[A method for measuring the isocentre positional accuracy of X knife system]

Area of Science:

• Medical Physics
• Radiotherapy Technology
• Image Analysis

Context:

• Accurate patient positioning is critical for effective radiation therapy.
• The X Knife system requires precise mechanical isocenter positional accuracy for safe and effective treatment.
• Existing methods for assessing isocenter accuracy may have limitations.

Purpose:

• To introduce and validate a novel film-concentric circle method for measuring the mechanical isocenter positional accuracy of the X Knife system.
• To provide a reliable and accessible technique for quality assurance in stereotactic radiosurgery.
• To enhance the precision of radiation delivery in X Knife therapy.

Summary:

• A film-concentric circle method was developed to measure mechanical isocenter positional accuracy.
• A simulation ball and collimator were imaged to create concentric circles on film.
• The distance between the centers of these circles quantifies the isocentric system error.

Impact:

• This method offers a straightforward and effective approach to quality assurance for the X Knife system.
• Improved accuracy in mechanical isocenter positioning can lead to enhanced treatment efficacy and reduced side effects.
• The technique contributes to the overall safety and reliability of advanced radiation therapy delivery.