Cyber Technology, Inc.

Image Acquisition, Reconstruction, and Presentation


All renditions (C) Wolfram R. Jarisch, 1993


Validating 3-D Blush-Imaging with Numerical Simulations, Overview

This work was supported in part by NIH grant 1R 43 HL 50187-01, June-November  1993



Numerical Model of Myocardium and Coronary Arteries. The model is built from two components: the "coronary arteries" (red lines) and the "myocardium" (white, hollow mass).
Myocardium+Arteries
Pre-Processing of Projection Images. The myocardial model shown above allows the computation of 2-D "x-ray" projection images. In oder to reconstruct the myocardium free of (major) artifacts the portions attributed to the projection of the coronary arteries is removed and replaced with an estimate of the underlying myocardial density.

Advanced methods of artifact identification, delineation, and vessel extraction is shown in human data.
Projections
3-D Reconstruction of Numerical Phantom from six projective views, as shown above.
Myocardium Reconstruction
Study of uneven density distribution may allow to assess "region-at-risk." Two conditions are examined: the visibility of a region with 50 percent reduction of density (reduced blush; see dent in the reconstruction to the right) and an epi-endo-myocardial gradient.

Results of 3-D reconstructions for a canine preparation (control) is visualized in a cut-away view throughout the cardiac cycle.

3-D reconstruction of a canine preparation with perturbed blush shows the ability to localize
deficient contrast dye flow in vivo.
RegionAtRisk



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