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US 11,529,432 B2Granted
Polymer coatings for brachytherapy devices
AssigneeAlpha Tau Medical Ltd.
InventorsItzhak Kelson, Yona Keisari, Michael Schmidt, Avia Berkowitz
Life of this patent
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Abstract
Described embodiments include an apparatus (20, 21), which includes a support (22), including an outer surface (24) and configured for insertion into a body of a subject. The apparatus further includes multiple atoms (26) of a radionuclide, which radioactively decays to produce a daughter radionuclide, coupled to the outer surface, and a layer (28, 33) of a polymer, which is permeable to the daughter radionuclide, that covers the atoms. Other embodiments are also described.
Claims28
An apparatus, comprising:
- a support, configured for insertion into a body of a subject;
- an inner layer of an inner polymer, which coats the support;
- multiple atoms of a radionuclide, which radioactively decays to produce a daughter radionuclide, coupled to an outer surface of the inner layer,
- the inner layer allowing diffusion of the daughter radionuclide therethrough;
- and
- an outer layer of an outer polymer, which covers the atoms so as to protect the atoms from being washed away, yet allows diffusion of the daughter radionuclide through the outer layer.
3 more elements
A method, comprising:
- coating an outer surface of a support, which is configured for insertion into a body of a subject, with an inner layer of an inner polymer;
- depositing multiple atoms of a radionuclide, which radioactively decays to produce a daughter radionuclide, onto an outer surface of the inner layer,
- the inner layer allowing diffusion of the daughter radionuclide therethrough;
- and
- subsequently to depositing the atoms onto the outer surface of the inner layer, covering the atoms with an outer layer of an outer polymer that protects the atoms from being washed away, yet allows diffusion of the daughter radionuclide through the outer layer.
2 more elements
A method, comprising:
- inserting a radiation source into a body of a subject, the radiation source including:
- a support,
- an inner layer of an inner polymer, which coats the support,
- multiple atoms of a radionuclide, which radioactively decays to produce a daughter radionuclide, coupled to an outer surface of the inner layer,
- the inner layer allowing diffusion of the daughter radionuclide therethrough, and
- an outer layer of an outer polymer, which covers the atoms so as to protect the atoms from being washed away, yet allows diffusion of the daughter radionuclide through the outer layer;
- and
- leaving the radiation source within the body of the subject, such that nuclei of the daughter radionuclide diffuse through the outer layer.
5 more elements
Dependencies are inferred from the claim text.