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System and method for three-dimensional reconstruction of an artery

a three-dimensional reconstruction and artery technology, applied in the field of medical devices, can solve the problems of inability to accurately estimate the severity of the stenosis and its length from these images, the selection of these perspectives is partly arbitrary, and the overall number of images that can be obtained is limited by time, safety and cos

Inactive Publication Date: 2005-01-13
PAIEON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004] It is therefore an object of the invention to provide a more accurate process and system for computer reconstruction of an artery from discrete images of the artery.

Problems solved by technology

Selection of these perspectives is partly arbitrary and partly a process of trial and error once a stenosis has been observed.
However, the overall number of images that can be obtained is limited by time, safety and cost.
Since these projections are in general not perpendicular to the arterial axis, estimation of stenosis severity and its length from these images is usually not accurate.

Method used

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  • System and method for three-dimensional reconstruction of an artery
  • System and method for three-dimensional reconstruction of an artery

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Embodiment Construction

[0057] Referring first to FIG. 1, a cross section 100 of a stenotic artery is shown. The artery has a circular lumen that is partially occluded by plaque 105. In angiography, the unoccluded portion of the lumen 110, (indicated in FIG. 1 by cross-hatching) is filled with a radio-opaque substance. 115a and 115b are two longitudinal projections of the radio-opacity of the artery as would be obtained in angiography. The projections 115a and 115b are from orthogonal perspectives as indicated by the broken lines 120a and 120b. In the projection 115a the stenosis appears to be non-critical. The projection 115b, on the other hand, shows maximal narrowing of the arterial lumen indicating that the stenosis is in fact critical.

[0058] In FIG. 2, a block diagram of a preferred embodiment of the system of the invention is shown. An X-ray source 200 and an X-ray detector 205 are used to obtain angiographic images of an individual 210. An X-ray beam 212 is produced by the X-ray source 200 and is d...

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Abstract

A method and system for imaging an artery contained in an arterial tree. A microprocessor generates a three-dimensional reconstruction of the arterial tree from two or more angiographic images obtained from different perspectives. The orientation of the axis of the artery in the arterial tree is then determined, and a perspective of the artery perpendicular to the axis of the artery is determined. A three dimensional reconstruction of the artery from angiographic images obtained from the determined perspective is then generated.

Description

FIELD OF THE INVENTION [0001] The present invention relates to medical devices, and more specifically to such devices for use in angiography. BACKGROUND OF THE INVENTION [0002] Stenosis of an artery refers to narrowing of the artery lumen due to plaque formation on the interior wall of the artery. The severity of the stenosis is the fraction of the cross-sectional area of the lumen that is occluded by plaque. Since narrowing is often asymmetrical about the axis of the artery, in order to assess the severity of a stenosis, it is necessary to obtain at least two, and preferably more, images perpendicular to the artery axis from orthogonal perspectives. [0003] In angiography, the arterial lumen is filled with a radio-opaque substance and X-ray images of the arterial tree are obtained from different perspectives. Selection of these perspectives is partly arbitrary and partly a process of trial and error once a stenosis has been observed. However, the overall number of images that can be...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B6/02A61B6/00A61B8/06G06T1/00G06T11/00G06T17/40G06T19/20
CPCA61B6/504G06T2211/404G06T2219/2016G06T19/20Y10S128/922
Inventor EVRON, RAMIASSIS, TSURIELCARMIELI, RAN
Owner PAIEON INC
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