Image-Guided Microrobotic Devices with Partial Coating for Deep Tissue Navigation
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Solution Overview
Problem
Current biomedical imaging techniques, such as optical imaging, face limitations in deep tissue penetration due to strong optical scattering, while non-optical methods like X-ray CT and PET suffer from poor contrast and ionizing radiation, making it challenging to effectively navigate and control microrobots in vivo for precise drug delivery and microsurgery.
Innovation Solution
The development of image-guided microrobotic devices equipped with micromotors encapsulated in microcapsules, featuring a partial coating with imaging contrast agents and cargo, which utilize photoacoustic computed tomography (PACT) for navigation and near-infrared light-induced propulsion to achieve precise control and prolonged retention in targeted tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical imaging techniques are used for microrobot navigation, then imaging resolution is improved, but deep tissue penetration is limited due to strong optical scattering
Solution Approach 1:
The patent combines optical imaging (for high resolution) with photoacoustic imaging (for deep penetration) into a hybrid imaging system. The microrobots are equipped with both optical contrast agents and photoacoustic contrast agents, allowing simultaneous or sequential use of both imaging modes to overcome the limitations of each individual technique.
Solution Approach 2:
The microrobots are designed with multi-functional capabilities including dual-mode imaging (optical and photoacoustic), targeted drug delivery, and responsive cargo release. The partial coating structure serves multiple functions: providing imaging contrast, protecting the reactive core, and enabling controlled cargo release through selective disintegration.
2Length of stationary object
If X-ray CT or PET is used for deep tissue imaging, then deep tissue penetration is improved, but contrast resolution deteriorates and ionizing radiation exposure increases
Solution Approach 1:
The patent combines optical imaging (for high resolution) with photoacoustic imaging (for deep penetration) into a hybrid imaging system. The microrobots are equipped with both optical contrast agents and photoacoustic contrast agents, allowing simultaneous or sequential use of both imaging modes to overcome the limitations of each individual technique.
3Stability of the object's composition
If full coating is applied to reactive particles, then protection and stability are improved, but cargo release efficiency deteriorates due to blocked access
Solution Approach 1:
The patent applies partial coating rather than full coating to the reactive particles. This creates regions with different properties: some areas have coating for protection and imaging contrast, while other areas remain exposed or have reduced coating to allow reactant access and efficient cargo release. The coating is strategically placed to balance protection with functionality.
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 high-resolution, deep-tissue imaging and precise control of micromotors for drug delivery and microsurgery by overcoming the limitations of existing imaging techniques, with enhanced retention and efficient cargo delivery in vivo.
Implementation Method 1
utilize photoacoustic computed tomography (PACT) for navigation
Implementation Method 2
near-infrared light-induced propulsion
Implementation Method 3
Each micromotor comprises a reactive particle
Data Source
AI summary
Image-guided microrobotic systems, methods and methods that employ micromotor(s) having imaging agent(s) and cargo in a microcapsule, each micromotor having a partial coating over a reactive particle and/or asymmetrical geometry, when activated the microcapsule disintegrates releasing the micromotor(s) and active propulsion is generated when fluid contacts the reactive particle.