Measured in a High Tc Superconducting Shield
87
High Performance Magnetically Shielded Room for Clinical Measurements
91
An AC Susceptometer with a Large Magnetised Volume for Biological Samples
95
A Six-Channel SQUID Biomagnetometer Optimised for Fetal Magnetocardiography
99
High Temperature Superconducting Quantum Interference Devices in a Superconductor-Normal-Superconductor Geometry
103
A Digital SQUID Controller for Unshielded Biomagnetic Measurements
107
Investigation of the Thin Film SQUIDs Using Double Layer Model of the Secondary Sources
110
DC-MEG Studies: Development of Techniques for Resolving DC Fields
114
Development of a 61-Channel MEG System Cooled by a GM/JT Cryocooler
118
Low-Noise, Single Layer YBa<Subscript>2</Subscript>Cu<Subscript>3</Subscript>O<Subscript>7−δ</Subscript> DC SQUID Magnetometers for Shielded and Unshielded Operation
122
The Use of Software Magnetometers for Ambient Magnetic Noise Cancellation in Unshielded Environment
126
The Use of a Current Feedback Loop for Active Compensation of Magnetic Noise in Superconducting Magnetocardiograph
130
A Skull-Based Multiple Dipole Phantom for EEG and MEG Studies
134
High-T<Subscript>c</Subscript> SQUID Gradiometers for Magnetocardiography in an Unshielded Environment
138
143 Channel Whole-Cortex MEG System
142
SEFs from the Human Spinal Cord using a Novel Second Order Planar Gradiometer
146
High-T<Subscript>c</Subscript> Superconducting rf Receiver Coils for High Resolution Magnetic Resonance Imaging of the Spine
150
3-D Magnetic Field Analysis of a Magnetically Shielded Room for Biomagnetic Measurements
154
A 129-channel Vector Neuromagnetic Imaging System
158
Magnetocardiography Using SQUIDs Cooled by Liquid Nitrogen
163
Comparison between different approaches to the biomagnetic inverse problem — workshop report
177
Distributed Source Reconstruction Using a Non-Linear Spatio-Temporal Regularization Method: An Alternative to LORETA
181
Localization of Extended Sources Using a Modified Linear Estimation Approach
185
Inverse Magnetography for Reentry Currents
189
Frequency Domain Distributed Inverse Solutions
193
Small Volume Resistivity Changes Observed Using MEG
197
A Weighting Matrix to Remove Depth Bias in the Linear Biomagnetic Inverse Problem with Application to Cardiology
201
Imaging Properties of “Myocardial Current Imaging”
205
Practicability of Neuromagnetic Source Analysis Using the Finite Element Method
209
A Numerically Stable Approximation for the Magnetic Field of the Conducting Spheroid Close to the Symmetry Axis
213
Source Reconstructions by Spatial Deviation Scans
217
Generalized Inverse Solution for Bimodal Electro-Magnetic Source Images
221
Can Compact Currents Be Uniquely Determined?
225
Estimation of Distributed Sources with Adjustable Contrast
229
Aspects of Non-Uniqueness: How One Source Affects the Reconstruction of Another
233
The Theoretical Basis of Iterative Distributed Solutions to the Biomagnetic Inverse Problem
237
Anatomically Constrained vs Unconstrained Dipole Fit in the Combination of MEG and MRI
241
One Effect of a Maximum Possible Current Strength
245
Multi-Source Localization in MEG Using Simulated Annealing: Model Order Determination and Parameter Accuracy
249
A Three-Dimensional Rule-Assisted Interpolation Algorithm for Iso-Field Mapping of Neuromagnetic Signals
253
The Influence of Glial Buffering Currents on Sustained Neuromagnetic Fields
257
Magnetic Field Tomography: Theoretical Basis, Performance Measures and Limitations
261
Algorithm for Magnetocardiography Analysis Based on Multi Channel SQUID and Thoracic MR Images
265
Estimation of Distributed Sources of Auditory Evoked Magnetic Fields in the Human Brain
270
A New Approach to the Reconstructing Source Distribution
274
A Comparative Study of Minimum Norm Inverse Methods for MEG Imaging
278
Development, Implementation and Applications of Single Epoch Analysis of MEG Signals
282
Dipole Localization Accuracy as a Function of the Area Covered by the Magnetometer System
286
Towards a Standardized Representation of Neuromagnetic Data
290
Multiple Current-Dipole Distribution Reconstructed by Modified Selective Minimum-Norm Method
294
An Estimation Algorithm of Neuromagnetic Source Using MRI Information
298
Realistic Modeling, Analysis and Animated 3D Visualization for MEG Studies
302
Subspace Angles: A Metric for Comparisons in EEG and MEG
306
Comparison of the Constant and Linear Boundary Element Method for EEG and MEG Forward Modeling
310
MEG-Based Imaging of Focal Neuronal Current Sources
314
A Four-Sensor Skeleton Configuration for Single Dipole Localization
318
The New Methods of Localization and Reconstruction of Biomagnetic Signal Sources
322
Effects of Tissue Conductivity Variations on Cardiac Magnetic Fields
326
Discrete Spline Electric-Magnetic Tomography (DSPECT) Based on Realistic Neuroanatomy
330
Strategy for Objective Comparisons of Inverse Solutions
334
A Method for Locating Regions Containing Neural Activation at a Given Confidence Level from MEG Data
338
Generalized Wiener Estimation of Three-Dimensional Current Distribution from Biomagnetic Measurements
342
Localizing Dipoles: The Correlation Coefficient and the Goodness of Fit in Source Localization of Filtered Noise
346
Monte-Carlo Analysis and Confidence Region Ellipsoids for Equivalent Current Dipole Solutions to EEG/MEG data
350
Localization of Current Sources with Constraints of Solution Area
354
Source Localization by Genetic Algorithm
358
Optimization of Conductivity and Permeability Parameters for Brain, CSF, Skull and Scalp Using Implanted Sources in the Human Cranium
361
Modeling of Spreading Cortical Depression Using a Realistic Head Model
365
A Simulation Study on the Nature of Electrical Sources of the MCG
369
Global Optimization in the Localization of Brain Activity
373
Variable Resolution Electric-Magnetic Tomography
377
Spatio Temporal Distributed Inverse Solutions
381
Quantification of Deviations Between Spherical and Realistically Shaped Forward Models
385
The Influence of Holes in a Layer with Low Conductivity on the Potential and Magnetic Field
389
Estimation of Cardiac Sources on the Epicardium and Endocardium from Simulated and Measured MCG Data
393
Current Density Reconstructions Using the L1 Norm
397
Modelling Closed Surface Geometry for Skull and Torso Using Snapping
401
Locally Refined Head Geometries Used to Evaluate Spherical Model Accuracy
405
Mesh Refinement of Boundary Element Head Models in MEG Source Reconstructions
410
New Trends in Clinical Magnetocardiography
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