Heavy Particle Therapy Rotating Gantry Lateral Beam Control
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Solution Overview
Problem
Existing radiation therapy systems using heavy particles, such as protons, heavy ions, and pions, face challenges in delivering precise dosages due to their distinct behavior compared to photon-based systems, leading to inadequate treatment volumes and unintended harm to patients, as existing systems are not adaptable for these particles.
Innovation Solution
A method and apparatus that utilize a rotating source of heavy particles to expose a patient's treatment volume from various angles, employing lateral beam controllers and dynamic proton range adjusters to manage penetration range and intensity, accounting for the Spread-Out Bragg Peak characteristic, allowing for three-dimensional control and real-time adjustments during treatment sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy particles are used for radiation therapy, then the therapeutic effect is improved, but the system adaptability deteriorates because existing photonic radiation systems cannot be simply exchanged for heavy-particle sources
Solution Approach 1:
The patent introduces a treatment planning system as an intermediary that bridges heavy-particle therapy and existing photonic radiation delivery systems. This system calculates and generates treatment plans specifically optimized for heavy particles, which then guide the modified arc therapy delivery system, enabling the intermediary layer to translate between the different radiation modalities and resolve the adaptability issue.
Solution Approach 2:
The patent modifies the arc therapy delivery system to handle both photonic radiation and heavy particles through universal components. The delivery system is redesigned with multi-functional capabilities that can accommodate different particle types while maintaining the same fundamental delivery mechanism, thereby achieving universality across radiation modalities.
2Manufacturing precision
If heavy-particle source is rotated about the patient to expose treatment volume from various angles, then the dosage distribution is improved, but the device complexity increases
Solution Approach 1:
The patent leverages the existing rotating gantry infrastructure of arc therapy systems, which was originally designed for photonic radiation, and adapts it for heavy-particle delivery. By making the delivery system universal rather than building a completely new rotating heavy-particle source system, the patent achieves multi-angle exposure capability while minimizing the increase in device complexity.
3Manufacturing precision
If lateral beam controllers and dynamic proton range adjusters are used to control heavy particle beams, then the manufacturing precision of dosage delivery is improved, but the device complexity increases
Solution Approach 1:
The patent employs dynamic control mechanisms including lateral beam controllers and dynamic proton range adjusters that can be modified during treatment delivery. These dynamic systems allow real-time adjustment of beam parameters to achieve precise dosage distribution, with the control system adapting throughout the treatment process rather than being fixed in advance.
Solution Approach 2:
The patent utilizes parameter changes in the heavy-particle beam delivery by dynamically adjusting energy levels, beam intensity, and penetration range during treatment. The treatment planning system calculates optimal parameter sequences that account for the Spread-Out Bragg Peak characteristic, enabling precise dosage control through parameter modulation rather than complex mechanical adjustments.
4Measurement precision
If treatment plans account for penetration range and Spread-Out Bragg Peak characteristic, then the therapeutic precision is improved, but the measurement and detection difficulty increases
Solution Approach 1:
The patent implements preliminary treatment planning that calculates and accounts for penetration range and Spread-Out Bragg Peak characteristics before treatment delivery. The treatment planning system performs comprehensive simulations and calculations in advance, determining optimal beam parameters, angles, and sequences that will achieve the desired dosage distribution, thereby eliminating the need for complex real-time measurements during treatment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and flexible delivery of heavy particle beams for therapeutic purposes, improving dosage distribution and minimizing collateral damage by leveraging the unique characteristics of heavy particles, unlike traditional photon-based systems, with the ability to make sub-millisecond adjustments in intensity and beam control.
Implementation Method 1
Heavy particles (such as protons, heavy ions, antiprotons, and pions) behave considerably different than the photons of more traditional radiation sources such as x-rays
Implementation Method 2
accounting for the Spread-Out Bragg Peak characteristic, allowing for three-dimensional control and real-time adjustments during treatment sessions
Data Source
AI summary
A heavy-particle treatment system exposes a patient's treatment volume, during the course of a single treatment session, to beams of heavy particles from a variety of different angles. The source of heavy particles may rotate about the patient to facilitate that variety of different angles. The foregoing can occur pursuant to a treatment plan that accounts for a penetration range as corresponds to the beams of heavy particles and for using at least one lateral beam controlling device to control at least one of the beams of heavy particles.