Magnetic resonance imaging apparatus, bed device for magnetic resonance imaging apparatus and table top of bed device for magnetic resonance imaging apparatus
View Patent ↗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.
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.
2. 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).
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. The magnetic resonance imaging apparatus according to claim 1 ,
wherein the insulating material sections are made from glass fiber reinforced plastic (G-RFP).
10. The magnetic resonance imaging apparatus according to claim 1 ,
wherein the insulating material sections have a structure of a honeycomb.
11. 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.
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.
13. 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).
14. 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.
15. 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.
16. 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.
17. 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.
18. 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.
19. 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.
20. 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).
21. A bed device for a magnetic resonance imaging apparatus according to claim 12 ,
wherein the insulating material sections have a structure of a honeycomb.
22. 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.
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.
24. 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).
25. 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.
26. 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.
27. 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.
28. 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.
29. 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.
30. 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.
31. 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).
32. 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.
33. 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.
34. 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.
35. 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.
36. 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.