Medical x-ray system suited for angiography

Details Medical x-ray system suited for angiography Medical x-ray system suited for angiography

1999-08-20

2001-07-24

Kim, Robert H. (Department: 2882)

X-ray or gamma ray systems or devices

Source support

Including object support or positioning

C378S004000

Reexamination Certificate

active

06264364

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is directed to a medical x-ray system of the type suitable for conducting procedures and examinations.
2. Description of the Prior Art
Medical systems are known which include the basic components of an x-ray tube that emits x-rays and a radiation receiver that are arranged at a C-arm, a stand that supports the C-arm, the stand having an arm that is rotatably mounted at one end so as to be rotatable around a stationary axis, and a holding device carrying the C-arm, which is rotatably mounted at the other end of the arm, and a patient table.
European Application 0 670 145, for example, discloses such a system. The mounting of the stand, including an isocentrically structured C-arm with an x-ray tube and radiation receiver enables a horizontal displacement of the isocenter along the patient table. The arm of the stand at which the C-arm holding device is arranged is rotatably mounted at a fastening component, which is rigidly mounted at the floor. This fastening component and the rotational axis around which the arm is rotatable are disposed such that the rotational axis lies outside of the center line of the examination table, i.e. the rotational axis is laterally offset relative to the central longitudinal axis of the table. Although the apparatus described in this reference enables a horizontal displacement of the isocenter, which is the intersection of an imaginary line between the x-ray source and the radiation receiver and the extension of the rotational axis of the holding component, such displacement is only possible on one side of the patient, i.e. the stand can only be displaced from the left side of the patient, for example, due to the laterally offset arrangement of the stand. A rotation of the stand at the other side is not possible. This is problematic because access to the patient from the side on which the stand is located, is of necessity only possible in limited fashion. The support at the floor is a further access impediment, since the fastening component that is arranged at the floor and the arm also proceeds near to the floor and thus can be in the way.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an x-ray system of the above-described general type which avoids the aforementioned problems.
This object is achieved in an x-ray system in accordance with the invention wherein the stand is mounted at the ceiling via its arm, and is mounted such that the rotational axis of the arm is arranged substantially in alignment with the center line of the patient table.
In the inventive arrangement support at the floor is forgone in favor of mounting at the ceiling , i.e. not only the fastening component but also the stand arm, in particular, are arranged near the ceiling and thus do not impede access to the patient table. Further, it is inventively provided that the rotational axis of the arm is arranged in alignment with the center line, i.e. the center of the patient table and is not laterally offset thereto as in the aforementioned prior art. This allows the stand, which can be moved in the manner of a scissors blade, can be moved not only from the right side of the patient table but also from the left side of the patient table. Thus, access is no longer limited to one side, as is the case in conventional systems. Depending on the needs of the moment, the C-arm including x-ray means can be selectively positioned on either side. Advantageously, the displacement no longer blocks the access to the patient. Further, the central arrangement of the inventive system with respect to the longitudinal axis of the table enables complete lateral transverse access to the patient, and this is true from both sides of the patient. Thus, the inventive arrangement provides the possibility of being able to arbitrarily cover each area of the patient from either side.
Relative to the patient table, the arm can be arranged at the ceiling such that the rotational axis lies in the area of an end of the table. It is also possible to dispose the rotational axis more in the middle area relative to the center line, i.e. so that the bearing point of the arm, which is at the ceiling, lies above the table.
In order to enable a simple movement and a movement that does not require any effort by attendants, motorized means can be inventively provided for automatic movement-of the stand. In order to also enable manual handling as a backup or augmentation the motorized means can be inventively decoupled.


REFERENCES:
patent: 3803418 (1974-04-01), Holstrom
patent: 4298801 (1981-11-01), Heitman et al.
patent: 5014292 (1991-05-01), Siczek et al.
patent: 5479470 (1995-12-01), Stenfors
patent: 5822814 (1998-10-01), Van der Ende
patent: 44 36 828 (1996-03-01), None

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