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- P R Johnston, David Kilpatrick
- Journal of biomechanics
- 1991

A mathematical model of flow through an irregular arterial stenosis is developed. The model is two-dimensional and axi-symmetric with the stenosis outline obtained from a three-dimensional casting ofâ€¦ (More)

- P R Johnston, R.M. Gulrajani
- IEEE Transactions on Biomedical Engineering
- 1997

Computing the potentials on the heart's epicardial surface from the body surface potentials constitutes one form of the inverse problem of electrocardiography. An often-used approach to overcomingâ€¦ (More)

- Barbara M. Johnston, P R Johnston, David Kilpatrick
- Annals of Biomedical Engineering
- 2006

This paper describes a multi-electrode grid, which could be used to determine cardiac tissue parameters by direct measurement. A two pass process is used, where potential measurements are made,â€¦ (More)

- Barbara M. Johnston, P R Johnston, David Kilpatrick
- Mathematical biosciences
- 2006

This paper presents a mathematical model and new solution technique for studying the electric potential in a slab of cardiac tissue. The model is based on the bidomain representation of cardiacâ€¦ (More)

- P R Johnston, David Kilpatrick
- Mathematical biosciences
- 1999

A concentric bipolar electrode (CBE) (consisting of a central disc and an outer annulus) has been proposed as an approximate method of measuring the surface Laplacian of the body surface electricalâ€¦ (More)

- P R Johnston, Steven J. Walker, Jari Hyttinen, David Kilpatrick
- Mathematical biosciences
- 1994

The inverse problem of electrocardiography, the computation of epicardial potentials from body surface potentials, is influenced by the desired resolution on the epicardium, the number of recordingâ€¦ (More)

- J. P. Barnes, P R Johnston
- Mathematical biosciences
- 2012

This numerical study uses a simple bidomain model of cardiac tissue to compare the effect of three different ischaemic region geometries (rectangular, cylindrical and semi-ellipsoidal) on theâ€¦ (More)

- P R Johnston, David Kilpatrick
- Mathematical biosciences
- 1995

Sixteen anatomically correct bodies have been studied to determine the performance of the inversion techniques of zero-order Tikhonov regularization and singular value decomposition. The bodies haveâ€¦ (More)

- P R Johnston
- IEEE Transactions on Biomedical Engineering
- 1996

Presents a method to solve the inverse problem of electrocardiography using the Laplacian of the body surface potentials. The method presented is studied first using trade-off curves from aâ€¦ (More)

- P R Johnston
- 2007

Synopsis: Spatial science is an approach to human geography formulated in the 1950s-1970s as a response to perceived inadequacies in the then prevailing regional paradigm. It emphasises the study ofâ€¦ (More)