Coil Positioning System for Radiation Therapy Magnet
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Solution Overview
Problem
The movement of magnets, particularly during rotation, can cause unintended displacement of coils, affecting the magnetic field's magnitude and shape, which is critical in applications like radiation therapy where accuracy is paramount.
Innovation Solution
A system comprising a magnet with one or more coils and actuators that physically move the coils to compensate for displacement, using sensors to detect movement and processing devices to adjust the coil position, ensuring a stable magnetic field distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the magnet is moved or rotated to change orientation, then the magnet can be positioned to affect radiation output to different targets, but the coils experience unintended displacement that affects magnetic field magnitude and shape
Solution Approach 1:
The system transitions from a static coil support to a dynamic active compensation system. Sensors detect coil displacement caused by magnet movement, and actuators dynamically adjust coil positions in real-time to maintain precise alignment with the magnetic field isocenter, enabling both magnet repositioning and coil stabilization
Solution Approach 2:
The system implements a closed-loop feedback mechanism where sensors continuously monitor coil position relative to the magnetic field isocenter, and this position information feeds back to the control system which actuates the actuators to correct any displacement, ensuring precise coil positioning is maintained despite magnet movement
2Adaptability or versatility
If the magnet is moved or rotated, then different treatment targets can be accessed, but the magnetic field distribution becomes unpredictable due to coil displacement
Solution Approach 1:
The system enables dynamic adaptation where the coil positioning system actively compensates for magnet movement, maintaining reliable magnetic field distribution across different treatment configurations. The real-time adjustment capability ensures field predictability regardless of magnet orientation
Solution Approach 2:
Through continuous sensor monitoring and feedback control, the system maintains reliable magnetic field distribution by detecting coil displacement and automatically correcting it, ensuring treatment precision is preserved across all magnet positions and orientations
3Ease of operation
If small coil movements occur during magnet rotation, then the magnet can be repositioned, but the magnetic field magnitude and shape are affected
Solution Approach 1:
The active compensation system dynamically counteracts small coil displacements that occur during magnet repositioning, using actuators to maintain coil alignment precision and thereby preserving magnetic field accuracy while enabling easy magnet repositioning
Solution Approach 2:
The feedback control system detects small coil displacements during magnet rotation and automatically actuates correction mechanisms, ensuring that magnetic field accuracy is maintained despite the ease of magnet repositioning
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
This solution ensures accurate and predictable magnetic field adjustments, maintaining the integrity of the magnetic field distribution even during magnet movement, thereby enhancing the precision of applications such as radiation therapy.
Implementation Method 1
one or more coils to conduct current to generate a magnetic field
Implementation Method 2
The actuator may comprise a differential screw that connects to the strap
Data Source
AI summary
An example system includes: a magnet including one or more coils to conduct current to generate a magnetic field, with the magnetic field to affect output of radiation to a target; and one or more actuators, with an actuator among the one or more actuators being at least part of a physical coupling to the one or more coils, and with the actuator being controllable to move the one or more coils via the physical coupling based on movement of the magnet.