Abstract: Medical apparatus includes a stand with an approximately L-shaped arm having a first portion (1) and a second portion (3) which extends approximately perpendicularly to the first portion and a free end of which supports at least one medical apparatus (7, 9). The first portion (1) has a free end which is connected, to, for example a floor (13) of an examination space via, a bearing (17), in such a manner that it can be rotated from a neutral position in opposite directions through an angle of .DELTA. radians in a plane of rotation parallel to the floor. A bundle of cables (21) extends from a space (19) at the side of the floor (13) which is remote from the examination space to parts of the device. The bundle of cables (21) is shaped approximately as a flat ribbon having a largest thickness t equal to the thickness of the thickest cable and a width w equal to the sum of the thicknesses of the cables.

Abstract: A simple and robust X-ray stand for angio graphic examinations is obtained by rotatably suspending a U-shaped or C-shaped carrier from an L-shaped arm which is connectd to a vertical column so as to be rotatable about two orthogonal intersecting axes of rotation at the column. The irradiation directions can be readily adjusted by hand when a counterweight is connected to the arm.

Abstract: An x-ray examination apparatus in which an opposed x-ray source and x-ray image detector, which establish a radiation vector and an image orientation direction traverse to said vector, are mounted to be positioned relative to a series of three independently operable axes of rotation. Computing and measuring means are provided by which angular positions of rotation about the various axes can be correlated to simultaneously achieve both a desired angular orientation of the radiation vector and a desired direction of image orientation.

Abstract: An X-ray examination apparatus incorporating digital image subtraction in which from a series of images to be formed of an object with and without contrast medium those images are selected for subtraction which result in ultimate images which combine a low motional unsharpness with adequate contrast. Images are also formed on at least one of the edges of the contrast bolus, so that in each position several contrast images can be formed with a single contrast bolus.

Abstract: A medical apparatus comprising a displaceable vertical column 1 along which there can be slid a support 23 in which an arm 25 is rotatable about a first horizontal axis. Secured to the arm 25 and rotatable about a second horizontal axis parallel to the first horizontal axis, is an examination device which comprises a combination of a radiation source 81 and a radiation detector 83. Said combination is mounted on a C-shaped frame 63 which is displaceable circumferentially about an axis which lies at right angles to both horizontal axes. The two translatory displacements and the three rotary displacements of the apparatus can be performed individually by means of corresponding variable speed motor drives whose operation can, however, be coordinated if desired.The medical apparatus is particularly suitable for so-called isocentric examinations of the vascular system.

Abstract: A counterbalanced support, for example for supporting a patient or a radiation source in X-ray diagnosis or therapy, comprises a supporting frame movably mounted on a base by means of a parallelogram linkage. This linkage comprises two parallel rods which are pivotally connected to the supporting frame and the base. One of the rods has an arm formed thereon. A constant force is applied to the arm for counterbalancing the weight of the supporting frame and its load. This force is supplied by a pneumatic pulling device via apparatus which are freely movable with respect to the base, so that a substantially constant pulling force is exerted on the arm in a direction which extends at a fixed angle to the vertical.

Abstract: The invention relates to a patient support comprising supporting elements which are connected at facing ends by means of a single coupling rod which is pivotably connected to the ends of the elements. Each element is also pivotably connected, at a location which is situated at some distance from the end connected to the coupling rod, to one of two parallel shafts mounted on a frame. During pivoting of the supporting elements, the length of the supporting surface available for a patient changes, so that a supported patient virtually does not slide at all across the supporting elements during this pivoting movement.