Mailable TLD system for photon and electron therapy beams.

Area of Science:

• Medical Physics
• Radiation Oncology

Background:

• The need for accurate calibration of medical radiation beams is critical for effective cancer treatment.
• Established systems for monitoring photon and electron beam energies require regular validation.

Purpose of the Study:

• To detail the design, use, and calibration techniques of the mailable Transmission Line Detector (TLD) system.
• To assess the accuracy and precision of the TLD system for photon and electron beam calibration.

Main Methods:

• Description of the mailable TLD system developed by the Radiological Physics Center.
• Explanation of design considerations, proper usage, and calibration methodologies.
• Comparison of TLD system performance with ion chamber measurements in a water phantom.

Main Results:

• The TLD system has been operational for photon beam calibration since 1977 and electron beams since 1982.
• The system covers photon energies from cobalt 60 to 25 MV and electron energies from 6 to 20 MeV.
• TLD system accuracy is comparable to ion chamber measurements in a water phantom, but with lower precision.

Conclusions:

• The mailable TLD system provides a reliable method for monitoring medical radiation beam calibration.
• The system's accuracy supports its use in ensuring consistent and safe radiation therapy.
• While precise, the TLD system's accuracy makes it a valuable tool in radiological physics.