Biomodelling Using Rapid Prototyping

Dr. Ian Gibson

Centre for Advanced Product Development Technologies (CAPDT)

Dept. Mechanical Engineering

The University of Hong Kong

Slice data

• Medical data often generated in slices (CT, MRI)

• RP data converted into slices

Segmentation of CT scan data, Materialise, Belgium

Form (model visualisation)

Chromosome modelling, Finland

Child’s skull, Leeds Univ.

Form and fit (remodelling)

Osteotomy planning of recosntruction for Goldenhar syndrome patient, Dr. B. Vanassche, Belgium

Fit (assemblies)

Hip replacement, Leeds University, UK

Skull plate, QMI, Australia

Function (actual parts)

Custom inplants, Innova, US

Artificial ears, QMI, Australia

Other related applications

Paleontology - Juvenile Diprotodontid Skull BioModel, QMI, Australia Legal - personal injury,

malpractice- cracked skull, Innova, US

Informed consent, arteries at the base of brain, QMI

Projects at HKU

Development of an artificial finger joint

Distracter

The use of RP models in oral and maxillofacial surgery

Intelligent Interpretation of CT Contour Data

Set of CTimages

ContoursExtracted

ReconstructedSolid Model

ImageProcessing:1.FuzzyMultilevelThresholding2.MorphologicalEdge detection3. Small voidremoval4.Knowledge-base artifactsremoval5.Boundariesrectifaction

3D Reconstruction:1.DelaunayTriangulation

Summary

• A range of facilities at HKU, ME Dept. for biomodelling

• Started looking drug delivery devices and tissue engineering

• Product development (i.e. ideas into practice)

• Particularly suitable to surgical applications