Living State Physics At Vanderbilt University

6/2/00


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Table of Contents

Living State Physics At Vanderbilt University

Senior Faculty

Wikswo Group

Wikswo Group, Con’t

Biophysical Electrodynamics

The Heart is a…

Cardiac Electrodynamics

The cardiac membrane is a planar accelerator that uses gradients of 107 volts per meter to accelerate heavy ions to energies of 70 meV.

The Cardiac Bidomain Model

Modeling the Cardiac Bidomain

Four Modes of Cardiac Activation

Experimental Setup

Vanderbilt Cardiac Imaging System

Information from Imaging Data

Point-Electrode Excitation of Refractory Tissue

Synchronous Imaging of Point Activation Patterns

Cardiac Reentry

Initiation of Spiral Wave Reentry

Spiral Wave and Figure-of-Eight Reentry

Bidomain Anisotropies and the Critical Point Hypothesis

Initiation of Quatrefoil Reentry

Quatrefoil Reentry Predicted by the Bidomain Model

Optical Imaging of Quatrefoil Reentry

One Frame of Transmembrane Potential

Cardiac Non-Linear Dynamics

Transmembrane Potential - Phase

Functional Block is Characterized by Low-Amplitude Oscillation of Vm

Vector Calculus of Phase Currents

Phase Singularities in Cardiac Reentry

Quad2

SQUIDs for Biomagnetic Measurements

Gastrointestinal Smooth Muscle

61 Channel SQUID Study

GMF Vector Model

Gastric Propagation

Other Biomagnetic Measurements

Magnetic Imaging with SQUIDs

Superconducting Quantum Interference Device (SQUID) Magnetometers

SQUIDs for NDE

SQUID Measurements of Corrosion

Notes

NCI SQUID Drawing

NCI SQUID Picture

Microscope and SQUID Images

SQUID Imaging of Hidden Corrosion in 7075 Aluminum

SIMA vs. Time for Submerged 7075-T6

Three Models for Corrosion Currents That Produce Magnetic Fields

SQUID Microscopy

LTS-SQUID Microscope

LTS-SQUID chip design

SQUID I(V), V(f) characteristics

LTS- SQUID Field Sensitivity

Author: John P. Wikswo

HTS - SQUID microscope

Applications of SQUID Microscopes

Possible New Projects

Living State Physics Seal