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:
Mar. 04, 2008
Filed:
Jun. 29, 2004
Thomas Köhler, Norderstedt, DE;
Michael Grass, Buchholz in der Nordheide, DE;
Thomas Köhler, Norderstedt, DE;
Michael Grass, Buchholz in der Nordheide, DE;
Koninklijke Philips Electronics, N.V., Eindhoven, NL;
Abstract
The invention relates to a method of reconstructing the current flow, or the bolus arrival times, in a vessel system. For the sections (i) of the vessel tree, bolus arrival times (m) are measured, for example in connection with an injection of contrast medium. Based on this measured data, linear programming is then used to calculate model bolus arrival times (t), which, on the one hand, through minimization of the function E=Σ|m−t|, are as close as possible to the measured data, and, on the other, by adherence to the boundary condition Δ=t−t≧0, ensure the monotony of the propagation, wherein p(i) is the index of the vessel section in front of vessel section (i). Preferably, as smooth as possible a progression is compelled by means of an additional minimization of E=Σ|t″|.