Features of 2Day.QA® as a 2D radiation dosimeter

Area of Science:

• Medical Physics
• Radiation Dosimetry

Background:

• Quality assurance (QA) in radiotherapy is critical for patient safety and treatment efficacy.
• Accurate and reliable dosimetry is essential for precise radiation delivery.
• Existing dosimetry methods may have limitations in terms of environmental impact or ease of use.

Purpose of the Study:

• To introduce the basic functions and capabilities of a new commercial 2D ionising radiation dosimeter, 2Day.QA®.
• To evaluate the performance and stability of the 2Day.QA® dosimeter for radiotherapy applications.

Main Methods:

• The 2Day.QA® dosimeter, composed of a polysaccharide and radiation-active substances, was irradiated using radiotherapy sources.
• Dose analysis was performed using Vidar® Red LED Dosimetry Pro Advantage™, Vidar® VXR 12-plus™, and HP Scanjet G3010 scanners.
• Stability testing and exemplary QA applications, including accelerator light/radiation field coincidence and brachytherapy source positioning, were conducted.

Main Results:

• The dosimeter demonstrated a quasi-linear dose response below 20 Gy, with a detection range from 0.95 Gy to over 94.9 Gy.
• The Vidar® Red LED Dosimetry Pro Advantage™ scanner was found to be superior for dose effect determination.
• The non-irradiated dosimeter remained stable for at least 18 months, retaining its functionality after storage.

Conclusions:

• The 2Day.QA® dosimeter exhibits significant potential for 2D radiation dosimetry in clinical settings.
• The study recommends the use of 2Day.QA® for various radiotherapy quality assurance tests.
• The environmentally friendly composition and demonstrated stability support its adoption in radiotherapy QA protocols.