Targeted Radiosurgical Neuromodulation Near Critical Structures
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Solution Overview
Problem
Radiosurgery for neuronal modulation is challenging due to the difficulty in precisely targeting specific brain areas without affecting adjacent critical anatomy, leading to potential side effects and lack of selective neuronal alteration.
Innovation Solution
Combining radiosensitizers and radioprotectants with systemically administered molecules that have affinity for specific neuronal types, and using targeted focused ultrasound to temporarily open the blood-brain barrier for anatomically specific delivery, followed by stereotactic radiosurgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If highly collimated beams of ionizing radiation are used for radiosurgical neuromodulation, then anatomic specificity is improved, but radiation spreads into non-targeted tissue causing injury to critical anatomy
Solution Approach 1:
The patent applies local quality by creating distinct radiation environments in different spatial locations: the target brain region receives radiosensitizing conditions that enhance radiation effects for neuromodulation, while adjacent critical structures receive radioprotectant conditions that prevent radiation injury. This spatial differentiation of chemical properties allows selective modulation of radiation effects in specific locations.
Solution Approach 2:
The patent introduces chemical intermediaries (radiosensitizing and radioprotectant agents) that mediate the interaction between ionizing radiation and biological tissue. These agents alter the biological response to radiation locally, enabling the same physical radiation beam to produce beneficial effects in target areas while preventing harmful effects in critical structures.
2Reliability
If radiosensitizers and radioprotectants are delivered systemically, then therapeutic selectivity is improved, but non-targeted uptake causes widespread effects
Solution Approach 1:
The patent achieves local concentration of radiosensitizing and radioprotectant agents through targeted delivery mechanisms. By using focused ultrasound or other targeting methods to open the blood-brain barrier specifically at the target site, the agents are concentrated where needed rather than distributing uniformly throughout the brain, thereby improving therapeutic selectivity while minimizing non-targeted effects.
Solution Approach 2:
The patent employs preliminary action by delivering radiosensitizing and radioprotectant agents to specific brain regions before administering ionizing radiation. This temporal sequencing allows the chemical agents to be in place and ready to modulate radiation effects when the radiation beam is delivered, ensuring that the target region is sensitized while critical structures are protected before the harmful radiation exposure occurs.
3Adaptability or versatility
If ionizing radiation is used for radiomodulation, then neuronal activity alteration is achieved, but cell death and lesion formation occur
Solution Approach 1:
The patent applies parameter changes by modifying the biological state of neurons through chemical agents (radiosensitizers and radioprotectants) rather than directly changing physical radiation parameters. The radiosensitizing agent enhances radiation-induced neuromodulation effects in the target region, while the radioprotectant agent prevents radiation-induced cell death, thereby changing the biological response parameters to achieve therapy without toxicity.
Solution Approach 2:
The patent converts the harmful effects of ionizing radiation into beneficial therapeutic effects by using radiosensitizing agents to enhance neuromodulation in target regions and radioprotectant agents to prevent damage in critical structures. The same ionizing radiation that would normally cause cell death is transformed into a safe and effective neuromodulation tool through the protective chemical 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
Achieves safer and more therapeutically selective neuronal modulation by minimizing radiation effects on non-targeted tissues and critical structures.
Implementation Method 1
delivery of these agents may be accomplished by anatomically specific methods, for example, by use of ultrasound. In some such embodiments, methods utilize targeted focused ultrasound with systemically infused microbubbles to temporarily open the blood-brain barrier
Implementation Method 2
delivering a cellulary-non-lethal dose of ionizing radiation delivered by stereotactic radiosurgery
Data Source
AI summary
Methods of treatment and treatment systems for performing radiomodulatory stereotactic radiosurgery to treat brain disorders in which target neural tissues associated with the brain disorder are sensitized to radiation by administration of a molecular substance and/or non-targeted critical structures are protected from radiation by a molecular substance, in order to treat disorders of brain circuitry. Specific embodiments disclose means for treating pain, obesity and drug addiction.