varvis: visualizing anatomical variation in branching structures

EuroVis 201618th EG/VGTC Conference on Visualization

6-10 June 2016, Groningen, the Netherlands

VarVis: Visualizing Anatomical Variation

in Branching Structures

Noeska Smit1, Annelot Kraima2, Daniel Jansma2, Marco DeRuiter2, Elmar Eisemann1 and Anna Vilanova1

1Delft University of Technology2Leiden University Medical Center

EuroVis 2016 Noeska Smit - VarVisEuroVis 2016

Brachydactyly Type D


Anatomical Variation

3

Vesalius, A. Fabrica, 1543 Thompson, A. Third annual report of the committee of the collective investigation of

the Anatomical Society of Great Britain and Ireland for the year 1891-92. J. Anat.

Physiol. 27: 183-194, 1893.


Anatomical Variation Example

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Relevance

• Correct diagnose and safe treatment

• For anyone performing interventional procedures:

• Radiologists

• Vascular surgeons

• Transplantation surgeons

• Neurosurgeons

• …

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Relevance

• What types of variations exist?

• How often do they occur?

• Similarity and differences amongst variations?

6


Current representation

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Current representation

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Glasser, S.T. An anatomic study of venous variations at the fossa ovalis.

Arch. Surg. 46:289-295, 1943.


Spot the differences?

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Improved visualization?

•Simple overlay?

•Summarize?

10


Why not graph theory?

•Represent branching structures as graphs

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Graph representation: tree

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Graph matching


Graph matching

• Label nodes based on endpoints they feed

• Traverse pair of trees from every endpoint to the root:

• If labels match: continue

• If labels do not match: merge nodes

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EuroVis 2016 Noeska Smit - VarVisEuroVis 2016 15

A

B

C

BC

ABC

A

B

C

Graph Matching

ABC ABC


Graph matching: summary tree

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Topology similarity measure

•Given two graphs, how similar is the topology?

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Source data: 15 variations

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Global view: Topology similarity

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Local view

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Local view

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VarVis

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Evaluation

• Three domain experts:

• Task performance

• User experience

• Improved task performance over illustrations alone

•Summary tree abstraction

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Conclusion

•VarVis: interactive application

visualizing anatomical

variations

• Future work:

build patient-specific graph

representations based on medical

imaging

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Thank you!

• http://medvis.org - the blog on all things medical visualization

25

@_Noeska_

@medvisorg

10903 High-

definition Atlas-

based surgical

planning for Pelvic Surgery

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varvis: visualizing anatomical variation in branching structures

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