MRI-Compatible Robotic Manipulator for Deep Brain Stimulation
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Solution Overview
Problem
Current surgical procedures for Deep Brain Stimulation (DBS) lack accuracy due to registration errors and tissue deformation, leading to potential neurological complications and inefficiencies, as existing MRI-guided systems are not economically viable or practical for real-time, high-resolution imaging within a closed MRI environment.
Innovation Solution
A modular robotic system with MRI-compatible actuators and linkages, controlled by a central unit that processes sensor information and generates driving signals for precise electrode placement under real-time MRI guidance, allowing for accurate and efficient DBS procedures with minimal interference to MRI image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual stereotactic insertion is used for DBS electrode placement, then the procedure can be performed with existing equipment, but accuracy is limited by registration errors and brain movement during surgery
Solution Approach 1:
The system implements real-time MRI imaging during the procedure to continuously monitor electrode position and provide feedback to the control system. This allows dynamic adjustment of the robotic manipulator to maintain accurate electrode placement despite brain movement or registration errors, directly resolving the contradiction between measurement precision and reliability.
2Measurement precision
If real-time high-resolution MRI guidance is implemented, then electrode placement accuracy improves, but system complexity and cost increase significantly
Solution Approach 1:
The system merges the robotic manipulator, real-time MRI scanner, and control computer into an integrated system where components share resources and coordinate functions. The robotic arm is designed to be MRI-compatible and can be positioned within the scanner bore, while the control system processes MRI data to guide manipulator movements, achieving high precision without proportionally increasing overall system complexity.
Solution Approach 2:
The robotic manipulator is designed with multi-functionality to perform various neurosurgical procedures including DBS electrode insertion, biopsy, and other brain interventions. The system can accommodate different surgical tools and end-effectors, making the complex infrastructure applicable to multiple procedures and justifying the investment through versatility.
3Measurement precision
If a closed-bore high-field MRI scanner is used for real-time imaging, then image quality improves, but patient access and surgical tool insertion become difficult
Solution Approach 1:
The robotic manipulator is designed to nest within the closed-bore MRI scanner structure. The manipulator can be inserted through the scanner bore to reach the patient's head, while the MRI scanner maintains its closed-bore configuration for optimal imaging. This nested arrangement allows both high-resolution imaging and surgical access without compromising either function.
Solution Approach 2:
The system utilizes the vertical dimension by positioning the robotic manipulator to approach the patient from above through the open top of the scanner bore, rather than requiring lateral access. The manipulator can move vertically and position the electrode insertion point at the top of the patient's head, effectively using the third dimension to resolve the access conflict in the constrained scanner environment.
4Adaptability or versatility
If multiple procedures are performed with dedicated systems, then each procedure can be optimized, but cost and setup time increase
Solution Approach 1:
The robotic manipulator is designed as a universal platform that can perform multiple neurosurgical procedures including DBS electrode insertion, stereotactic biopsy, and other brain interventions. The system maintains procedure-specific optimization through programmable control and interchangeable end-effectors while eliminating the need for separate dedicated systems, thereby reducing setup time and resource allocation requirements.
Data Source
AI summary
A system and method for image guided assisted medical procedures using modular units, such that a controller, under the direction of a computer and imaging device, can be utilized to drive and track low cost, purpose specific manipulators. The system utilizes modular actuators, self tracking, and linkages. The systems can be optimized at a low cost for most effectively performing surgical procedures, while reusing the more costly components of the system, e.g. the control, driving, and tracking systems. The system and method may utilize MRI real time guidance during the above procedures.