Radiation Treatment Trajectory Planning for Precise Dose Placement
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Solution Overview
Problem
Current radiation therapy systems face challenges in accurately delivering radiation to tumor sites while minimizing damage to surrounding healthy tissue, as existing methods lack precision in controlling dose placement and beam trajectory.
Innovation Solution
A radiation system and method that includes a radiation source and patient support system, allowing the radiation source to rotate and translate around the patient, with a control system for optimizing gantry angles and beam delivery, using fluence maps and machine parameters to determine a treatment plan that ensures precise dose delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radiation beams are delivered from fixed positions, then treatment delivery is simple, but dose distribution precision to tumor while sparing healthy tissue is insufficient
Solution Approach 1:
The patent implements dynamic beam delivery where the radiation source rotates around the patient on a gantry system, and the patient support table can translate and rotate. This dynamic positioning allows the radiation beams to be delivered from multiple angles and positions, enabling precise dose distribution to the tumor while minimizing exposure to surrounding healthy tissue. The system transitions from static to dynamic beam delivery to achieve superior dose conformity.
Solution Approach 2:
The patent adds spatial dimensions to beam delivery by allowing the radiation source to rotate around the patient (adding angular dimension) and the patient support to translate along the beam axis (adding positional dimension). This multi-dimensional positioning capability enables the system to deliver radiation from numerous different angles and distances, creating complex dose distributions that precisely target the tumor while sparing healthy structures.
2Adaptability or versatility
If radiation source and patient support are positioned around same spatial region, then beam delivery flexibility is improved, but collision risk between components increases
Solution Approach 1:
The patent incorporates a collision detection system that continuously monitors the positions of the radiation source, gantry, and patient support table. The system uses feedback from position sensors to detect potential collisions before they occur and automatically adjusts the treatment trajectory to avoid collisions. This real-time feedback mechanism allows the system to maintain high flexibility in beam delivery while ensuring safe operation.
Solution Approach 2:
The system performs preliminary collision detection and trajectory optimization before treatment begins. The treatment planning software calculates the entire treatment trajectory in advance, identifying and resolving potential collision points before the actual treatment delivery. This preliminary action ensures that the flexible multi-position beam delivery can be executed safely without component collisions.
Data Source
AI summary
A radiation system includes a radiation source, and a patient support for supporting a patient, the patient support located adjacent to the radiation source such that the radiation source can deliver radiation towards the patient while the patient is supported on the patient support, wherein the patient support and the radiation source are positionable at least partially around a same spatial region. A system for use to determine a treatment plan includes a user interface for allowing a user to define a plurality of control points, a first parameter, and a second parameter, wherein the user interface also allows the user to prescribe which of the first and second parameters is to be optimized, and which of the first and second parameters is to be interpolated.