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:
Jun. 19, 2007
Filed:
Sep. 04, 2002
Sylvain Justin Georges André Haupert, Bondy, FR;
Peter Maria Johannes Rongen, Eindhoven, NL;
Herman Stegehuis, Eindhoven, NL;
Sylvain Justin Georges André Haupert, Bondy, FR;
Peter Maria Johannes Rongen, Eindhoven, NL;
Herman Stegehuis, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to the field of digital subtraction angiography. An image processing method is applied to a digitized mask () and to a sequence of digitized opacified images (). A logarithmic function () is applied to the values of the pixels of the digitized mask and to the values of the pixels of the sequence of digitized opacified images, and then a subtraction () is made of the logarithmic value of each pixel of a digitized opacified image from the logarithmic value of the corresponding pixel in the digitized mask. In order to improve the quality of the images processed, a processing step () able to decrease certain pixel values of the digitized mask and of the digitized opacified images is applied before applying the logarithmic function.