Methods and devices for orthovoltage ocular radiotherapy and treatment planning
First Claim
1. A treatment planning method for treating macular degeneration in a patient, comprising:
- scaling, to a measured ocular dimension of an eye, a model of the eye that includes coordinates of retinal features, including a macula and a virtual ocular medium;
establishing at least two treatment axes along which a collimated beam of X-radiation is directable from an external radiation source at the macula in the eye model;
determining, from the known distance of travel of the beam within the model along each treatment axis and from the virtual ocular medium through which the beam travels, the dose of radiation from the source that needs to be delivered along each treatment axis to produce a predetermined total radiation dose at the macula of the eye; and
directing collimated X-radiation beams at the macula in the eye.
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Accused Products
Abstract
A method, code and system for planning the treatment a lesion on or adjacent to the retina of an eye of a patient are disclosed. There is first established at least two beam paths along which x-radiation is to be directed at the retinal lesion. Based on the known spectral and intensity characteristics of the beam, a total treatment time for irradiation along each beam paths is determined. From the coordinates of the optic nerve in the aligned eye position, there is determined the extent and duration of eye movement away from the aligned patient-eye position in a direction that moves the patient'"'"'s optic nerve toward the irradiation beam that will be allowed during treatment, while still maintaining the radiation dose at the patient optic nerve below a predetermined dose level.
300 Citations
7 Claims
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1. A treatment planning method for treating macular degeneration in a patient, comprising:
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scaling, to a measured ocular dimension of an eye, a model of the eye that includes coordinates of retinal features, including a macula and a virtual ocular medium; establishing at least two treatment axes along which a collimated beam of X-radiation is directable from an external radiation source at the macula in the eye model; determining, from the known distance of travel of the beam within the model along each treatment axis and from the virtual ocular medium through which the beam travels, the dose of radiation from the source that needs to be delivered along each treatment axis to produce a predetermined total radiation dose at the macula of the eye; and directing collimated X-radiation beams at the macula in the eye. - View Dependent Claims (2, 3, 4, 5)
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6. Non-transitory machine-readable medium which operates with a computer to execute machine-readable instructions for treating macular degeneration in a patient, comprising the steps of:
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scaling, to a patient-eye ocular dimension supplied as input, a model of an eye that represents retinal features, including the macula and a virtual ocular medium; establishing at least two treatment axes along which a collimated beam of X-radiation will be directed from an external radiation source at the macula in the eye model; determining from a known distance of travel of the beam within the model along each treatment axis and from the virtual ocular medium through which the beam travels, the dose of radiation from the source that needs to be delivered along each treatment axis to produce a predetermined total radiation dose at the macula of the eye; and directing collimated X-radiation beams at the macula in the eye. - View Dependent Claims (7)
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Specification