Patent · US Expired

Reconstruction of the current flow in a vessel system

US7340026B2 · kind B2 · utility

4Cited by

1References

10Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Thomas Kohler · Neuenstadt am Kocher, DE
Michael Grass · Hanstedt, DE

Key dates

Filing date	Jun 29, 2004
Grant date	Mar 4, 2008
Priority date	—
Expiry date	Aug 13, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S378/901
WIPO fieldMedical technology
WIPO sectorInstruments

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 (mi) 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 (ti), which, on the one hand, through minimization of the function E=Σ|mi−ti|, are as close as possible to the measured data, and, on the other, by adherence to the boundary condition Δi=ti−tp(i)≧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 Em=Σ|ti″|.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.