A Study of Feasibility for Reusing Thermoplastic Masks - Toward a Green Environment

Area of Science:

• Radiation Oncology
• Medical Device Engineering
• Sustainable Healthcare Practices

Background:

• Thermoplastic masks are crucial for patient immobilization in radiation therapy.
• Current practices involve single-use masks, contributing to environmental waste and increased healthcare costs.

Purpose of the Study:

• To evaluate the feasibility of reusing thermoplastic masks in radiation oncology.
• To assess the dimensional stability and structural integrity of masks after molding and re-flattening.
• To determine the potential for cost reduction and waste minimization through mask reuse.

Main Methods:

• The study involved 70 thermoplastic masks of three types: 3-clamp brain, 5-clamp head-and-neck, and 4-clamp chest/abdomen/pelvis.
• Mask dimensions were measured in superior-inferior (SI) and lateral directions before molding, after molding, and after re-flattening post-treatment.

Main Results:

• Brain masks showed significant expansion post-molding and contraction after re-flattening, with acceptable dimensional changes.
• Head-and-neck masks exhibited moderate expansion and enlargement after re-flattening.
• Chest/abdomen/pelvis masks showed minimal dimensional changes post-molding.

Conclusions:

• Thermoplastic masks can be reused with acceptable dimensional changes and maintained structural integrity.
• Single reuse of thermoplastic masks offers a viable option for reducing costs and environmental waste in radiation oncology.
• This practice supports the development of sustainable healthcare solutions, especially in resource-limited settings.