Congress:
EuroSafe Imaging 2016
Keywords:
Action 7 - Medical radiation protection research: MELODI, EURAMED, Action 9 - Facilitation of research in advanced topics of radiation protection
DOI:
10.1594/esi2016/ESI-0047
Description of activity and work performed
ContextVision’s GOPView iRV Family
ContextVision’s GOPView iRVultra product enables real-time (30 fps) image enhancement in interventional radiology.
It represents a new model of interventional radiology image enhancement with the ability to reduce noise and simultaneously preserve or enhance desired image features,
such as subtle pathology,
vessel edges,
stents,
catheter tips and guide wires in real time.
Since GOPView iRVultra uses an anisotropic (directional dependent) adaptive filtering on a pixel by pixel basis,
there is also no blurring or distortion of key pathology.
The success of this technology relies on GOP enhancement – an adaptive algorithm that mimics the human visual system in its method of finding information and analyzing structures,
enabling it to distinguish between true and false information (e.g.
noise,
artifacts).
Knowing that true structures are identified accurately,
filtering and enhancement can confidently be applied to each pixel.
This contextual information is then combined with ContextVision’s adaptive temporal filtering with advanced motion control,
which allows customized enhancement during different kinds of interventional procedures.
Dose Reduction in Real Time
As a result of improving overall clinical value by sharpening diagnostically significant images,
the GOPView iRV technology is uniquely capable of reducing the radiation dose previously necessary to achieve this level of image quality.
It allows users to work with lower dose,
to enhance the standard image,
or do a combination of both,
ultimately reducing the amount of exposure both doctors and patients must endure.
The implementation of the GOP enhancement software has been optimized for real-time processing,
without spatial or temporal blurring,
and critical subtle pathology is enhanced with an increase of feature definition and a concurrent reduction in unnecessary noise.
So,
at lower doses,
the increase in noise combined with the reduction in sharpness can be offset by the image enhancement done by the GOPView iRVultra product.
Figure 1: Right coronary arterial image
Example 1 illustrates a dose reduction (40 %) selective right anterior oblique (RAO) digital angiogram.
Left: original image at 40 % dose reduction.
Right: Enhanced image.
After enhancement,
all vessels are better outlined and there is very clear demarcation of the irregular luminal contour.