X-ray imaging apparatus

1. An X-ray imaging apparatus comprising:

a table, which includes a tabletop on which a subject is placed;

an X-ray tube which generates X-rays;

an X-ray detector which detects the X-rays; and

a column which supports the X-ray tube;

wherein the column includes a first sub column, a second sub column rotatably connected to the first sub column at one end portion of the second sub column, and a third sub column rotatably connected to an other end portion of the second sub column;

wherein the first sub column is arranged to extend along a direction perpendicular to a surface of the tabletop;

wherein the third sub column supports the X-ray tube;

wherein the X-ray detector is placed on an opposite side of the table to the X-ray tube to acquire an X-ray image with an arrangement in a lateral imaging posture in which the third sub column and the second sub column are both arranged along a long axis of the tabletop; and

wherein the X-ray detector is placed under the tabletop of the table to face the X-ray tube to acquire an X-ray image with an arrangement in a frontal imaging posture in which the third sub column is arranged along a short axis of the tabletop.

2. The X-ray imaging apparatus of claim 1 , further comprising an input device which allows an operator to input an instruction to change the arrangement of the X-ray tube, the X-ray detector, and the column between the frontal imaging posture and the lateral imaging posture with respect to the subject;

wherein an axis of the central X-ray of the X-ray tube intersects with the surface of the tabletop at the frontal imaging posture, the axis of the central X-ray of the X-ray tube is parallel to the surface of the tabletop at the lateral imaging posture, and the table includes a first housing and a second housing each detachably housing the X-ray detector;

wherein the first housing is provided at a position facing the X-ray tube in a state of the frontal imaging posture; and,

wherein the second housing is provided at a position on the table so as to face the X-ray tube in a state of the lateral imaging posture on the table.

3. The X-ray imaging apparatus of claim 2 , wherein the axis of the central X-ray of the X-ray tube at the frontal imaging posture intersects with the axis of the central X-ray of the X-ray tube at the lateral imaging posture.

4. The X-ray imaging apparatus of claim 1 , further comprising:

an input device which allows an operator to input an instruction to change the arrangement of the X-ray tube, the X-ray detector, and the column between the frontal imaging posture and the lateral imaging posture with respect to the subject;

a column moving mechanism which moves the first sub column in a long axis direction of the tabletop;

a controller which controls the column moving mechanism;

a first rotating mechanism which rotates the second sub column relative to the first sub column; and,

a second rotating mechanism which rotates the third sub column relative to the second sub column; and

wherein an axis of the central X-ray of the X-ray tube intersects with the surface of the tabletop at the frontal imaging posture, the axis of the central X-ray of the X-ray tube is parallel to the surface of the tabletop at the lateral imaging posture, and the controller controls the column moving mechanism, together with the first rotating mechanism and the second rotating mechanism, in accordance with an instruction from the input device to change the arrangement of the X-ray tube, the X-ray detector, and the column between the frontal imaging posture from the input device and the lateral imaging posture.

5. The X-ray imaging apparatus of claim 1 , further comprising:

a first rotating mechanism which rotates the second sub column about a first rotation axis relative to the first sub column;

a second rotating mechanism which rotates the third sub column about a second rotation axis relative to the second sub column; and,

a follower mechanism which makes the first rotating mechanism and the second rotating mechanism rotate synchronously.

6. An X-ray imaging apparatus comprising:

an X-ray tube configured to generate X-rays;

an X-ray detector configured to detect the X-rays;

a table configured to include a tabletop on which a subject is to be placed;

a column provided on one side of the tabletop and configured to support the X-ray tube;

a first housing provided under the tabletop and configured to detachably house the X-ray detector; and

a second housing provided on an other side of the tabletop and configured to detachably house the X-ray detector;

wherein the column includes a first sub column, a second sub column rotatably connected to the first sub column at one end portion of the second sub column, and a third sub column rotatably connected to an other end portion of the second sub column;

wherein the first sub column is arranged to extend along a direction perpendicular to a surface of the tabletop; and

wherein the third sub column supports the X-ray tube to face the X-ray detector with the third sub column rotated with respect to the second sub column, and the second sub column rotated with respect to the first sub column in accordance with a position of the X-ray detector to capture an image.

7. The X-ray imaging apparatus according to claim 1 ,

wherein the column further includes a first connector and a second connector;

wherein the first connector connects the second sub column to the first sub column, and includes a first rotation axis parallel to a short axis of the tabletop; and

wherein the second connector connects the third sub column to the second sub column, and includes a second rotation axis perpendicular to the first rotation axis and to a direction of extension of the second sub column.

8. The X-ray imaging apparatus according to claim 2 , wherein the second housing is detachably provided at a position on the table.

9. The X-ray imaging apparatus according to claim 6 ,

wherein the column further includes a first connector and a second connector;

wherein the first connector connects the second sub column to the first sub column, and includes a first rotation axis parallel to a short axis of the tabletop; and

wherein the second connector connects the third sub column to the second sub column, and includes a second rotation axis perpendicular to the first rotation axis and to a direction of extension of the second sub column.