MicroRT-small animal conformal irradiator.

Area of Science:

• Medical Physics
• Radiation Oncology
• Small Animal Research

Background:

• Conformal radiation therapy (CRT) is crucial for precise tumor targeting.
• Small animal models are essential for preclinical radiation research.
• Existing systems may lack integrated imaging, planning, and precise positioning.

Purpose of the Study:

• To design and prototype MicroRT, a novel small animal conformal radiation therapy system.
• To integrate multimodality imaging, treatment planning, and CRT delivery.
• To validate the system's accuracy for radiobiological experiments.

Main Methods:

• Utilized a clinical 192Ir high dose rate source for teletherapy.
• Employed a Monte Carlo-based dose calculation algorithm for treatment planning.
• Integrated CT, MRI, or PET imaging with a custom treatment planning system (microRTP).
• Used precisely machined tungsten collimators and a computer-controlled stage for accurate beam delivery.
• Achieved submillimeter positioning accuracy.

Main Results:

• Successfully designed and prototyped the MicroRT system.
• Demonstrated integration of imaging, planning, and delivery.
• Validated submillimeter positioning accuracy.
• Presented hardware specifications and typical radiobiological experiment procedures.

Conclusions:

• The MicroRT system provides a novel, accurate platform for small animal conformal radiation therapy.
• It enables precise irradiation for advanced radiobiological studies.
• The system's integrated approach enhances the reliability of preclinical radiation research.