Patient specific biomodel of the whole aorta [Elektronisk resurs] the importance of calcified plaque removal

• Background: The use of anatomical models produced by 3D printing technique (rapid prototyping, RP) is gaining increased acceptance as a complementary tool for planning complex surgical interventions. This paper describes a method for creating a patient specific replica of the whole aorta. Methods: Computed tomography angiography (CTA) DICOM-data was converted to a three-dimensional computer aided design-model (CAD) of the inner wall of the aorta representing the lumen where the calcified plaque contribution was removed in a multi-step editing-manoeuvre. The edited CAD-model was used for creating a physical plaster model of the true lumen in a 3D-printer. Elastic and transparent silicon was applied onto the plaster model, which was then removed leaving a silicon replica of the aorta. Results: The median (interquartile range) difference between diameters obtained from CTA- and RP plaster-model at 19 predefined locations was 0.5 mm (1 mm) which corresponds to a relative median difference of 4.6% (7.0%). The average wall thickness of the silicone model was 3.5 mm. The elasticity property and performance during intervention was good with an acceptable transparency. Conclusions: The integration of RP-techniques with CAD based reconstruction of 3D-medical imaging data provides the needed tools for making a truly patient specific replica of the whole aorta with high accuracy. Plaque removal postprocessing is necessary to obtain a true inner wall configuration. 

Ämnesord

Engineering and Technology  (hsv)

Other Engineering and Technologies  (hsv)

Other Engineering and Technologies not elsewhere specified  (hsv)

Teknik och teknologier  (hsv)

Annan teknik  (hsv)

Övrig annan teknik  (hsv)

Engineering and Technology  (hsv)

Civil Engineering  (hsv)

Other Civil Engineering  (hsv)

Teknik och teknologier  (hsv)

Samhällsbyggnadsteknik  (hsv)

Annan samhällsbyggnadsteknik  (hsv)

Industrial Design  (ltu)

Industriell design  (ltu)

Drift och underhållsteknik  (ltu)

Operation and Maintenance  (ltu)