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Personalized 3D printed coronary models in coronary stenting
Zhonghua Sun1, Shirley Jansen2,3,4,5
1Discipline of Medical Radiation Sciences, School of Molecular and Life Sciences, Curtin University, Perth, Western Australia, 6845, Australia.
Quantitative Imaging in Medicine and Surgery
|September 28, 2019
Summary
3D printed coronary models enable accurate stent visualization and measurement, improving coronary CT angiography protocols. This technology aids in assessing stent placement and lumen visibility, potentially reducing invasive procedures.
Area of Science:
- Cardiovascular Imaging
- Medical Device Technology
- Biomedical Engineering
Background:
- 3D printing shows promise in cardiovascular disease, primarily for pre-surgical planning and education.
- Limited research exists on using 3D printed models for simulating coronary stenting procedures.
- This study investigates stent lumen visibility in patient-specific 3D printed coronary models.
Purpose of the Study:
- To evaluate stent lumen visibility in 3D printed coronary models using various post-processing techniques.
- To determine the accuracy of stent diameter and lumen measurements from different CT image reconstructions.
- To assess the feasibility of using 3D printed models for coronary stenting simulation.
Main Methods:
- Six coronary stents were placed in three patient-specific 3D printed coronary models.
- CT scans were acquired using a dual-source CT scanner and reconstructed with soft (Bv36) and sharp (Bv59) kernels.
- Images were analyzed using 2D axial, maximum-intensity projection (MIP), 3D volume rendering, and 3D virtual intravascular endoscopy (VIE).
Main Results:
- Stent lumen visibility varied from 54% to 97% depending on location.
- 3D volume rendering provided more accurate stent diameter measurements compared to 2D axial and MIP images.
- Sharp kernel (Bv59) improved stent lumen visibility over the smooth kernel (Bv36) (P=0.01).
- 3D VIE offered clear intraluminal visualization of stents and coronary walls.
Conclusions:
- 3D printed coronary models are feasible for simulating coronary stenting and optimizing CT angiography protocols.
- Further research with diverse stent sizes is needed to reduce reliance on invasive angiography for surveillance.
