ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,551,178, issued on Feb. 17.
"Methods for angiography" was invented by William E. Butler (Bristol, R.I.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An angiogram is a study of blood vessels where an angiographic chemical contrast agent is injected while a sequence of images (typically x-rays) are obtained. The contrast pattern on the sequence of images provides information about the vascular anatomy and physiology. The discovery that contrast in blood vessels varies at cardiac frequency in magnitude and phase, which may be visualized as a spatiotemporal reconstruction of cardiac frequency angiographic phenomena, enables a set of processes for increasin...