Implementation of a Stereoscopic Camera System for Clinical Electron Simulation and Treatment Planning

Area of Science:

• Medical Physics
• Radiation Oncology
• Medical Imaging

Background:

• Clinical electron simulations traditionally require dedicated time slots on linear accelerator (LINAC) machines.
• Inefficiencies in simulation workflows can impact patient treatment scheduling and resource allocation.
• The development of advanced imaging systems offers potential solutions for optimizing radiation therapy planning.

Purpose of the Study:

• To evaluate the implementation and efficiency of a 3D stereoscopic camera system (.decimal) for clinical electron simulations.
• To assess the accuracy of treatment parameters determined by the 3D system compared to standard delivery methods.
• To transition electron simulation workflows out of the LINAC vault, freeing up machine time.

Main Methods:

• A 3D stereoscopic camera system (Decimal3D scanner) was used for patient surface scanning and treatment area contouring.
• Gantry, couch, collimator, and source-to-surface distance (SSD) parameters were determined for electron beam en face entry.
• Data from 73 treatment sites were analyzed to compare scanner-determined beam parameters with actual treatment delivery parameters.

Main Results:

• Clinical electron simulations for 73 sites, primarily keloids, were successfully moved out of the LINAC vault.
• The Decimal3D scanner determined all necessary machine parameters (gantry, collimator, couch, SSD) and cone sizes.
• No scanner-derived plan was untreatable due to cutout shape or clearance issues, and setup accuracy was maintained within updated tolerance tables.

Conclusions:

• The 3D stereoscopic camera system effectively transitioned clinical electron simulations out of the LINAC vault.
• The workflow demonstrated no loss of setup accuracy in machine parameter determination and electron cutout shape.
• This technological integration enhances efficiency in radiation oncology planning and delivery.