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Vascular roadmapping

A roadmap and vascular technology, applied in cardiac catheterization, image enhancement, image analysis, etc., can solve problems such as suboptimal masking, temporal instability, and complexity

Active Publication Date: 2012-07-11
KONINKLIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, this segmentation process is complex and often (if not always) produces very suboptimal masks (incomplete vessels or over-segmentation, artifacts, temporal instability)

Method used

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Examples

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Embodiment Construction

[0060] figure 1 Typical results obtained with conventional cardiac roadmapping techniques are shown, where a previously recorded angiographic image is overlaid on a live fluoroscopy image including a portion 220 of the instrument.

[0061] figure 2 The flowchart in is illustrating the principle of vessel roadmapping according to the present invention, which includes the following steps. It will be understood that the steps described for the method are main steps, wherein these main steps may be distinguished or divided into several sub-steps. Also, there may be sub-steps between these main steps. Thus, a sub-step is mentioned only if it is important for understanding the principle of the method according to the invention.

[0062] In step S1 an angiographic image or images are generated. As mentioned previously, the image or images generated in step S1 may also be contrast-enhanced images, such as atrial or ventriculograms.

[0063] In step S2 (following step S1 ), the d...

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Abstract

Cardiac roadmapping consists in correctly overlaying a vessel map sequence derived from an angiogram acquisition onto a fluoroscopy sequence used during PTCA intervention. This enhanced fluoroscopy sequence however suffers from several drawbacks such as breathing motion, high noise level, and most of all suboptimal contrast-enhanced mask due to segmentation defaults. This invention proposes to reverse the process and to locally overlay the intervention device as seen in fluoroscopy onto an optimal contrast-enhanced image of a corresponding cycle. This drastically reduces or suppresses the breathing motion, it provides the high image quality standard of angiograms, and avoids segmentation defaults. This proposal could lead to a brand new navigation practice in PCI procedures.

Description

technical field [0001] The present invention relates to methods and devices for vascular roadmapping. In particular, the present invention relates to methods for visualizing instruments in anatomical parts. Furthermore, the invention relates to a corresponding system and computer program. Background technique [0002] After the catheter has been inserted into the vasculature at the access site, the catheter is advanced along the large vessel to the vasculature requiring treatment. A contrast agent is injected through the catheter and an x-ray apparatus in the catheterization laboratory records an angiographic sequence showing vessels filled with contrast agent. This diagnostic angiogram acquisition can be repeated with varying imager geometries. Diagnosis and intervention planning are based on this diagnostic angiogram. [0003] During an intervention, a flexible, partially or fully radiopaque guidewire is advanced to the affected vascular structure (eg, a stenosis in a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00A61B6/12G06T7/00
CPCG06T2207/10081A61B6/486A61B6/481G06T2207/10121G06T2207/30021G06T7/0012G06T2207/20144A61B6/12A61B6/504A61B6/5235A61B6/488A61B6/503G06T5/50G06T2207/30101A61B6/02A61B6/4441G06T7/194
Inventor R·弗洛朗P·勒隆
Owner KONINKLIJKE PHILIPS NV
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