PMC6710409_01
Screenshot of post-processing in 3-Matic. This software was used to cut the myocardium model in such a way that the VSDs could be visualized clearly. The two parts of the model were then printed separately, but fitted together cleanly (A-C). The blood pool model (D) was also post-processed in 3-Matic and, while cuts were not required for this model, a 2:1 scale model was produced. The black arrow in (A) indicates one of the VSDs and the red arrow in (D) a coronary artery.
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F1
In consultation with the imaging pediatric cardiologist, a cut was performed virtually such that the final myocardium model would be divided in two parts, the two parts being approximately three quarters and one quarter of the model (Figures 1A-C). In addition, there was concern over the location of the coronary arteries, so a point was made to segment these and ensure that they could be printed accurately (Figure 1D).
Photographs of the final models, with a measuring tape to demonstrate size. (A) The finished blood pool model at 1:1 size. (B) The 2:1 sized blood pool model, both produced in Formlabs White resin. Myocardium models were produced in Formlabs White resin (C) and using the polyjet printer in Agilus30 (D).
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F2
The resulting models made from this scan are shown in Figure 2.
Model produced from later CT scan shortly before surgery. Screenshot from Materialize 3-Matic showing how the model would be cut (Upper and Lower portions), and demonstrating the tricuspid valve (arrow).
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F3
The model was then cut as shown in Figure 3 to facilitate viewing.