X-ray diagnostic apparatus

1. An X-ray diagnostic apparatus comprising:

a floor rotating arm, one end of the floor rotating arm being mounted on a floor surface so as to be rotatable around a substantially vertical first rotation axis;

a stand mounted on the other end of the floor rotating arm so as to be rotatable around a substantially vertical second rotation axis;

an arm holder mounted on the stand so as to be rotatable around a substantially horizontal third rotation axis;

a substantially C-shaped, C-arm mounted on the arm holder so as to be slidable around a substantially horizontal fourth rotation axis, with an isocenter at which the fourth rotation axis intersects the third rotation axis being located on the first rotation axis when the C-arm is located above the floor rotating arm;

a first X-ray generating unit mounted on one end of the C-arm;

a first X-ray detecting unit mounted on the other end of the C-arm; and

an Ω-arm having a second X-ray generating unit and a second X-ray detecting unit mounted on the two ends of the Ω-arm, the Ω-arm arranged such that the C-arm can be moved into a position so that a first imaging axis of the first X-ray generating unit intersects with a second imaging axis of the second X-ray generating unit, wherein

when (a) the C-arm is arranged in a vertical position, (b) a rotational angle of the second rotation axis is at a reference position set such that the C-arm is arranged in parallel with the floor rotating arm, and (c) the first imaging axis is substantially vertical, then the C-arm is aligned with the floor rotating arm and the C-arm is provided in a zero offset state such that the C-arm is located immediately above the floor rotating arm so as to overlap the floor rotating arm and a central line of the C-arm coincides with the first rotation axis and the first imaging axis, and wherein

the first X-ray detecting unit is arranged on the other end of the C-arm so as to be rotatable around the first imaging axis of the first X-ray generating unit.

2. An apparatus according to claim 1 , wherein a distance between the second rotation axis and the isocenter is substantially equal to a distance between the first rotation axis and the second rotation axis.

3. An apparatus according to claim 1 , which further comprises a catheterization table having a table top which is movable in a longitudinal direction, and in which the first rotation axis intersects a central line of the table top.

4. An apparatus according to claim 1 , wherein the second rotation axis is parallel to the first rotation axis.

5. An X-ray diagnostic apparatus comprising:

a floor rotating arm whose one end is mounted on a floor surface so as to be rotatable around a substantially vertical first rotation axis;

a stand which is supported on the other end of the floor rotating arm so as to be rotatable around a substantially vertical second rotation axis;

an arm holder which is supported on the stand so as to be rotatable around a substantially horizontal third rotation axis;

a substantially C-shaped, C-arm which is supported on the arm holder so as to be slidable/rotatable around a substantially horizontal fourth rotation axis, with a distance between the first rotation axis and the second rotation axis being substantially equal to a distance from an isocenter at which the third rotation axis intersects the fourth rotation axis to the second rotation axis;

a first X-ray generating unit mounted on one end of the C-arm;

a first X-ray detecting unit mounted on the other end of the C-arm; and

an Ω-arm having a second X-ray generating unit and a second X-ray detecting unit mounted on the two ends of the Ω-arm, the Ω-arm arranged such that the C-arm can be moved into a position so that a first imaging axis of the first X-ray generating unit intersects with a second imaging axis of the second X-ray generating unit, wherein

when (a) the C-arm is arranged in a vertical position, (b) a rotational angle of the second rotation axis is at a reference position set such that the C-arm is arranged in parallel with the floor rotating arm, and (c) the first imaging axis is substantially vertical, then the C-arm is aligned with the floor rotating arm and the C-arm is provided in a zero offset state such that the C-arm is located immediately above the floor rotating arm so as to overlap the floor rotating arm and a central line of the C-arm coincides with the first rotation axis and the first imaging axis, and wherein

the first X-ray detecting unit is arranged on the other end of the C-arm so as to be rotatable around the first imaging axis of the first X-ray generating unit.

6. An apparatus according to claim 5 , which further comprises a catheterization table having a table top which is movable in a longitudinal direction, and in which the first rotation axis intersects a central line of the table top.

