X-ray CT device and bed device
An X-ray CT device according to an embodiment includes a gantry, a top board, and a movement mechanism. The gantry includes an X-ray tube that generates X-rays and a detector that detects the X-rays. The top board inserts the subject into the opening section of the gantry. The movement mechanism moves the top board in a longitudinal direction. Furthermore, the position of the top board in a vertical direction at the position that intersects with the path of the X-rays is changed at substantially the same slope relative to the movement distance of the top board when the top board is moved in the longitudinal direction.
1. An X-ray CT device, comprising:
a gantry including an X-ray tube configured to generate an X-ray, and a detector configured to detect the X-ray;
a top board configured to insert a subject into an opening section of the gantry; and
a movement mechanism configured to move the top board in a longitudinal direction,
wherein a position of the top board in a vertical direction at a position that intersects with a path of the X-ray is changed at substantially a same slope relative to a movement distance of the top board when the top board is moved in the longitudinal direction, so that acceleration that occurs on the top board in a vertical direction is reduced.
2. The X-ray CT device according to claim 1 , wherein
the movement mechanism includes a support section configured to support the top board by being in contact with a lower surface of the top board, and
a surface of the top board, being in contact with the support section, is curved in the longitudinal direction.
3. The X-ray CT device according to claim 1 , wherein
the movement mechanism includes
a support section configured to support the top board by being in contact with a lower surface of the top board;
a fixed section configured to be fixed to one end of the top board with respect to a moving direction; and
a slider configured to movably support the fixed section along a moving direction of the top board, and
the lower surface of the top board includes a projected section configured to be projected toward the support section from a plane that connects both ends of the top board with respect to a moving direction.
4. The X-ray CT device according to claim 3 , wherein the projected section is locally provided on at least part of a lower surface of the top board.
5. The X-ray CT device according to claim 4 , wherein the projected section is provided on a position closer to a center of the top board than both ends of the top board with respect to a moving direction.
6. The X-ray CT device according to claim 3 , wherein the projected section is formed into a shape such that a thickness in a vertical direction is changed along the moving direction so that an amount of displacement of the top board in a vertical direction at a position that intersects with the path of the X-ray is changed at substantially a same slope relative to a movement distance along a movement path of the top board.
7. The X-ray CT device according to claim 6 , wherein an amount of displacement of the top board in a vertical direction is a value that is obtained from actual measurement.
8. The X-ray CT device according to claim 6 , wherein an amount of displacement of the top board in a vertical direction is a value that is obtained by simulation.
9. The X-ray CT device according to claim 3 , wherein the projected section is integrally formed with the top board.
10. The X-ray CT device according to claim 1 , wherein the movement mechanism moves the top board in a vertical direction such that the position of the top board in a vertical direction at the position that intersects with the path of X-rays is changed at substantially a same slope relative to the movement distance of the top board in accordance with the movement of the top board in the longitudinal direction.
11. An X-ray CT device, comprising:
a gantry including an X-ray tube configured to generate an X-ray, and a detector configured to detect the X-ray;
a top board configured to insert a subject into an opening section of the gantry; and
a movement mechanism configured to include a support section, supporting the top board by being in contact with a lower surface of the top board, and move the top board in a longitudinal direction,
wherein a surface of the top board, being in contact with the support section, is curved in the longitudinal direction so that acceleration that occurs on the top board in a vertical direction is reduced.
12. A bed device, comprising:
a top board on which a subject is placed; and
a movement mechanism configured to include a support section, supporting the top board by being in contact with a lower surface of the top board, and to move the top board in a longitudinal direction,
wherein a surface of the top board, being in contact with the support section, is curved in the longitudinal direction so that acceleration that occurs on the top board in a vertical direction is reduced.