Automatic localization of curved wires used in brachytherapy. The COUREP program

Area of Science:

• Medical Physics
• Radiotherapy
• Image Analysis

Background:

• Brachytherapy source localization is crucial for accurate radiation delivery.
• The shift from radium to flexible Iridium-192 wires complicates 3D source reconstruction.
• Precise localization is essential for effective cancer treatment and minimizing side effects.

Purpose of the Study:

• To develop an automated program for reconstructing the 3D arrangement of brachytherapy wires.
• To address the challenges in localizing flexible Iridium-192 sources in brachytherapy implants.
• To provide a tool for accurate visualization of brachytherapy implants.

Main Methods:

• The COUREP program utilizes two orthogonal radiographs of the brachytherapy implant.
• It processes wire projections on each radiograph, extracting point coordinates.
• The program reconstructs the 3D spatial arrangement of the implanted wires.

Main Results:

• The COUREP program successfully reconstructs the 3D positions of curved brachytherapy wires.
• It provides 3D coordinates of points along the wires.
• Optional graphic output includes a perspective view of the implant, aiding visualization.

Conclusions:

• Automated 3D reconstruction of brachytherapy implants is feasible using orthogonal radiographs.
• The COUREP program offers an effective solution for localizing Iridium-192 wires.
• Accurate 3D reconstruction enhances treatment planning and delivery in brachytherapy.