Beam stopper for a radiotherapy device
AssigneeElekta Beijing Medical Systems Co., Ltd
InventorsXun Feng, Yingping Zhao, Shijia Zhang
Life of this patent
Estimating the term…
Abstract
A radiotherapy system (220, 320) comprises a first rotary support apparatus (204, 304) configured to support a radiation beam source (200, 300) and to cause a radiation beam source (200, 300) to rotate about a rotation axis (218, 318, 518), a second rotary support apparatus (214, 314, 414, 514) and a radiation shield (202, 302, 402, 502) mounted to the second rotary support apparatus (214, 314, 414, 514). The second rotary support apparatus (214, 314, 414, 514) is configured to cause the radiation shield (202, 302, 402, 502) to rotate about the rotation axis (218, 318, 518).
Claims25
A radiotherapy system comprising:
- a first rotary support apparatus configured to support a radiation beam source and to cause the radiation beam source to rotate about a rotation axis;
- a second rotary support apparatus;
- a radiation shield mounted to the second rotary support apparatus, wherein the second rotary support apparatus is configured to cause the radiation shield to rotate about the rotation axis, and wherein the second rotary support apparatus includes one of:
- a rotatable gantry, wherein the radiation shield is fixed to the rotatable gantry, and wherein the rotatable gantry is configured to rotate about the rotation axis passing through a center of the rotatable gantry;
- two concentric ring gantries with concentric central bores centered on the rotation axis, wherein a first end and an opposing second end of the radiation shield are fixed to each of the two concentric ring gantries, and wherein the two concentric ring gantries are configured to rotate about the rotation axis to cause the radiation shield to rotate about the rotation axis;
- or
- one or more curved guides, wherein the radiation shield is slidably mounted to the one or more curved guides to travel along the one or more curved guides.
A method of controlling a rotation of a radiation shield in a radiotherapy system:
- rotating a radiation beam source about a rotation axis, wherein the radiation beam source is mounted on a first rotary support apparatus and is configured to emit a radiation beam;
- and
- rotating a radiation shield about the rotation axis, wherein the radiation shield is mounted on a second rotary support apparatus separate from the first rotary support apparatus, wherein the rotation of the radiation shield is synchronized with the rotation of the radiation beam source, and wherein the second rotary support apparatus includes one of:
- a rotatable gantry, wherein the radiation shield is fixed to the rotatable gantry, and wherein the rotatable gantry is configured to rotate about the rotation axis passing through a center of the rotatable gantry;
- two concentric ring gantries with concentric central bores centered on the rotation axis, wherein a first and an opposing second end of the radiation shield are fixed to each of the two concentric ring gantries, and wherein the two concentric ring gantries are configured to rotate about the rotation axis to cause the radiation shield to rotate about the rotation axis;
- or
- one or more curved guides, wherein the radiation shield is slidably mounted to the one or more curved guides.
Dependencies are inferred from the claim text.