166Ho-coated balloon for vascular brachytherapy.

Area of Science:

• Nuclear Medicine
• Biomedical Engineering
• Interventional Cardiology

Background:

• Conventional angioplasty balloons can rupture, risking radioactive material release.
• Radiation exposure to medical staff is a concern during brachytherapy procedures.
• Optimizing radioactive isotope delivery for therapeutic applications is crucial.

Purpose of the Study:

• To develop a novel surface coating procedure for 166Ho on angioplasty catheters.
• To enhance the radiation dose delivery efficiency of 166Ho-coated catheters.
• To improve the safety profile of radioactive catheter applications.

Main Methods:

• A simple coating procedure was developed for 166Ho.
• Surface coating was applied to conventional percutaneous transluminal coronary angioplasty balloon catheters.
• Leakage tests were performed to assess the stability of the coating.

Main Results:

• The surface-coated catheter delivered twice the absorbed dose compared to a solution-filled catheter with the same 166Ho activity.
• Leakage tests demonstrated that less than 0.6% of the coated 166Ho activity was removable.
• The coated catheter design mitigates the risk of 166Ho release due to balloon rupture.

Conclusions:

• The developed 166Ho surface coating procedure offers a safe and effective method for brachytherapy.
• This technique enhances radiation dose delivery and significantly reduces risks associated with radioactive material leakage.
• The improved safety profile benefits both patients and healthcare professionals by minimizing radiation exposure.