# US 8,541,763 B2 · Modifiable layered shield assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,541,763 B2 - Document ID: US8541763B2 - Status: Granted - Kind: B2 - Application number: 13/437,187 - Filed: 2012-04-02 - Published: 2013-01-24 - Granted: 2013-09-24 - Earliest claimed: 2011-07-20 - Assignees: Siemens Medical Solutions USA, Inc. - Applicants: Michael P. Roy - Inventors: Michael P. Roy - Web page: https://patentgrep.com/patent/US8541763B2 ## CPC - G21F 3/00: Shielding characterised by its physical form, e.g. granules, or shape of the material - G21F 1/085: {Heavy metals or alloys} - G21F 1/10: Organic substances; Dispersions in organic carriers - G21F: PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR (radiation protection by pharmaceutical means A61K8/00, A61Q17/04; in cosmonautic vehicles B64G1/54; combined with a reactor G21C11/00; combined with X-ray tubes H01J35/16; combined with X-ray apparatus H05G1/02) ## Abstract A shield for absorbing radiation emitted by a target during operation of a cyclotron. The shield includes an inner box structure having a recess for receiving the target. In addition, the shield includes a first plurality of shield elements arranged in a layered configuration about the inner box structure. The shield also includes an outer box structure for receiving the inner box structure and the first plurality of shield elements. Further, a second plurality of shield elements is arranged in a layered configuration about the outer box structure. The shield elements are arranged in both horizontal and vertical orientations and are removable. ## Claims ### Claim 1 A shield for absorbing radiation emitted by a target during operation of a cyclotron, wherein the target is located within a target enclosure, comprising: an inner box structure having a recess for receiving the target enclosure; a first plurality of shield elements arranged in a layered configuration about the inner box structure to form a first shielding arrangement having first shielding characteristics; an outer box structure for receiving the inner box structure and the first plurality of shield elements; and a second plurality of shield elements arranged in a layered configuration about the outer box structure to form a second shielding arrangement having second shielding characteristics. ### Claim 2 (depends on 1) The shield according to claim 1, wherein the first and second plurality of shield elements includes at least one shield element fabricated from 30% borated polyethylene. ### Claim 3 (depends on 1) The shield according to claim 1, wherein the first and second plurality of shield elements includes at least one shield element fabricated from 5% borated polyethylene. ### Claim 4 (depends on 1) The shield according to claim 1, wherein the first and second plurality of shield elements includes at least one shield element fabricated from lead. ### Claim 5 (depends on 1) The shield according to claim 1, wherein the first and second plurality of shield elements includes at least one shield element fabricated from polyethylene. ### Claim 6 (depends on 1) The shield according to claim 1, wherein the first and second plurality of shield elements are removable. ### Claim 7 (depends on 1) The shield according to claim 1, wherein the inner and outer box structures are fabricated from steel. ### Claim 8 (depends on 1) The shield according to claim 1, further including a cover fabricated from aluminum. ### Claim 9 (depends on 1) The shield according to claim 1, wherein the shield shields against neutron and gamma radiation. ### Claim 10 A shield for absorbing radiation emitted by a target during operation of a cyclotron, wherein the target is located within a target enclosure, comprising: an inner box structure having a recess for receiving the target enclosure; a first plurality of shield elements arranged in first and second orientations about the inner box structure to form a first shielding arrangement having first shielding characteristics; an outer box structure for receiving the inner box structure and the first plurality of shield elements; and a second plurality of shield elements arranged in the first and second orientations about the outer box structure to form a second shielding arrangement having second shielding characteristics. ### Claim 11 (depends on 10) The shield according to claim 10, wherein the first orientation is horizontal and the first and second plurality of shield elements are arranged above and below the inner and outer box structures. ### Claim 12 (depends on 10) The shield according to claim 10, wherein the second orientation is vertical and the first and second plurality of shield elements are arranged on sides and to the rear of the inner and outer box structures. ### Claim 13 (depends on 10) The shield according to claim 10, wherein the first and second plurality of shield elements includes at least one shield element fabricated from 30% borated polyethylene. ### Claim 14 (depends on 10) The shield according to claim 10, wherein the first and second plurality of shield elements includes at least one .shield element fabricated from 5% borated polyethylene. ### Claim 15 (depends on 10) The shield according to claim 10, wherein the first and second plurality of shield elements includes at least one shield element fabricated from lead. ### Claim 16 (depends on 10) The shield according to claim 10, wherein the first and second plurality of shield elements includes at least one shield element fabricated from polyethylene. ### Claim 17 (depends on 10) The shield according to claim 10, wherein the first and second plurality of shield elements are removable. ### Claim 18 A shield arrangement for absorbing radiation emitted by a target during operation of a cyclotron, wherein the target is located within a target enclosure, comprising: an inner box structure having a recess for receiving the target enclosure; a first plurality of removable shield elements arranged about the inner box structure to form a first shielding arrangement having first shielding characteristics; an outer box structure for receiving the inner box structure and the first plurality of shield elements; a second plurality of removable shield elements arranged about the outer box structure to form a second shielding arrangement having second shielding characteristics wherein the inner and outer box structures and first and second plurality of shield elements form a layered shield assembly; and a movable shield for receiving the layered shield assembly. ### Claim 19 (depends on 18) The shield according to claim 18, wherein the first and second plurality of shield elements are removable. ### Claim 20 (depends on 18) The shield according to claim 18, wherein the shield shields against neutron and gamma radiation. ### Claim 21 A shield arrangement for absorbing radiation emitted by a target during operation of a cyclotron, wherein the target is located within a target enclosure, comprising: an inner box structure having a first size and a recess for receiving the target enclosure; a first plurality of first shield elements arranged about the inner box structure wherein the first shield elements are reconfigurable to provide additional or less shielding or to accommodate an alternate size inner box structure wherein the first shield elements form a first shielding arrangement having first shielding characteristics; an outer box structure having a second size for receiving the inner box structure and the first plurality of shield elements; a second plurality of second shield elements arranged about the outer box structure wherein the second shield elements are reconfigurable to provide additional or less shielding or to accommodate an alternate size outer box structure wherein the second shield elements form a second shielding arrangement having second shielding characteristics and wherein the inner and outer box structures and first and second plurality of shield elements form a layered shield assembly; and a movable shield for receiving the layered shield assembly.