Stereotactic Laser Ablation Fiber Control via MR Temperature Imaging
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Solution Overview
Problem
Current magnetic resonance guided laser ablation systems face challenges in controlling the movement and rotation of optical fibers within the skull, leading to complications such as trauma from bone screws, limited tissue ablation range, and inaccurate laser emission due to non-rigid fixation and rotation issues.
Innovation Solution
A magnetic resonance guided laser ablation treatment system incorporating a stereotactic driving system with a guide device, sleeve, connector, and rotation driving device to control the position and rotation angle of the ablation optical fiber, along with a workstation for real-time control and feedback using magnetic resonance temperature imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a head-mounted structure with auxiliary devices and bone screws is used to guide and control the optical fiber, then the optical fiber can be secured and structurally strengthened, but the structure becomes complicated and too heavy, causing trauma to patients and poor compliance
Solution Approach 1:
The patent removes the complex head-mounted auxiliary structure and bone screws, extracting only the essential guiding function. The optical fiber is guided through a simplified trajectory using minimal intervention points, eliminating the heavy and complicated mounting structure while maintaining sufficient structural support for accurate laser delivery.
2Ease of operation
If a head-mounted structure is used to guide the optical fiber, then the optical fiber can be controlled, but the structure occupies too large area and interferes with or severely limits implantation distances and planning of implantation sites
Solution Approach 1:
The patent divides the guidance system into multiple discrete segments or points along the implantation trajectory, rather than using a single large head-mounted structure. This allows the optical fiber to be controlled at specific intervals while minimizing the overall occupying area and avoiding interference with implantation distances and site planning.
3Temperature
If a cooling sleeve assembly is used for cooling, then the optical fiber can be cooled, but the assembly causes non-rigid fixation to the optical fiber, resulting in uncontrollable rotation and deviation of laser emission from the expected position
Solution Approach 1:
The patent employs a flexible cooling sleeve or thin-film cooling structure that maintains thermal contact with the optical fiber while allowing rigid fixation at the fixation point. This flexible design prevents unwanted rotation and deviation of the optical fiber, ensuring accurate laser emission positioning while still providing effective cooling.
4Volume of moving object
If multiple optical fibers are implanted for ablation of larger tissue range, then the ablation range can be increased, but the existing head-mounted structure severely limits implantation distances and makes it impossible to perform solutions for small implantation site distances
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement limited by the head-mounted structure to a three-dimensional implantation strategy. Multiple optical fibers can be implanted at various depths and angles within the target tissue volume, enabling comprehensive ablation coverage without being constrained by the occupying area of a head-mounted structure.
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 effective ablation of both regular and irregular tissues without additional skull-mounted structures, reducing patient trauma and improving implantation site flexibility, while maintaining accurate laser emission and minimizing tissue harm.
Implementation Method 1
a laser ablation apparatus, including a laser generator
Implementation Method 2
Laser exerts energy on a disease position and implements ablation for tissue
Implementation Method 3
a cooling device
Implementation Method 4
generate and display ablation information of the target region during the workflow of the magnetic resonance guided laser ablation treatment system by using magnetic resonance temperature imaging technology
Data Source
AI summary
A magnetic resonance guided laser ablation treatment system, including: an optical fiber cooling assembly (400), accommodating and cooling an ablation optical fiber (5); a laser ablation apparatus (200), including a laser generator and a cooling device; a stereotactic driving system (300), accommodating and controlling the position and angle of rotation of the ablation optical fiber (5); and a workstation (100), configured to control the movement of a stereotactic driving system, and generate and display ablation information of the target region during the workflow of the magnetic resonance guided laser ablation treatment system by using the magnetic resonance temperature imaging technology.