Radiotherapy apparatus
First Claim
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1. A radiotherapy apparatus comprising:
- an accelerator for accelerating an electron beam;
deflectors for deflecting the electron beam accelerated by said accelerator to irradiate a plurality of radioactive ray generating positions;
radioactive ray generating means arranged corresponding to said plurality of radioactive ray generating positions, said radioactive ray generating means generating a radioactive ray when it is irradiated by said electron beam; and
a collimator for collimating said radioactive ray so as to irradiate a point;
wherein said radioactive ray generating means has a two dimensional arrangement, and said deflectors deflect and control the electron beam to irradiate a plurality of radioactive ray generating positions of said radioactive ray generating means in a vertical direction.
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Abstract
In order to construct a radiotherapy apparatus which can irradiate a point in the body of a patient in an optional direction with high accuracy, an accelerated electron beam is controlled electrically by using deflectors so as to irradiate a plurality of radioactive ray generating positions, a collimator is provided so that a radioactive ray generated from the positions can irradiate one point of a portion of the patient'"'"'s body to be treated, and a gantry can be rotated mechanically.
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Citations
15 Claims
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1. A radiotherapy apparatus comprising:
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an accelerator for accelerating an electron beam; deflectors for deflecting the electron beam accelerated by said accelerator to irradiate a plurality of radioactive ray generating positions; radioactive ray generating means arranged corresponding to said plurality of radioactive ray generating positions, said radioactive ray generating means generating a radioactive ray when it is irradiated by said electron beam; and a collimator for collimating said radioactive ray so as to irradiate a point; wherein said radioactive ray generating means has a two dimensional arrangement, and said deflectors deflect and control the electron beam to irradiate a plurality of radioactive ray generating positions of said radioactive ray generating means in a vertical direction. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A radiotherapy apparatus comprising:
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an accelerator for accelerating an electron beam; deflectors for deflecting the accelerated electron beam to irradiate a plurality of radioactive ray generating positions; radioactive ray generating means disposed at least at the plurality of radioactive ray generating positions for generating a radioactive ray when the radioactive ray generating means is irradiated by the deflected electron beam at the plurality of radioactive ray generating positions; a collimator having a surface with a plurality of apertures formed therein, the apertures being arranged in two dimensions on the surface of the collimator, each of the apertures collimating a radioactive ray generated by the radioactive ray generating means such that the collimated radioactive ray irradiates a point at which radiotherapy treatment is to be performed; and a gantry having mounted thereon the deflectors and the radioactive ray generating means, the gantry being rotatable about an axis extending through the point at which radiotherapy treatment is to be performed. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A radiotherapy apparatus comprising:
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an accelerator for accelerating an electron beam; a lens for focusing the accelerated electron beam at a point on an axis; and deflectors for deflecting the focused electron beam to irradiate the point on the axis from arbitrary angles relative to the axis, the deflectors being rotatable about the axis such that the deflected electron beam can irradiate the point on the axis from arbitrary directions in a three-dimensional space. - View Dependent Claims (14, 15)
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Specification