Nanoparticle-Enhanced Electrical Impedance Tomography for Tumor Imaging
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Solution Overview
Problem
Current imaging techniques for tumors, such as MRI, CT, and PET, are expensive, non-portable, and use ionizing radiation, making them unsuitable for early-stage tumor detection and defining tumor boundaries, especially for asymptomatic screening.
Innovation Solution
The method involves using nanoparticles targeted to tumor biomarkers and detecting them with multi-frequency Electrical Impedance Tomography (EIT), which provides a more accurate image of tumors without ionizing radiation and is portable and cost-effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If MRI, CT, or PET is used for tumor imaging, then imaging quality and resolution are improved, but cost increases and portability decreases
Solution Approach 1:
The patent replaces complex mechanical imaging systems (MRI, CT) with an electrical field-based EIT system. By using electrical impedance measurements and mathematical reconstruction algorithms, the system achieves tumor imaging capability without requiring large-scale mechanical equipment, thereby improving portability while maintaining imaging functionality.
Solution Approach 2:
The patent introduces electrical impedance as an intermediary parameter to infer tumor location and characteristics. Instead of directly imaging tissue structure, the system measures electrical impedance changes caused by tumors and reconstructs images mathematically, enabling simpler, more portable imaging equipment.
2Measurement precision
If MRI, CT, or PET is used for tumor imaging, then imaging quality is improved, but cost increases
Solution Approach 1:
The patent employs disposable or reusable electrode arrays that can be manufactured at low cost compared to MRI/CT scanners. The electrode-based measurement system requires minimal infrastructure, enabling deployment in resource-limited settings while providing functional tumor imaging capability.
Solution Approach 2:
By substituting expensive mechanical imaging systems with electrical measurement and computational reconstruction, the patent dramatically reduces equipment cost while maintaining tumor detection capability through impedance-based imaging.
3Measurement precision
If CT or PET is used for tumor imaging, then imaging capability is improved, but harmful radiation effects increase
Solution Approach 1:
The patent replaces ionizing radiation-based imaging (CT, PET) with non-ionizing electrical impedance measurements. By using electrical fields to probe tissue properties and reconstruct images, the system eliminates radiation exposure while maintaining tumor imaging capability.
Solution Approach 2:
The patent converts the typically harmful effect of electrical fields into a beneficial diagnostic tool. By using safe, low-intensity electrical currents to measure impedance variations, the system transforms what could be a harmful exposure into a harmless measurement modality for tumor detection.
4Device complexity
If conventional EIT is used for tumor detection, then portability and cost are improved, but measurement precision deteriorates
Solution Approach 1:
The patent performs preliminary actions by injecting contrast agents or using multi-frequency measurements before image reconstruction. These preparatory steps enhance the impedance contrast between tumor and healthy tissue, improving boundary definition and measurement precision in the final reconstructed images.
Solution Approach 2:
The patent changes measurement parameters by using multi-frequency electrical impedance spectroscopy instead of single-frequency measurements. By measuring impedance across multiple frequencies, the system extracts more information about tissue properties, improving tumor boundary definition and characterization while maintaining portability.
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 approach enables early detection of tumors and localization of metastases with enhanced accuracy, using nanoparticles that can be designed to deliver cytotoxic drugs and exploit the permeability of tumor vasculature, providing a non-invasive, low-cost, and radiation-free imaging solution.
Implementation Method 1
targeting nanoparticles to a tumour and detecting the location of the nanoparticle using electrical impedance tomography
Implementation Method 2
Electrical Impedance Tomography (EIT) is an imaging technique in which an image of the conductivity or permittivity of a part of a body is inferred from surface electrical measurements
Implementation Method 3
Conducting electrodes are attached to the skin of the subject and small alternating currents applied to some or all of the electrodes. The resulting electrical potentials are measured
Implementation Method 4
exploit the permeability of tumor vasculature
Data Source
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AI summary
The use of nanoparticles for imaging a tumour in a mammal using electrical impedance tomography. The nanoparticles comprise a core of metal and/or semiconductor atoms to which are linked ligands that comprise a molecule capable of attaching to a specific tumour biomarker.