# US 8,788,014 B2 · Magnetic resonance imaging apparatus, bed device for magnetic resonance imaging apparatus and table top of bed device for magnetic resonance imaging apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,788,014 B2 - Document ID: US8788014B2 - Status: Granted - Kind: B2 - Application number: 12/613,169 - Filed: 2009-11-05 - Published: 2010-05-06 - Granted: 2014-07-22 - Earliest claimed: 2008-11-06 - Assignees: Kabushiki Kaisha Toshiba; Toshiba Medical Systems Corporation - Applicants: Takuhiro Oosawa - Inventors: Takuhiro Oosawa - Web page: https://patentgrep.com/patent/US8788014B2 ## CPC - A61B 5/704: {Tables} - A61B 5/055: involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging - G01R 33/307: {specially adapted for moving the sample relative to the MR system, e.g. spinning mechanisms, flow cells or means for positioning the sample inside a spectrometer} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) ## Abstract A number of C-FRP molded material sections that are elongated and made from a carbon fiber reinforced plastic are placed parallel to each other. The C-FRP molded material sections are insulated from each other by honeycomb material sections that are made from an insulating and nonmagnetic material. The C-FRP molded material sections and the honeycomb material sections are maintained by a glass fiber layer into a sheet plate shape. ## Claims ### Claim 1 A magnetic resonance imaging apparatus comprising: a static magnetic field generating section configured to generate a static magnetic field in an imaging space into which a subject is placed; a gradient magnetic field generating section configured to generate a gradient magnetic field in the imaging space into which the subject is placed, which adds to the static magnetic field generated by the static magnetic field generating section; a transmitting section configured to transmit a radio frequency pulse to the imaging space; a receiving section configured to receive a magnetic resonance signal from the subject; a calculating section configured to reconstruct an image based on the magnetic resonance signal from the receiving section; a table top having a long side in a longitudinal direction and a short side in a cross-direction and configured to support the subject; and a bed device configured to move the table top into the imaging space; wherein the table top comprises: a plurality of unitary quadrangular shaped conductive and elongated material sections placed a distance apart from each other; a plurality of unitary quadrangular shaped insulating material sections that are nonmagnetic and provided between respective of the plurality of conductive and elongated material sections; and a layer positioned entirely around the conductive and elongated material sections and the insulating material sections, configured to hold the conductive and elongated material sections and the insulating material sections into a plate sheet shape. ### Claim 2 (depends on 1) The magnetic resonance imaging apparatus according to claim 1, wherein the conductive and elongated material sections are made from carbon fiber reinforced plastic (C-FRP). ### Claim 3 (depends on 2) The magnetic resonance imaging apparatus according to claim 2, wherein the insulating material sections are made from a nonmagnetic and insulating material; and the conductive and elongated material sections and insulating material sections are staggered parallel to each other. ### Claim 4 (depends on 3) The magnetic resonance imaging apparatus according to claim 3, wherein a longitudinal direction of the conductive and elongated material sections is substantially parallel to a longitudinal direction of the table top or a cross-direction of the table top. ### Claim 5 (depends on 3) The magnetic resonance imaging apparatus according to claim 3, wherein a longitudinal direction of the conductive and elongated material sections is not parallel to either a longitudinal direction of the table top or a cross-direction of the table top. ### Claim 6 (depends on 3) The magnetic resonance imaging apparatus according to claim 3, wherein a first group of the conductive and elongated material sections are placed substantially parallel to a first direction; and a second group of the conductive and elongated material sections are placed substantially parallel to a second direction different from the first direction. ### Claim 7 (depends on 6) The magnetic resonance imaging apparatus according to claim 6, wherein the first direction is substantially parallel to the longitudinal direction of the table top; and the second direction is substantially parallel to the cross-direction of the table top. ### Claim 8 (depends on 6) The magnetic resonance imaging apparatus according to claim 6, wherein the first direction and the second direction are not parallel to the longitudinal direction of the table top and are not parallel to the cross-direction of the table top. ### Claim 9 (depends on 1) The magnetic resonance imaging apparatus according to claim 1, wherein the insulating material sections are made from glass fiber reinforced plastic (G-RFP). ### Claim 10 (depends on 1) The magnetic resonance imaging apparatus according to claim 1, wherein the insulating material sections have a structure of a honeycomb. ### Claim 11 (depends on 10) The magnetic resonance imaging apparatus according to claim 10, wherein the insulating material sections are placed so that the structure of the honeycomb extends in a vertical direction of the table top. ### Claim 12 A bed device for a magnetic resonance imaging apparatus comprising: a table top having a long side in a longitudinal direction and a short side in a cross-direction and configured to support the subject, comprising: a plurality of unitary quadrangular shaped conductive and elongated material sections placed a distance apart from each other; a plurality unitary quadrangular shaped of insulating material sections that are nonmagnetic and provided between respective of the plurality of conductive and elongated sections; and a layer positioned entirely around the conductive and elongated material sections and the insulating material sections, configured to hold the conductive and elongated material sections and the insulating material sections into a plate sheet shape; and a support section configured to support the table top. ### Claim 13 (depends on 12) A bed device for a magnetic resonance imaging apparatus according to claim 12, wherein the elongated material sections are made from carbon fiber reinforced plastic (C-FRP). ### Claim 14 (depends on 13) A bed device for a magnetic resonance imaging apparatus according to claim 13, wherein the insulating material sections are made from a nonmagnetic and insulating material; and the conductive and