GE Healthcare
StentViz
Enhanced Stent Visualization
Dr. Morice, Dr. Lefèvre,
Dr. Hovasse, Dr. Chevalier,
Dr. Louvard
Institut Cardiovasculaire
Paris Sud, Massy, France
Assessing the deployment of stents during angioplasty procedures is critical for minimizing the risk of future adverse events.
But accurately assessing stent deployment, or gauging stent placement in relation to existing stents, can be highly challenging with conventional fluoroscopic imaging.
Latest stent designs, low metal content, bio-degradable materials, steep angulations and fast stent motion can all obscure stent visibility.
Innova® with StentViz provides exceptional stent visualization, with easy, one-button activation.
StentViz potentially helps you to:
•Enhance stent visibility and visualization to assess stent deployment.
•Position stents more precisely with respect to existing stents.
•Accurately evaluate stent overlap in cases of in-stent restenosis, long lesions or bifurcation stenting.
•Increase clinical confidence with immediate and routine control of stent deployment.
•Save time and money by choosing the right stenting strategy to avoid additional procedures and patient re-treatment.
StentViz
Fully automated processing
A visualization tool for easily assessing stent positioning and deployment, StentViz is a perfect fit within your cathlab workflow. It automatically improves the image quality of stents from cine X-ray acquisitions.
Unlike other technologies, StentViz detects automatically both the guidewire and the marker balls to perform an elastic registration that allows to compensate for non rigid stent deformation.
In addition, StentViz detects and removes radio-opaque objects for optimal stent visibility and robust performance.
Markers & guide |
Elastic |
Temporal |
Zoom & contrast |
wire detection |
registration |
integration |
optimization |
Automatic detection |
Compensate |
Cumulate information |
Subtract background |
on each image |
for non rigid motion |
into a single image |
and enhance stent |
technology
Elastic registration technique One touch activation
Stent enhancement techniques are based on motion compensated temporal integration of the stent images. The motion of the stent is classically inferred from
the motion of the highly contrasted balloon marker balls.
StentViz detects and tracks the guide-wire between the markers and uses it to predict the deformation of the stent. The elastic curve-based registration technique accounts better for the guide-wire and stent deformation, thus avoiding potential blurring linked to rigid registration.
Fast and easy to use, StentViz is fully automated to fit into your interventional workflow. From a cine X-ray acquisition an enhanced StentViz image is instantly generated at the press of a button.
•A cardiac record run with approximately 30 frames is acquired with the balloon and marker balls in place.
•Press the StentViz key in the exam room or in control room.
•The enhanced StentViz image appears within thirty seconds.
•If the enhanced stent image is non-optimal, you can choose a frame and zoom to re-launch the processing.
•StentViz image is stored as a DICOM image for review and archiving.
Step A - Acquisition of several images of the same stent
Image M |
Image N |
Image O |
Step B - Registration of all stent images |
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StentViz |
Other technologies |
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Elastic registration |
Marker based |
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Optimal registration: |
registration |
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based on marker balls |
Suboptimal registration: |
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and the guide wire |
based on marker only. |
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(GE patent application). |
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