John Allen Carroll
Dentist at Dry Crk Cir, Littleton, CO

6501848, Dec 31, 2002

Nov 20, 1999

09/444138

John Carroll - Littleton CO
Shiuh-Yung James Chen - Denver CO

University Technology Corporation - Boulder CO

G06K 900

382128, 382285, 434272

A method for in-room computer reconstruction of a three-dimensional (3-D) coronary vascular tree from routine biplane angiograms acquired at arbitrary angles and without using calibration objects. The method includes seven major steps: (1) acquisition of two standard angiogram sequences by use of a single-plane or biplane imaging system, (2) identification of 2-D coronary vascular trees and feature extractions including bifurcation points, directional vectors, vessel centerlines, and construction of vessel hierarchy in the two images, (3) determination of transformation in terms of a rotation matrix R and a translation vector {right arrow over (t)} based on the extracted vessel bifurcation points and directional vectors, (4) establishment of vessel centerline correspondence, (5) calculation of the skeleton of 3-D coronary vascular trees, (6) rendering of 3-D coronary vascular tree with associated gantry angulation, and (7) calculation of optimal view(s) and 3-D QCA as quantitative measures associated with the selected vascular segment(s) of interest. The calculation of optimal views includes determination of 2-D projections of the reconstructed 3-D vascular tree so as to minimize foreshortening of a selected vascular segment, overlap of a selected vascular segment or both overlap and foreshortening of a selected arterial segment.

7113623, Sep 26, 2006

Oct 8, 2002

10/267151

Shiuh-Yung James Chen - Englewood CO, US
John D. Carroll - Littleton CO, US

The Regents of the University of Colorado - Boulder CO

G06K 9/00, G06T 15/00, G09G 5/02, A61B 5/02

382128, 382154, 345419, 345589, 600500, 600508

Methods and systems for reconstruction of a three-dimensional representation of a moving arterial tree structure from a pair of sequences of time varying two-dimensional images thereof and for analysis of the reconstructed representation. In one aspect of the invention, a pair of time varying arteriographic image sequences are used to reconstruct a three-dimensional representation of the vascular tree structure as it moves through a cardiac cycle. The arteriographic image sequences maybe obtained from a biplane imaging system or from two sequences of images using a single plane imaging system. Another aspect of the invention then applies analysis methods and systems utilizing the three-dimensional representation to analyze various kinematic and deformation measures of the moving vascular structure. Analysis results may be presented to the user using color coded indicia to identify various kinematic and deformation measures of the vascular tree.

8463014, Jun 11, 2013

Jun 18, 2007

12/305989

Babak Movassaghi - Denver CO, US
Onno Wink - Denver CO, US
Shiuh-Yung James Chen - Englewood CO, US
Joel Alberto Garcia - Denver CO, US
John D. Carroll - Littleton CO, US

The Regents of the University of Colorado, a body corporate - Denver CO
Koninklijke Philips Electronics N.V. - Eindhoven

G06K 9/00

382132, 382128, 382130

A method for determining an optimal trajectory for 3-dimensional rotational X-ray coronary angiography for a C-arm X-ray system that has at least two degrees of freedom, where the C-arm X-ray system is defined by a rotational movement of the C-arm expressed in a left/right coronary artery oblique angle, and a roll motion of the C-arm expressed in a caudal/cranial angle. The method includes generating of a 3-dimensional representation of a center-line of a body vessel in a region of interest. generating at least one optimal view map. Further, an optimal trajectory for the X-ray system within the optimal view map is determined, where an optimal trajectory is at least determined by movements of the C-arm within its two degrees of freedom allowing image projections with minimal foreshortening and/or overlap while minimizing an exposure to X-rays.

2014001, Jan 16, 2014

Dec 13, 2011

13/990905

Anne Morawski Neubauer - Denver CO, US
Willem Frederik Den Hartog - Singapore, SG
John Dougher Carroll - Littleton CO, US
Onno Wink - Seattle WA, US
Geert Antonius Franciscus Schoonenberg - Boekel, NL
Shiuh-Yung James Chen - Englewood CO, US
Michael Grass - Buchholz in der Nordheide, DE

KONINKLIJKE PHILIPS ELECTRONICS N.V. - Eindhoven

G06T 11/00

345427

A system and method is described by which so-called standard angiographic views can be generated using a 3-or 4-D reconstructed image of the object of interest. One preferred example is the reconstruction of coronary angiograms from rotational angiography sequences. Once the 3D image is created, it can be forward projected into the user-defined “standard” views for live presentation during the procedure. It is anticipated that these standard views, which more closely mimic what a physician is accustomed to see, will be more readily accepted by the interventional community.