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Updated: Jan 24, 2026
09:24
Micro 3D Printing Using a Digital Projector and its Application in the Study of Soft Materials Mechanics
Published on: November 27, 2012
25.9K
[Digital applicator by 3D printing in contact brachytherapy].
Summary
3D printing custom applicators for high dose rate brachytherapy improves skin conformation and treatment reproducibility. This innovative approach is feasible for complex skin tumors, enhancing radiation delivery accuracy.
Area of Science:
- Oncology
- Medical Physics
- Biomedical Engineering
Background:
- Traditional brachytherapy for skin tumors relies on manual applicator fabrication.
- Manual methods can lead to suboptimal skin conformation and variable treatment reproducibility.
Purpose of the Study:
- To present the technical implementation of 3D printing for custom high dose rate brachytherapy applicators.
- To evaluate the feasibility and outcomes of this method in the first two patients.
Main Methods:
- Custom digital applicators were designed using Rhinoceros 3D and Grasshopper software.
- 3D printing generated the custom applicators, followed by treatment planning using reverse optimization.
- A provisional and final scan were performed to ensure accurate applicator placement and treatment delivery.
Main Results:
- The 3D printed applicators were designed within 15 days.
- Treatment plans achieved target coverage criteria (D95) for both patients, with high conformity to the clinical target volume.
- Patient A received at least 35.4Gy (63Gy EQD2) to 95% of the CTV, and Patient B received at least 36Gy (64.8Gy EQD2).
Conclusions:
- Contact brachytherapy with 3D printing is a feasible technique for complex skin lesions.
- This method offers improved skin conformation and treatment reproducibility.
- The technique shows potential for broader application in other brachytherapy indications.
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