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Computer graphic techniques for study of temporal and spatial relationships of multidimensional data derived from biplane roentgen videograms with particular reference to cardioangiography

1972; Elsevier BV; Volume: 5; Issue: 4 Linguagem: Inglês

10.1016/0010-4809(72)90069-9

1090-2368

James F. Greenleaf, Erik L. Ritman, Craig M. Coulam, Ralph E. Sturm, Earl H. Wood,

Cardiovascular Health and Disease Prevention

Abstract Orthogonal diameters of roentgen silhouettes of a test object (balloon) were measured automatically on each of about 80 video lines comprising its biplane images recorded 60 times/sec along with intraballoon pressure, P(t), during its distention with a roentgendense liquid at a known rate and volume. The balloon's surface was calculated from these data plus regional volumes, V(L,), circumferences, C(L, t), stresses, P(t) × C(L, t), and strains, ΔL L , and their derivatives. Spatial surfaces of the balloon with superposed isovalue lines and continuous surface displays of the interrelationships of these functions were generated. These multidimensional data-dense images can be photographed or recorded on a video disk for dynamic analysis during forward or reverse variable time-base and stop-action replays. Sequential 60/sec images derived from angiograms of the left ventricle with superposed isoparameter lines along with other hemodynamic variables illustrate the capability of detailed operator-computer interactive analysis of the spatial and temporal interrelationships of the various determinants of cardiac function.