Dose Distribution Calculation for Particle Beam Therapy
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Solution Overview
Problem
Current particle beam therapy systems face challenges in efficiently measuring dose distributions at multiple points during patient QA, leading to increased treatment time and reduced patient capacity due to the limitations of traditional dosimeters and the need for high positional resolution detectors.
Innovation Solution
A dose distribution calculation device that calculates radiation dose distributions based on measured particle beam information, eliminating the need for high-resolution dose detectors and allowing for simultaneous multi-point measurements by storing and processing beam information from confirmative radiation on a phantom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional dosimeters are used to measure dose distribution at multiple points, then measurement accuracy is maintained, but treatment time increases and patient capacity decreases
Solution Approach 1:
The patent uses a detector array that captures dose distribution information from multiple points simultaneously through a single scanning irradiation, effectively creating a copied representation of the three-dimensional dose distribution without requiring multiple sequential measurements at each point
Solution Approach 2:
The patent transitions from measuring dose at single points sequentially (one-dimensional measurement approach) to capturing three-dimensional dose distribution information simultaneously using a detector array with multiple sensing elements arranged in space, adding spatial dimensions to the measurement capability
2Measurement precision
If high-resolution dose detectors are used to measure dose distribution, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent divides the detection function into multiple independent detector elements arranged in an array, where each element measures dose at its specific position, eliminating the need for a single complex high-resolution detector while achieving comprehensive spatial coverage through segmented measurement points
Solution Approach 2:
The detector array uses simple, standardized detector elements that can be replicated and arranged in various configurations to measure dose distributions for different treatment plans and scenarios, making the system universally applicable without requiring specialized high-resolution detectors for each application
3Loss of information
If multiple scanning irradiations are performed to measure doses at multiple points, then comprehensive dose distribution data is obtained, but treatment time increases
Solution Approach 1:
The patent merges multiple measurement functions into a single scanning irradiation event by using a detector array that simultaneously captures dose information from multiple spatial positions during one beam pass, consolidating what would otherwise require multiple separate irradiations into a single time-efficient measurement
Solution Approach 2:
The patent maintains continuous dose measurement throughout the scanning irradiation process by having detector elements continuously record dose information as the particle beam scans through the phantom, eliminating interruptions between measurements that would occur with sequential point-by-point measurement approaches
Data Source
AI summary
A dose distribution calculation device of the invention is characterized by including: a beam information storing unit (a measured energy storing unit, a measured electric-charge storing unit, a measured beam-central axis storing unit), in which, when particle beam information of a particle beam generated by a particle beam therapy system is measured by a measuring device in confirmative radiation in which the particle beam is radiated to a phantom as a substitute for a treatment target, the thus-measured particle beam information is stored; and a total dose calculation unit for calculating a radiation dose distribution (a total dose distribution) on the basis of the measured particle beam information (a measured energy, a measured beam quantity (a measured number of electric charges), a measured position of beam central axis).