Lesion Positioner for Particle Beam Therapy Alignment
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Solution Overview
Problem
Conventional treatment table systems are not suitable for particle beam therapy due to the fixed position of the radiation port, leading to low positioning accuracy when using diagnostic 3D imaging units for lesion positioning.
Innovation Solution
A treatment table system that includes a top board, a lesion positioner system for moving the top board to position the lesion to a virtual isocenter of the particle beam therapy system, and a treatment table moving mechanism to move the table between diagnosis and treatment positions while maintaining the lesion's state, allowing accurate positioning based on diagnostic imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a common treatment table is used for both diagnostic 3D imaging unit and particle beam therapy system, then the subject does not need to move between different treatment tables, but the positioning accuracy is low because the radiation port position is fixed and cannot be adjusted to align with the diagnostic imaging unit
Solution Approach 1:
The patent introduces a radiation port positioner that enables dynamic adjustment of the radiation port position along the patient's body axis. This allows the radiation port to be moved to different locations to align with the diagnostic 3D imaging unit's isocenter, thereby achieving high positioning accuracy while maintaining the use of a common treatment table for both diagnosis and therapy.
2Device complexity
If the radiation port position is fixed in the particle beam therapy system, then the system structure is simplified, but the system cannot be applied to positioning using diagnostic 3D imaging unit because the radiation port cannot be arranged arbitrarily
Solution Approach 1:
The radiation port positioner transforms the fixed radiation port into a dynamically adjustable component. The positioner allows the radiation port to be moved to different positions along the patient's body axis, enabling the system to adapt to the diagnostic 3D imaging unit's isocenter location while maintaining a relatively simple overall system structure.
Solution Approach 2:
The patent creates a universal treatment table system that can serve both diagnostic 3D imaging and particle beam therapy functions. By adding the radiation port positioner, the system gains the versatility to accommodate both types of equipment with a single treatment table, eliminating the need for separate treatment tables for diagnosis and therapy.
3Measurement precision
If the radiation port is positioned to align with the diagnostic 3D imaging unit isocenter, then high positioning accuracy is achieved, but the radiation port position must be adjustable rather than fixed
Solution Approach 1:
The radiation port positioner provides the necessary dynamic adjustment capability with minimal added complexity. The positioner mechanism allows precise movement of the radiation port along the patient's body axis to align with the diagnostic 3D imaging unit's isocenter, achieving high positioning accuracy while adding only the essential components needed for this specific function.
Data Source
AI summary
Lesion positioner systems and, which perform positioning of a lesion A by moving a top board for allowing a subject to be placed thereon, set an isocenter of a diagnostic 3D imaging unit as a virtual isocenter at the time when a treatment table is in a 3D imaging diagnosis position, and positions the lesion A to the virtual isocenter, based on a three-dimensional diagnostic image in consideration of particle beam therapy. A treatment table moving mechanism moves the treatment table to the treatment position relative to the particle beam therapy system while maintaining states of the top board and the lesion positioner systems and at the time of positioning, thereby positioning the lesion A to the isocenter of the particle beam therapy system.