Alternative solution of virtual biomodeling based on CT-scans.

This study presents a novel method for transforming CT-scan data into 3D biomodels by using computer-aided design (CAD) software. The process involves converting CT scans into a format compatible with 2D CAD tools, then using 3D CAD tools to generate detailed virtual models of individual bones.

Methodology for Converting CT-Scan Data to 3D Biomodels

• The first stage of the process involved conversion of the CT-scan data, in this case of an equine spine, into a TIFF format. This format was chosen because it is compatible with the 2D CAD program used in the study.
• Next, the researchers manually outlined the bony structures within the CT-scan using closed splines. This was done to demarcate the areas that would later be transformed into 3D biomodels.
• These outlined structures were then saved as IGS files, a format compatible with the 3D CAD software used in this study. This process prepared the data for the subsequent 3D modelling process.

Creating Biomodels with 3D CAD Software

• Once the data had been processed, the different layers of the CT-scans were correctly positioned using the 3D CAD software. This involved ensuring the layers were at the correct distance from each other to accurately represent the real-life structure of the bones.
• After positioning, a closed surface was created to contain all the spline-curves. This formed the exterior of the bone model.
• The final step of the process was to fill the exterior of the model with a material to create a solid part, thereby finalizing the 3D biomodel.

Advantages and Applications

• This alternative method is particularly useful in cases where access to CAD software is exclusive. The process of converting CT scans into a format that can be used with CAD tools provides a flexible option for biomodel creation.
• An additional advantage of this method is its ability to add extra artificial spline-curves, which is especially beneficial if it is necessary to separate two or more bones that have grown together unnaturally. Using 3D CAD software, this composite model can be accurately separated into individual structures.