摘要:
A mechanically adjustable brake for use with a C-arm x-ray apparatus is generally comprised of a brake handle and an eccentric shaft support which, when rotated using the handle, actuates a cam and presses a brake pad into the C-arm. Movement of the C-arm is thus restricted when the brake is applied. The brake mechanism specifically includes a brake handle, a brake shaft, a cam mounted on the brake shaft, a plunger having a first end engaged with the cam and a second end having a brake. The brake handle is used to rotate the brake shaft and the cam, the cam pushes down on the plunger and the brake engages the C-arm. The brake mechanism further comprises a plunger support, a spring that is compressed when the brake is actuated and is decompressed when the brake is released thus permitting movement of the C-arm. The brake shaft is connected to the brake handle using an eccentric shaft support. The shaft support has an inner aperture having a center offset from the center of the outer perimeter and a plurality of parallel grooves in the outer perimeter of the shaft support that permit removal and advancement of the eccentric shaft support.
摘要:
This invention provides an X-ray CT apparatus which can be mounted in a motor vehicle, trailer, or container, including locking mechanisms for locking at least some of the movable portions of the X-ray CT apparatus, detectors for detecting the locking/unlocking states of the locking mechanisms, and a notifying unit for representing the states of the locking mechanisms on the basis of outputs from the detectors. Collision of an unlocked movable portion with its periphery during traveling can be avoided.
摘要:
An x-ray positioner is provided having two independently articulated arms supporting an x-ray tube and x-ray detector, respectively, that are mounted offset to the patient and controlled to track a bolus travelling through a patient. A controller is provided with feedback information regarding the bolus to determine the rate of travel, and to produce motion signals to the arms to automatically track the movement of the bolus.
摘要:
An X-ray tube device is rotated to a projected portion in a subject by a rotating mechanism for the X-ray tube device according to an operation for an oblique fluoroscopy. A CPU recognizes information about a rotating angle and rotation speed, and a stand for the X-ray tube is moved along a longitudinal direction of a top plate by a driving mechanism for the stand according to the information. An X-ray image detector disposed under the top plate is moved in a direction opposite to the movement of the stand to a corresponding position of the X-ray tube device by a driving mechanism for the X-ray image detector. The X-ray tube device, the projected portion in the subject and the X-ray image detector are always arranged in a straight line by the CPU and the independent driving mechanisms. A tomography may also be carried out by moving continuously the X-ray tube device and the X-ray image detector parallel to the top plate in the opposite directions.
摘要:
Belt tensioner comprising a support, a roller designed to be in contact with the belt to be tensioned, a roller carrier on which the roller is mounted rotationally and which is mounted on the support so as to move back and forth between two extreme positions, a spring arranged between the support and the roller carrier in such a way as to urge the roller carrier continuously from a first to a second of the two extreme positions, a two-way switch mounted on the support in such a way as to be actuated by the roller carrier to occupy a first state only when the roller carrier is at the first extreme position and to pass into the second state when the roller carrier has left this first extreme position under the action of the spring, and means for mounting the support on a base so that the roller carrier occupies the first extreme position only when the belt is intact and has a predetermined tension.
摘要:
A radiography apparatus is constituted by an image pickup unit including an X-ray source for irradiating cone shaped X-ray beams to a patient under examination and an image receptor disposed opposite the x-ray source for receiving x-ray image data of the patient by the irradiated cone shaped x-ray beam; a cylindrical ring which carries the image pickup unit, defines a sufficient space to receive the patient therein so as to permit relative positional change of the patient with respect to the image pickup unit and is supported so as to permit rotation around its center axis; a second arm, an image pickup unit; a first video image processing unit; a second video image processing unit; and a change-over device which changes-over the x-ray image data obtained from the image pickup unit either to the first video image processing unit or to the second video image processing unit, whereby a three-dimensional x-ray image of the patient is obtained depending on necessity during an IVR while temporarily resting or interrupting the IVR.
摘要:
A medical x-ray system, such as an angiography system has an x-ray tube that emits and a radiation receiver, which are arranged at a C-arm, a stand supporting the C-arm, which has an arm that is rotatably mounted at one end around a stationary axis, and a holding device supporting the C-arm, which is rotatably mounted at the other end of the stand, and a patient table The stand is mounted via its arm at the ceiling and is mounted such that the rotational axis of the arm is arranged substantially in alignment with the center line of the patient table.
摘要:
Mini C-arm apparatus for x-ray fluoroscopic imaging having a base or cabinet, an articulated arm assembly connected thereto, a support arm assembly carried by the articulated arm assembly, a C-arm slidably mounted in the support arm assembly, and an x-ray source assembly including an x-ray source and an image receptor assembly including an image receptor respectively mounted at opposed locations on the C-arm such that x-rays emitted by the x-ray source impinge on the image receptor, wherein one of the source and image receptor assemblies includes a control panel that permits activation of predefined functions of the x-ray fluoroscopic imaging apparatus.
摘要:
A virtual C-arm support system 40 is used in a radiographic imaging apparatus of the type including an x-ray source 44 and an x-ray detector 48. The support system includes a first positioning system 42 operatively connected to the x-ray source for selectively positioning the x-ray source in a range of first orientations 120, 140, 170 relative to the examination region E. A second positioning system 46 is operatively connected to the x-ray detector 48 for selectively positioning the x-ray detector in a range of second orientations 122, 142, 172 relative to the examination region E. A control unit 60 is in operative command of at least one of the first and second positioning systems to maintain a predetermined spatial relationship between the x-ray source and the detector for each of the ranges of the first and second orientations relative to the examination region. In a second embodiment, the control unit is in operative command of only the first positioning system, the second positioning system being manually movable. The control unit maintains a predetermined spatial relationship between the x-ray source and detector by moving the x-ray source in response to manual movement of the x-ray detector for each of the ranges of first and second orientations of the source and detector relative to the examination region.
摘要:
A device for moving an X-ray apparatus embodied in the form of a C-bow (9) in a controlled manner, the C-bow (9) being mounted on a pedestal (31) provided with motor-driven rollers (3) controllable in their direction of travel in such a way that it is displaceable in parallel in relation to at least two axes (18;19) and rotatable relative to three axes (18; 19, 21), each movement of the C-bow (9) with respect to a coordinate system (29) which is stationary relative to the room being carried out via controllable drive devices (6;7;37;38). These drive devices (6; 7; 37; 38) are controlled either by means of a control device (39;48) or via a computer (23), said control device being operated either via a sterile control console or by voice control. Any positions and projections of the C-bow (9) that have once been adjusted may be stored in the computer (23), so that a desired position and projection may be reproduced again. If the C-bow 9 is combined with a surgical navigation system which comprises a position detector (27), it is possible, by measuring a reference base that is applied to a patient (12) and is provided with optical markers (28), to consider changes in the position of the patient (12) in such a way that an adjusted position and projection of the C-bow (9) can be reproduced after the patient (12) has changed position.