Radio-wave Responsive Doped Nanoparticles for Multi-modal Imaging and Ablation
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Solution Overview
Problem
Current radiofrequency ablation (RFA) techniques are limited in treating larger areas due to the size of lesions that can be effectively treated, which is typically restricted to 4 cm or less, and lack sufficient contrast for accurate tissue visualization under imaging guidance.
Innovation Solution
Development of radio-wave responsive nanoparticle formulations that provide simultaneous imaging and therapeutic capabilities, comprising an anion-cation complex configured to generate heat under RF exposure, offering T1 and T2 contrast for MRI, X-ray absorption for CT, near-infrared fluorescence for optical imaging, and nuclear imaging, while being doped with specific ions or organic molecules for enhanced visibility and therapeutic efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If radiofrequency ablation is used to treat larger areas, then the treatable area increases, but the lesion size that can be effectively treated remains limited to 4 cm or less
Solution Approach 1:
The patent divides the treatment approach by using multiple RF electrodes that can be positioned at different locations within the target tissue area. Each electrode creates its own ablation zone, and by segmenting the treatment into multiple overlapping zones, the overall treatable area exceeds the limitation of individual 4 cm lesions while maintaining effective ablation at each segment.
Solution Approach 2:
The patent employs expandable RF electrodes that can be nested within a delivery catheter for minimally invasive insertion, then expanded in situ to achieve larger treatment areas. The electrode structure itself can be nested or layered to create multiple ablation zones from a single insertion point, effectively overcoming the size limitation through spatial nesting.
2Area of stationary object
If repeated repositioning of RF electrodes is performed to cover entire disease area, then the treatable area increases, but the procedure complexity and time increase
Solution Approach 1:
The patent combines multiple RF electrode elements into a single integrated assembly that can be deployed together. This merging allows simultaneous creation of multiple ablation zones from one insertion procedure, eliminating the need for repeated repositioning of separate electrodes while still achieving coverage of the entire disease area.
Solution Approach 2:
The patent transitions from a single-point electrode approach to a multi-dimensional electrode array that can be deployed in three-dimensional space within the target tissue. By utilizing spatial dimensions (radial, axial, and angular arrangements), the system achieves comprehensive area coverage from a single insertion point, reducing procedural complexity.
3Measurement precision
If contrast enhancement is added to improve disease tissue visibility, then imaging accuracy improves, but the system complexity increases
Solution Approach 1:
The patent employs contrast agents with multi-functional properties that serve both as imaging contrast agents and as therapeutic components. For example, superparamagnetic iron oxide particles provide MRI contrast enhancement while also serving as heat-generating agents for RF ablation. This universality allows simultaneous achievement of imaging accuracy and therapeutic function without proportionally increasing system complexity.
Solution Approach 2:
The patent uses composite nanoparticle formulations that combine multiple functional materials into a single agent. These composites integrate contrast-enhancing materials (for MRI, CT, or optical imaging) with therapeutic materials (such as heat-generating or drug-delivery components), achieving enhanced imaging accuracy while simplifying the overall system by using a single multifunctional material rather than separate imaging and therapeutic agents.
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
These nanoparticles enable precise localization and ablation of disease cells, expanding the treatable area beyond 4 cm and providing multi-modal imaging capabilities for enhanced accuracy and effectiveness in treating cancer and other conditions.
Implementation Method 1
The complex is configured to generate heat under exposure to radiofrequency (RF) waves
Implementation Method 2
provide simultaneous T1 and T2 contrast under magnetic resonance imaging (MRI)
Implementation Method 3
provide X ray absorption for CT imaging
Implementation Method 4
provide near infrared (NIR) fluorescence for optical imaging
Data Source
AI summary
The invention discloses nanoparticles comprising compounds of calcium with anions such as phosphate, pyrophosphate, sulphate, silicate, carbonate, molybdate, or phosphosilicate that are doped with various ions. The nanoparticles are configured to produce heat (hyperthermia) under radio-wave (1 KHz-1000 GHz) exposure together with magnetism suitable for contrast imaging in MRI, X-ray absorption for computed tomography, near-infrared optical fluorescence for optical imaging, and/or radio-isotope emission for nuclear imaging or therapy. The nanoparticles can also be incorporated into micro-beads or other 3 dimensional scaffolds for image-guided (MRI, CT, NIR, nuclear) tissue regeneration, immunotherapy, vascular or tumor embolization, and/or chemo/radio-embolization.