Leaf actuator for a multi-leaf collimator
AssigneeElekta Limited
InventorMartin Broad
Life of this patent
Estimating the term…
Abstract
A leaf unit for a multi-leaf collimator may comprise a leaf, a leaf actuator screw, a rotatable part threadably engaged with the leaf actuator screw, a leaf actuator motor, and a supporting bracket. The leaf actuator screw including a first end fixedly attached to the leaf and the leaf actuator motor being coupled to the rotatable part. The support bracket comprising a first portion with a first opening arranged to receive and support the leaf actuator motor and a second portion with a second opening including a bearing. The second opening being arranged to receive and support the rotatable part. A center of the first opening is aligned with that of the second opening so that an axis of the leaf actuator motor and an axis of the rotatable part of each leaf actuator are colinear.
Claims14
A leaf unit assembly for a multi-leaf collimator, the leaf unit assembly comprising:
- a leaf;
- a leaf actuator screw having a first end fixedly attached to the leaf;
- a rotatable part threadably engaged with the leaf actuator screw;
- a leaf actuator motor coupled to the rotatable part;
- and
- a support bracket comprising:
- a first portion comprising a first opening arranged to receive and support the leaf actuator motor;
- and
- a second portion comprising a second opening having a bearing therein, arranged to receive and support the rotatable part, wherein a center of the first opening is aligned with that of the second opening so that an axis of the leaf actuator motor and an axis of the rotatable part of each leaf actuator are collinear.
A multi-leaf collimator for a radiotherapy device, the multi-leaf collimator comprising:
- a leaf bank including a plurality of leaf unit assemblies wherein each leaf unit assembly of the plurality the leaf unit assemblies comprises:
- a leaf,
- a leaf actuator screw having a first end fixedly attached to the leaf, and
- a rotatable part threadably engaged with the leaf actuator screw;
- a leaf actuator motor coupled to the rotatable part;
- and
- a support bracket comprising:
- a first portion comprising a first opening arranged to receive and support the leaf actuator motor;
- and
- a second portion comprising a second opening having a bearing therein, arranged to receive and support the rotatable part, wherein a center of the first opening is aligned with that of the second opening so that an axis of the leaf actuator motor and an axis of the rotatable part of cach leaf actuator are collinear, and wherein a rotational movement of each leaf relative to each other is restricted such that rotation of each rotatable part imparts linear motion of the respective leaf actuator screw and leaf relative to the rotatable part.
A radiotherapy device comprising:
- a multi-leaf collimator, the multi-leaf collimator comprising:
- a leaf bank including one or more leaf assembly units, wherein each of the one or more leaf assembly units comprises:
- a leaf;
- a leaf actuator screw having a first end fixedly attached to the leaf;
- a rotatable part threadably engaged with the leaf actuator screw;
- a leaf actuator motor coupled to the rotatable part;
- and
- a support bracket comprising:
- a first portion comprising a first opening arranged to receive and support the leaf actuator motor;
- and
- a second portion comprising a second opening having a bearing therein, arranged to receive and support the rotatable part, wherein a center of the first opening is aligned with that of the second opening so that an axis of the leaf actuator motor and an axis of the rotatable part of each leaf actuator are collinear.
Dependencies are inferred from the claim text.