Tailor-Made Radioactive Source for Skin Tumor Treatment
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Solution Overview
Problem
Current radiotherapy methods for skin tumors, particularly basal cell carcinoma and squamous cell carcinoma, face challenges in delivering targeted and localized radiation without harming healthy tissues, especially in sensitive areas where external beam radiation is unsuitable due to its penetrating nature.
Innovation Solution
A method involving a tailor-made radioactive source composed of a matrix-forming component, such as acrylic resin, and a beta emitter isotope, applied in a moldable form to cover the skin lesion, ensuring precise delivery of therapeutic doses directly to the tumor site while sparing surrounding healthy tissue, using a protective layer to prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If external beam radiation is used to treat skin tumors, then the treatment can cover large areas, but the radiation penetrates deeply and damages healthy tissues
Solution Approach 1:
The patent applies local quality by using a radioactive paint that can be precisely applied only to the tumor site on the skin surface. The beta radiation from isotopes like 90Y or 188Re has a limited penetration depth (a few millimeters), which confines the therapeutic effect to the superficial tumor while sparing deeper healthy tissues. This resolves the contradiction by providing localized treatment rather than broad external beam radiation.
Solution Approach 2:
The patent introduces an intermediary substance - a radioactive paint containing beta-emitting isotopes dispersed in a polymer matrix. This paint acts as a mediator between the radiation source and the tumor, allowing controlled delivery of radiation directly to the skin surface where the tumor is located, thereby avoiding deep tissue penetration and damage to healthy structures.
2Measurement precision
If a radioactive source is applied directly to the skin, then precise targeted treatment is achieved, but radioactive contamination of the skin occurs
Solution Approach 1:
The patent uses a polymer matrix (such as acrylic resin or cyanoacrylate) as an intermediary carrier that embeds the radioactive isotopes. This matrix forms a stable, non-contaminating layer on the skin surface that holds the radioactive material in place during treatment while preventing direct contact and potential contamination of the underlying skin tissues.
Solution Approach 2:
The radioactive paint forms a thin film or coating on the skin surface that encapsulates the radioactive isotopes. This flexible film allows precise conformal application to the tumor shape while acting as a barrier that prevents radioactive contamination of the skin, resolving the contradiction between targeted delivery and contamination prevention.
3Length of stationary object
If traditional radiotherapy methods are used, then deep tumors can be treated, but superficial skin tumors receive insufficient localized dose
Solution Approach 1:
The patent applies local quality by concentrating the radioactive material directly on the skin surface at the tumor site. The beta radiation from the applied paint delivers a high concentrated dose to the superficial tumor layers while the limited penetration depth of beta particles naturally spares deeper tissues. This resolves the contradiction by optimizing dose concentration for superficial tumors rather than using methods designed for deep tumors.
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 allows for effective treatment with high cure rates and minimal side effects, as the beta radiation primarily deposits dose in the upper skin layers, avoiding deeper tissues and reducing the need for multiple sessions, with excellent cosmetic and functional outcomes, even in difficult-to-treat areas.
Implementation Method 1
beta emitter isotope... the beta radiation primarily deposits dose in the upper skin layers, avoiding deeper tissues
Data Source
AI summary
Embodiments of the invention relate to a method of treating a cancerous or non-cancerous skin lesion of a subject, e.g. a human patient, by epidermal radioisotope therapy, a specialized type of brachytherapy. The method can include defining and marking an area of skin to be treated; covering the area with a protective layer, e.g. a protective film or foil; applying a tailor-made radioactive source by applying a layer of a radioactive source material on the protective layer, such that the area is covered by the material while any area not to be treated is spared; and removing the radioactive source after a predetermined time period of irradiation.