Treating Recurrent Brain Metastases Using GammaTile Brachytherapy: A Case Report and Dosimetric Modeling Method.

Area of Science:

• Neurosurgery
• Radiation Oncology
• Medical Physics

Background:

• Recurrent brain metastases pose a significant clinical challenge, often requiring multimodal treatment strategies.
• Surgical resection combined with intracranial brachytherapy is an established option for managing these lesions.
• Cesium-131 (¹³¹Cs) based brachytherapy offers a unique radiobiological profile for targeted radiation delivery.

Observation:

• This report details a case of recurrent brain metastases treated with GammaTile (GT), a novel brachytherapy device.
• The GammaTile device utilizes ¹³¹Cs seeds embedded in a collagen carrier, designed for targeted intraoperative radiation therapy.
• The case involved a patient with previously treated brain metastases who experienced recurrence.

Findings:

• The study demonstrates the successful application of GammaTile for treating recurrent brain metastases.
• A key contribution is the presentation of a dosimetric modeling method specific to the GammaTile device.
• Dosimetric analysis is crucial for optimizing radiation dose distribution and treatment efficacy.

Implications:

• This case highlights the potential of GammaTile as a treatment option for recurrent brain metastases.
• The developed dosimetric modeling method can aid clinicians in planning and delivering precise radiation doses.
• Further research and clinical studies are warranted to establish the long-term efficacy and safety of this approach.