Interactive Manipulation of Contour Data Using the Layers Program - User Guide|
School of Computing Technical Report, S.G. Parker, C.R. Johnson. No. UUCS-94-014, University of Utah, 1994.
Computational Engineering and Science at the University of Utah|
C.R. Johnson, P. Alfeld. In IEEE Computational Science and Engineering, pp. 7--9. 1994.
Visualization of 3-D wave prorogation in the heart - a new technique|
H.W. Shen, P.B. Gharpure, C.R. Johnson. In IEEE Engineering in Medicine and Biology Society 16th Annual International Conference, IEEE Press, pp. 684--685. 1994.
Map3d: Interactive Scientific Visualization for Bioengineering Data|
R.S. MacLeod, C.R. Johnson. In Proceedings of the IEEE Engineering in Medicine and Biology Society 15th Annual International Conference, IEEE Press, pp. 30--31. 1993.
The Body Electric|
C.R. Johnson, R.S. MacLeod, M.A. Matheson, C. Zimmerman. In Discover Magazine, pp. 72--77. February, 1993.
Visualization of Bioelectric Fields|
R.S. MacLeod, C.R. Johnson, M.A. Matheson. In IEEE Computer Graphics and Applications, Vol. 14, pp. 10--12. Jul, 1993.
Computer Simulations Reveal Complexity of Electrical Activity in the Human Thorax|
C.R. Johnson, R.S. MacLeod, M.A. Matheson. In Computers in Physics, Vol. 6, pp. 230--237. May/June, 1992.
Visualization of cardiac bioelectricity --- a case study|
R.S. MacLeod, C.R. Johnson, M.A. Matheson. In IEEE Visualization `92, pp. 411--418. 1992.
Visualization Tools for Computational Electrocardiology|
R.S. MacLeod, C.R. Johnson, M.A. Matheson. In Visualization in Biomedical Computing, pp. 433--444. 1992.
A Computer Model for the Study of Electrical Current Flow in the Human Thorax|
C.R. Johnson, R.S. MacLeod, P.R. Ershler. In Computers in Biology and Medicine, Vol. 22, No. 5, Elsevier BV, pp. 305--323. 1992.
Electrocardiography has played an important role in the detection and characterization of heart function, both in normal and abnormal states. In this paper we present an inhomogeneous, anisotropic computer model of the human thorax for use in electrocardiography with emphasis on the calculation of transthoracic potential and current distributions. Knowledge of the current pathways in the thorax has many applications in electrocardiography and has direct utility in studies pertaining to cardiac defibrillation, forward and inverse problems, impedance tomography, and electrode placement in electrocardiography.
Keywords: scalar field methods, vector field methods, tensor field methods, cardiac heart, scientific visualization
Computer Models for Calculating Transthoracic Current Flow|
C.R. Johnson, R.S. MacLeod. In IEEE Engineering in Medicine and Biology Society 13th Annual International Conference, IEEE Press, pp. 768--769. 1991.