using 3d visualisation in the repair of intra-articular fractures

Using 3D Visualisation in the Repair of Intra-articular Fractures

Arline. F. WilsonDr. Peter. B. Musgrove

Dr. Gillian PearceDr. Kevan A. Buckley

Dr. John M. Geoghegan

Theory and Practice of Computer Graphics 2007

Derbyshire Royal Infirmary

Oswestry Orthopaedic Hospital


Research Problem

• Repair an intra-articular fracture with the smoothest articulating surfaces possible

• An intra-articular fracture is a break in the articulating surfaces of a joint

• Use 3D visualisation as a tool in providing pre-operative planning for surgery

• Data visualisation from CT scans are a non-invasive way of providing information

• Initial work is in 2D


2D Visualisation


http://www.tfl.gov.uk/assets/images/general/mapt-tube-standard-colourmap.gif


3D Visualisation

Knee Joint

(image created using AMIRA software)


Expected face afterCurrent face before

Medical Visualisation

(Images from The Times newspaper, November 2005)


Pre-operative planning


One year after

Surgery

http://www.breitbart.com/article.php?id=D8LM81E00&show_article=1


Three-dimensional solid from CT “slices”

Series of many two-dimensional images

combine in sequence to create a

three-dimensional solid

Object appears in each two-dimensional “slice”


Series of 2D images


Visualisation of CT data

View of bones

obscured by soft tissue


Image of fracture with no soft tissue visible


Edge Detection


Jigsaw Puzzle Matching


Rotate Blue Fragment


Do they match?


Exact Match


Automatically manipulate fragment to show match


Partial Match


Show where it

does not fit


No Match


Partial Match


Overlap/collision


Poor Match


Exact Match


Progress so far

• 3D visualisation of CT data– Amira– AVS/Express

• Some edge detection and collision detection work– Vb.Net

• 2D shape manipulation and matching– Java


Further Work

• Apply manipulation to 3D images– User interface views?– Manipulation control?

• Edge detection• Collision detection• Automatic segmentation• Can swelling and/or bleeding affect

the images?


Thank You.

Questions?


Partial Match


Poor Match


Partial Match


Acknowledgements

• Underground geographical maphttp://pauldwaite.co.uk/londonTubeMap/geoff-files/sillymaps/geographical_map.jpg

• More common maphttp://www.tfl.gov.uk/assets/images/general/mapt-tube-standard-colourmap.gif

• Face transplant images• The Times newspaper, November 2005• http://www.breitbart.com/article.php?id=D8LM81E00&show_article=1


Matrix Multiplication

• Angle of rotation is • Convert to radians = * / 180

1 0 0 cos() sin() 0 0 1 0 -sin() cos() 0 -x -y 0 0 0 1

using 3d visualisation in the repair of intra-articular fractures

Documents

soft tissueimage of

matchpartial matchshow

ct scans

ct slicesseries

surgery data visualisation

manipulation control

computed tomography

d imagesuser interface