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Keywords:
Arteriovenous malformations, Aneurysms, Stents, Computer Applications-3D, Angioplasty, Image manipulation / Reconstruction, CT-High Resolution, Cone beam CT, Vascular, Neuroradiology brain, Interventional vascular
Authors:
D. Ruijters1, F. van Nijnatten1, T. Grünhagen1, J. Moret2, L. SPELLE2; 1Best/NL, 2Paris/FR
DOI:
10.1594/ecr2017/C-0908
Methods and materials
Curved multi-planar reformat
Curved multi-planar reformat (CMPR) visualization can be used to represent 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 while maintaining the in-plane curvature (Figure 1),
or completely straightened (Figure 2).
The advantages of this representation are:
- There are no overlapping structures.
- There is no foreshortening,
which benefits measurements and observations.
- The vessel (and all contained entities,
such as intra-vascular devices,
calcified plaque,
etc) can be evaluated along its entire length at once.
Evaluation method
Twelve illustrative patients were selected to retrospectively assess the CMPR visualization method.
On all patients a high resolution cone-beam CT (VasoCT,
Philips Healthcare,
Best,
the Netherlands) was acquired immediately after device deployment [4,5].
The evaluation of the CMPR visualization was performed using these VasoCT datasets.
To this means the devices depicted in the VasoCT data were first evaluated in traditional multi-planar reformats (MPR),
and consequently using the CMPR method.
The resulting visualizations were scored on:
- Ease-of-use
- Assessment of stent apposition
The scoring was done using a 5 point scale,
whereby 1 represented the best score and 5 corresponded to the worst score:
- excellent
- very good
- good
- fair
- poor