Aims and objectives
In this poster we present our experiences and findings in using curved multi-planar reformat (CMPR) in neurovascular interventional treatment,
such as aneurysm treatment by either (stent-supported) coiling,
or flow diverting stents.
The CMPR visualizations were applied inthe assessment of device deployment,
such as stents,
in contrast enhanced high-resolution cone-beam CT (VasoCT).
Methods and materials
Curved multi-planar reformat
Curved multi-planar reformat (CMPR) visualization can be used torepresent vascular structures without foreshortening,
by fitting a curved plane through the vascular centerline,
and depicting this plane on a straight surface [1,2,3].
The vessel can be visualized either whilemaintaining the in-plane curvature (Figure 1),
or completely straightened (Figure 2).
The advantages of thisrepresentation are:
There are no overlapping structures.
There is no foreshortening,
whichbenefits measurements and observations.
The vessel (and all contained entities,
such as intra-vascular devices,
etc) can be evaluated...
For vessels with a certain degree of curvature,
it becomes impossible to view the entire vessel lumen in a thin traditional MPR slice,
as can seen below.Also rotating along the center line is a very cumbersome task for such traditional MPR sliced views of curved vessels.
The CMPR technique alows to inspect the vessel lumen along its entire legnth at once,
as shown below (for the same stent).
It can be easily rotated around its center line.
In this case the...
The CMPR visualizations have been found to be easier to use than the MPR visualizations (average of 1.8 vs.
2.8 on a 5 point scale,
lower is better),
while also scoring betteron assessment of stent apposition (average of 1.3 vs.
it can be concluded that the CMPR visualizationsare considered a valuable tool during the assessment of device deployment in interventional vascular treatment.
Fred van Nijnatten,
Image Guided Therapy,
Bicêtre University hospital Paris
Department of NRI
rue du Général Leclerc
94275 Le Kremlin Bicêtre,
"CPR - Curved Planar Reformation",
in Proceedings of IEEE Visualization 2002
Carroll: "On-line multi-slice computed tomography interactive overlay with conventional X-ray: A new and advanced imaging fusion concept",
International Journal of Cardiology 133(3): e101-e105,
"Curved Planar Reformatted CT Angiography: Usefulness for the Evaluation...