Radiotherapy device and multi-leaf collimator
AssigneeHitachi High-Tech Corporation
InventorSatoshi Arai
Life of this patent
Estimating the term…
Abstract
By using a marker excellent in durability in a multi-leaf collimator, positions of the markers are accurately detected, and positions of the leaves are accurately controlled. The markers are plates containing a phosphor, and surfaces of the plates are fixed to surfaces of the leaves such that end surfaces of the plates are located on predetermined end surfaces of the leaves. An image of the end surfaces of the plates is captured by a camera, and positions of the end surfaces are recognized by image processing.
Claims13
A radiotherapy device comprising:
- a radiation source;
- and
- a multi-leaf collimator configured to limit an irradiation range of radiation radiated from the radiation source,
- wherein the multi-leaf collimator includes:
- a plurality of thin plate-shaped leaves made of a material that does not allow the radiation to pass therethrough, the plurality of thin plate-shaped leaves being arranged in a thickness direction;
- markers, which are plates containing a phosphor, the markers being disposed on predetermined end surfaces of the leaves;
- a light source configured to irradiate the markers with light that excites the phosphor;
- and
- a camera configured to capture an image of fluorescence emitted from the markers, the camera being disposed at a position where the camera faces the predetermined end surfaces of the leaves, and
- wherein, surfaces of the plates are fixed to surfaces of the leaves such that end surfaces of the plates are located on the predetermined end surfaces of the leaves, and an image of the end surfaces of the plates is captured by the camera.
A multi-leaf collimator configured to limit an irradiation range of radiation radiated from a radiation source, the multi-leaf collimator comprising:
- a plurality of thin plate-shaped leaves made of a material that does not allow the radiation to pass therethrough, the plurality of thin plate-shaped leaves being arranged in a thickness direction;
- markers containing a phosphor, the markers being disposed on predetermined end surfaces of the leaves;
- a light source configured to irradiate the markers with light that excites the phosphor;
- and
- a camera configured to capture an image of fluorescence emitted from the markers, the camera being disposed at a position where the camera faces the predetermined end surfaces of the leaves,
- wherein the markers are plates containing the phosphor, surfaces of the plates are fixed to surfaces of the leaves such that end surfaces of the plates are located on the predetermined end surfaces of the leaves, and an image of the end surfaces of the plates is captured by the camera.
Dependencies are inferred from the claim text.