|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).
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.
|3-D Reconstruction of Numerical Phantom
from six projective views, as shown above.
|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.