Generation of arbitrary intensity profiles by dynamic jaws or multileaf collimators

Area of Science:

• Medical Physics
• Radiation Oncology
• Computational Imaging

Background:

• Accurate radiation dose delivery is crucial in cancer treatment.
• Generating specific intensity profiles requires precise control of radiation delivery devices.
• Existing methods may lack efficiency or adaptability for complex profiles.

Purpose of the Study:

• To develop and present an efficient algorithm for calculating collimator jaw motion.
• To enable the generation of arbitrary, piecewise linear intensity profiles.
• To account for the transmission properties of multileaf collimator (MLC) leaves.

Main Methods:

• An algorithm was developed to compute collimator jaw trajectories.
• The algorithm assumes piecewise linear intensity profiles.
• It incorporates unidirectional, continuous, and variable-speed jaw movements.
• The method considers MLC leaf transmission.

Main Results:

• The algorithm successfully calculates required collimator jaw motions.
• It can generate diverse and complex intensity profiles.
• Calculations are highly efficient, typically completed in under 10 milliseconds.
• The algorithm is applicable to multileaf collimators.

Conclusions:

• The presented algorithm provides an efficient and accurate method for radiation intensity profile generation.
• This facilitates precise dose delivery in radiation therapy.
• The algorithm's speed and adaptability make it suitable for clinical implementation with MLCs.