Collimation system for spatially segmented radiotherapy and method for controlling a multi-slit collimator

The collimation system with adjustable multi-slit collimators generates customizable moiré patterns for spatially fractionated radiation therapy, addressing the limitations of current systems by efficiently tailoring treatment to individual patient needs and minimizing healthy tissue damage.

JP2026523134APending Publication Date: 2026-07-13AARHUS UNIV
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Patent Information

Application Number
JP2025571409
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-22
Filing Date
2024-06-20
Publication Date
2026-07-13

AI Technical Summary

Technical Problem

Current spatially fractionated radiation therapy systems using metal collimators are not easily customizable and require costly, time-consuming configurations for each patient.

Method used

A collimation system employing two multi-slit collimators with a controller to adjust the relative slit orientation, creating customizable moiré patterns for tailored radiation therapy by rotating one collimator relative to the other, allowing for efficient and inexpensive adaptation to individual patient needs.

Benefits of technology

The system enables rapid customization of radiation therapy, minimizing healthy tissue damage by creating non-uniform dose patterns, reducing side effects, and effectively targeting tumors with minimal collateral impact.

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Abstract

This disclosure relates to a collimation system for a radiotherapy system, the collimation system comprising: a first multislit collimator having a plurality of first parallel slits, the first multislit collimator being adapted to be installed between a radiation source and an object; a second multislit collimator having a plurality of second parallel slits, the second multislit collimator being adapted to be installed between the first multislit collimator and an object; and a controller for maintaining and adjusting the relative slit orientation between the plurality of first parallel slits of the first multislit collimator and the plurality of second parallel slits of the second multislit collimator by rotating at least one of the first multislit collimator and the second multislit collimator around a beam axis between the radiation source and the object. This disclosure further relates to a radiotherapy system and a method for controlling a multislit collimator in a radiotherapy system.
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