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

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

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