7. An X-ray diagnostic apparatus comprising:

a floor rotating arm whose one end is mounted on a floor surface so as to be rotatable around a substantially vertical first rotation axis;

a stand which is supported on the other end of the floor rotating arm so as to be rotatable around a substantially vertical second rotation axis;

an arm holder which is supported on the stand so as to be rotatable around a substantially horizontal third rotation axis;

a substantially C-shaped, C-arm which is supported on the arm holder so as to be slidable/rotatable around a substantially horizontal fourth rotation axis, with an imaging axis passing through an X-ray focal point of a first X-ray generating unit and the center of a detection surface of a first X-ray detecting unit substantially coinciding with the first rotation axis when the stand, the arm holder, and the C-arm are located at standard positions;

the first X-ray generating unit mounted on one end of the C-arm;

the first X-ray detecting unit mounted on the other end of the C-arm; and

an Ω-arm having a second X-ray generating unit and a second X-ray detecting unit mounted on the two ends of the Ω-arm, the Ω-arm arranged such that the C-arm can be moved into a position so that a first imaging axis of the first X-ray generating unit intersects with a second imaging axis of the second X-ray generating unit, wherein

when (a) the C-arm is arranged in a vertical position, (b) a rotational angle of the second rotation axis is at a reference position set such that the C-arm is arranged in parallel with the floor rotating arm, and (c) the first imaging axis is substantially vertical, then the C-arm is aligned with the floor rotating arm and the C-arm is provided in a zero offset state such that the C-arm is located immediately above the floor rotating arm so as to overlap the floor rotating arm and a central line of the C-arm coincides with the first rotation axis and the first imaging axis, and wherein

the first X-ray detecting unit is arranged on the other end of the C-arm so as to be rotatable around the first imaging axis of the first X-ray generating unit.

8. An apparatus according to claim 7 , which further comprises a catheterization table having a table top which is movable in a longitudinal direction, and in which the first rotation axis intersects a central line of the table top.

9. An apparatus according to claim 8 , wherein a distance between the second rotation axis and the isocenter is substantially equal to a distance between the first rotation axis and the second rotation axis.

10. An X-ray diagnostic apparatus comprising:

a floor rotating arm whose one end is mounted on a floor surface so as to be rotatable around a substantially vertical first rotation axis;

a stand which is supported on the other end of the floor rotating arm so as to be rotatable around a substantially vertical second rotation axis;

an arm holder which is supported on the stand so as to be rotatable around a substantially horizontal third rotation axis;

a substantially C-shaped, C-arm which is supported on the arm holder so as to be slidable/rotatable around a substantially horizontal fourth rotation axis, with an isocenter at which the third rotation axis intersects the fourth rotation axis being located on an arcuated path intersecting the first rotation axis upon rotation of the stand;

a first X-ray generating unit mounted on one end of the C-arm;

a first X-ray detecting unit mounted on the other end of the C-arm; and

an Ω-arm having a second X-ray generating unit and a second X-ray detecting unit mounted on the two ends of the Ω-arm, the Ω-arm arranged such that the C-arm can be moved into a position so that a first imaging axis of the first X-ray generating unit intersects with a second imaging axis of the second X-ray generating unit, wherein

when (a) the C-arm is arranged in a vertical position, (b) a rotational angle of the second rotation axis is at a reference position set such that the C-arm is arranged in parallel with the floor rotating arm, and (c) the first imaging axis is substantially vertical, then the C-arm is aligned with the floor rotating arm and the C-arm is provided in a zero offset state such that the C-arm is located immediately above the floor rotating arm so as to overlap the floor rotating arm and a central line of the C-arm coincides with the first rotation axis and the first imaging axis, and wherein

the first X-ray detecting unit is arranged on the other end of the C-arm so as to be rotatable around the first imaging axis of the first X-ray generating unit.

11. An apparatus according to claim 10 , which further comprises a catheterization table having a table top which is movable in a longitudinal direction, and in which the first rotation axis intersects a central line of the table top.