The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 1984
Filed:
Oct. 14, 1981
E Barrie Hughes, Redwood City, CA (US);
Edward Rubenstein, Hillsborough, CA (US);
Robert Hofstadter, Stanford, CA (US);
The Board of Trustees of the Leland Stanford Junior University, Palo Alto, CA (US);
Abstract
Non-invasive angiography is provided through use of monochromatized synchrotron radiation in a dichromographic procedure. A small quantity of an iodinated compound is introduced into the blood stream of a patient. An X-ray picture of a blood vessel such as the coronary artery can be produced by directing synchrotron radiation from a storage ring source at first and second selected wavelengths or energy levels through the blood vessel, detecting the attenuated radiation to obtain first and second signals representative of the attenuated radiation, and logarithmically subtracting the two signals to essentially eliminate all background contrast. Due to the K-absorption edge of iodine the resulting signal will emphasize the blood vessel containing the iodine.