Stabilized Gold Nanoparticle Contrast Agent for CT Imaging
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Solution Overview
Problem
Current X-ray computed tomography (CT) imaging using iodinated agents faces limitations in resolution for early cancer detection, causes allergic reactions, and has inadequate tissue retention for continuous monitoring, leading to unsuitable imaging of specific tissue regions and renal function concerns.
Innovation Solution
The use of stabilized and functionalized gold nanoparticles as contrast agents, which can be retained in tissues for extended periods, providing enhanced contrast and allowing for repeated imaging without frequent agent reintroduction, and can be targeted to specific tissue regions using biomolecules like bombesin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If iodinated agents are used as contrast enhancers, then image contrast is improved, but tissue retention time is insufficient
Solution Approach 1:
The patent changes the chemical composition parameter from iodinated agents to gold nanoparticles, which fundamentally alters the retention characteristics while maintaining contrast enhancement capability. The gold nanoparticles exhibit prolonged tissue retention due to their unique pharmacokinetic properties and stabilization mechanisms.
Solution Approach 2:
The patent employs composite structures by coating gold nanoparticles with stabilizing agents such as gum arabic, proteins, or polymers. This composite approach enhances both the contrast enhancement capability and the tissue retention time by preventing nanoparticle aggregation and controlling their biological clearance.
2Illumination intensity
If iodinated agents are administered at higher doses, then image contrast is improved, but allergic reactions and renal function issues occur
Solution Approach 1:
The patent changes the contrast agent material from iodine-based compounds to gold nanoparticles, which have different biological interaction profiles. Gold is generally biocompatible and does not trigger the same allergic reactions or renal toxicity as iodinated agents, allowing for safe administration at doses sufficient for high-contrast imaging.
3Productivity
If iodinated agents are used, then imaging is possible, but resolution for early cancer detection is limited
Solution Approach 1:
The patent applies functionalization strategies where specific molecules are attached to the gold nanoparticle surface to confer targeting capability. This allows the contrast agent to accumulate preferentially in cancerous tissues, enhancing local contrast and enabling detection of early-stage tumors with higher resolution.
Solution Approach 2:
The patent utilizes the unique optical and radiological properties of gold nanoparticles, which have different X-ray attenuation characteristics compared to iodine. This allows for optimized imaging parameters and potentially higher resolution imaging, particularly when combined with targeted delivery to enhance local concentration in tumor regions.
4Illumination intensity
If iodinated agents are used, then contrast imaging is achieved, but the agents wash off quickly from tissues
Solution Approach 1:
The patent creates composite structures by coating gold nanoparticles with stabilizing agents such as gum arabic, proteins, or polymers. This composite approach enhances both the contrast enhancement capability and the tissue retention time by preventing nanoparticle aggregation and controlling their biological clearance.
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
Gold nanoparticles offer prolonged tissue retention, enabling longer-term imaging with improved contrast and reduced agent doses, while avoiding allergic reactions and renal function issues, and can be effectively targeted to specific tissues, enhancing diagnostic capabilities.
Implementation Method 1
Gold nanoparticles offer prolonged tissue retention, enabling longer-term imaging with improved contrast
Data Source
AI summary
A kit for providing a contrast enhancer in a mammal for contrasting during imaging of the mammal comprises functionalized gold nanoparticles configured to be directed to one or more of a target organ, tissue and lesion of the mammal.