Use the external radiotherapy StarTrack detector to study the electron beam profile

Area of Science:

• Medical Physics
• Radiation Oncology
• Quality Assurance

Background:

• Accurate electron beam dosimetry is critical for effective radiotherapy.
• The StarTrack two-dimensional array is a tool for quality assurance in radiation therapy.

Purpose of the Study:

• To evaluate the electron beam dose verification capabilities of the StarTrack detector.
• To assess the reliability and stability of the StarTrack array for quality assurance.

Main Methods:

• A cross-sectional study was conducted using the StarTrack detector.
• Measurements were performed on a 12MeV electron beam at specified field sizes (6cm×6cm, 14cm×14cm) and depth (1.5cm).
• Testing followed the International Electrotechnical Commissioning protocol.

Main Results:

• Significant differences in dose were observed between field sizes (p<0.05).
• Beam profile parameters (penumbra, flatness, symmetry) were within acceptable limits.
• The output dose curve exhibited instability in the crossline for both field sizes.

Conclusions:

• The measured output dose for 12MeV electron beams exceeded established tolerance levels.
• Corrections are necessary before patient treatment to ensure accurate radiation delivery.