elongated material sections and insulating material sections are staggered parallel to each other. ### Claim 15 (depends on 14) A bed device for a magnetic resonance imaging apparatus according to claim 14, wherein a longitudinal direction of the conductive and elongated material sections are substantially parallel to a longitudinal direction of the table top or a cross-direction of the table top. ### Claim 16 (depends on 14) A bed device for a magnetic resonance imaging apparatus according to claim 14, wherein a longitudinal direction of the conductive and elongated material sections is not parallel to either a longitudinal direction of the table top or a cross-direction of the table top. ### Claim 17 (depends on 14) A bed device for a magnetic resonance imaging apparatus according to claim 14, wherein a first group of the conductive and elongated material sections are placed substantially parallel to a first direction; and a second group of the conductive and elongated material sections are placed substantially parallel to a second direction different from the first direction. ### Claim 18 (depends on 17) A bed device for a magnetic resonance imaging apparatus according to claim 17, wherein the first direction is substantially parallel to the longitudinal direction of the table top; and the second direction is substantially parallel to the cross-direction of the table top. ### Claim 19 (depends on 17) A bed device for a magnetic resonance imaging apparatus according to claim 17, wherein the first direction and the second direction are not parallel to the longitudinal direction of the table top and are not parallel to the cross-direction of the table top. ### Claim 20 (depends on 12) A bed device for a magnetic resonance imaging apparatus according to claim 12, wherein the insulating material sections are made from carbon fiber reinforced plastic (G-FRP). ### Claim 21 (depends on 12) A bed device for a magnetic resonance imaging apparatus according to claim 12, wherein the insulating material sections have a structure of a honeycomb. ### Claim 22 (depends on 21) A bed device for a magnetic resonance imaging apparatus according to claim 21, wherein the insulating material sections are placed so that the structure of the honeycomb extends in a vertical direction of the table top. ### Claim 23 A table top of a bed device for a magnetic resonance imaging apparatus having a long side in a longitudinal direction and a short side in a cross-direction and configured to support the subject, comprising: a plurality of unitary quadrangular shaped conductive and elongated material sections configured to be placed a distance apart from each other; a plurality of unitary quadrangular shaped insulating material sections that are nonmagnetic and provided between respective of the plurality of conductive and elongated material sections; and a layer positioned entirely around the conductive and elongated material sections and the insulating material sections, configured to hold the conductive and elongated material sections and the insulating material sections into a plate sheet shape. ### Claim 24 (depends on 23) A table top of a bed device for a magnetic resonance imaging apparatus according to claim 23, wherein the conductive and elongated material sections are made from carbon fiber reinforced plastic (C-FRP). ### Claim 25 (depends on 24) A table top of a bed device for a magnetic resonance imaging apparatus according to claim 24, wherein the insulating material sections are made from a nonmagnetic and insulating material; and the conductive and elongated material sections and insulated material sections are staggered parallel to each other. ### Claim 26 (depends on 25) A table top of a bed device for a magnetic resonance imaging apparatus according to claim 25, wherein a longitudinal direction of the conductive and elongated material sections are substantially parallel to a longitudinal direction of the table top or a cross-direction of the table top. ### Claim 27 (depends on 25) A table top of a bed device for a magnetic resonance imaging apparatus according to claim 25, wherein a longitudinal direction of the conductive and elongated material sections are not parallel to either a longitudinal direction of the table top or a cross-direction of the table top. ### Claim 28 (depends on 25) A table top of a bed device for a magnetic resonance imaging apparatus according to claim 25, wherein a first group of the conductive and elongated material sections are placed substantially parallel to a first direction; and a second group of the conductive and elongated material sections are placed substantially parallel to a second direction different from the first direction. ### Claim 29 (depends on 28) A table top of a bed device for a magnetic resonance imaging apparatus according to claim 28, wherein the first direction is substantially parallel to the longitudinal direction of the table top; and the second direction is substantially parallel to the cross-direction of the table top. ### Claim 30 (depends on 28) A table top of a bed device for a magnetic resonance imaging apparatus according to claim 28, wherein the first direction and the second direction are not parallel to the longitudinal direction of the table top and are not parallel to the cross-direction of the table top. ### Claim 31 (depends on 23) A table top of a bed device for a magnetic resonance imaging apparatus according to claim 23, wherein the insulating material sections are made from glass fiber reinforced plastic (G-FRP). ### Claim 32 (depends on 23) A table top of a bed device for a magnetic resonance imaging apparatus according to claim 23, wherein the insulating material sections have a structure of a honeycomb. ### Claim 33 (depends on 32) A table top of a bed device for a magnetic resonance imaging apparatus according to claim 32, wherein the insulating material sections are placed so that the structure of the honeycomb extends in a vertical direction of the table top. ### Claim 34 (depends on 1) A magnetic resonance imaging apparatus according to claim 1, wherein the plurality of conductive and elongated material sections and the plurality of insulating material sections have substantially same cross-sections and substantially same lengths. ### Claim 35 (depends on 12) A bed device according to claim 12, wherein the plurality of conductive and elongated material sections and the plurality of insulating material sections have substantially same cross-sections and substantially same lengths. ### Claim 36 (depends on 23) A table top of a bed device according to claim 23, wherein the plurality of conductive and elongated material sections and the plurality of insulating material sections have substantially same cross-sections and substantially same lengths.