Abstract: An elongated radioactive element to be fastened to one end of an elongated wire-shaped element, and provided with a front retaining part, a connecting part, and a rear retaining part, as well as segment-shaped elements which are radioactive or are to be made radioactive, which are provided with a center bore and which, enclosed between the front and rear retaining parts, are placed, one behind the other, by means of the center bore over the connecting part and can tilt with respect to each other, all in such a manner that the radioactive element is an elongated member which is supple and flexible over the greatest part of its length, coupling means being provided for connecting the radioactive element to the elongated wire-shaped element.

Abstract: An electrode assembly for stimulating or detecting activity of muscles accessible through a body orifice includes a carrier member having contact elements electrically connected to a detecting or stimulation assembly and an elongated sheath member formed of a rigid insulating material and having a handle portion and an insertion portion. The insertion portion has electrical contact elements including contact lips extending outwardly from the insertion portion. The elongated sheath member is positioned on the carrier member so that the contact lips are in electrical contact with the contact elements of the carrier member and the contact lips project radially into the sheath member and are resiliently supported in an axial direction against the contact elements of the carrier member.

Abstract: A device for medical radiation therapy uses in the treatment area a deformable carrier mat (1) which can be placed on the patient. This carrier mat (1) has prefabricated mounting channels (7) running inside its mat plane to accommodate or to insert the guide sleeves (2), in which an essentially point-shaped radiation source (5) can be displaced and positioned. The carrier mat (1) is made of one piece from silicone or a silicone-like material which can be autoclaved. The carrier mat (1) is constructed from a plurality of spheres (9) or rounded, sphere-like, ball-shaped bodies (9a) which are provided adjacent to each other and are connected with each other by means of collar sections (8), while the mounting channels (7) run through the spheres (9) and/or the collar sections (8). Due to this even in the case of a minimum thickness of the carrier mat (1) a particularly good mobility and shape adaptability is present.

Abstract: There is disclosed a display system to be attached to a head of the user or to a helmet to be positioned on the head of the user. The display system comprises an image intensifier unit having an input for receiving an image and an output for retransmitting the image with enhanced intensity and within a predetermined first frequency band. The display system further comprises an eye piece composed of a first and second transparent reflecting element having angle- and frequency-dependent reflectants and transmittance properties wherein such properties in combination with the first frequency band result in an intensified image emerging via the eye piece. The display system further is provided with an image display device for transmitting a visible video image in the direction of the eye piece.

Abstract: There is disclosed a device for measuring the respiration of a person and is provided with a strap which can be applied to fit around the upper part of the body of the person and includes a detector for measuring the variation and the circumference of the upper body caused by respiration for generating a measurement signal corresponding to the variation measured by the detector for controlling a display device.

Abstract: Endoscopic probe in particular suitable for use as a TEE-probe, comprising a flexible tube having at one end a probe head which is provided with ultrasonic transducer means of the phased array type with a transducer made up of a number of elongated transducer elements which elements can be individually electrically controlled by means of cables connected to the individual elements and extending through the flexible tube in which the transducer is mounted in an essentially cylindrical transducer housing which is placed in a cavity in the probe head and is rotatable about a longitudinal axis extending at right angles to the longitudinal axis of the probe head, by means of drive means interacting with the transducer housing while the elongated transducer elements are connected by means of flexible conductors to the cables extending through the flexible tube and in which the cavity in the probe head is sealed with an acoustically transparent head and the transducer is coupled acoustically to the fixed cap by mean

Abstract: A slit radiography apparatus is provided with an absorption device comprising electrically controllable piezoelectric tongues. Upper and/or lower deflections of the tongues are limited to a maximum by trips outside the X-ray fan beam. More than one strip can be present as seen in the length direction from the fixed ends of the tongues. Thus deflections of the tongues are limited and great phase changes in the control signals without resultant oscillations can take place during the time the tongue are restricted in their movement by the strip.

Abstract: Sanitary seat on which the disabled or the elderly can sit to wash--or have washed--parts of their lower body. The seat (61) comprises two parts, an inner part (64) and an annular part (62), which can be moved relative to each other in the vertical direction. When the inner part (64), is projecting above the annular part (62), the part of the lower body projecting outside the inner part can be washed. When the inner part (64), is below the annular part (62), the particular person is sitting on the annular part (62). In that situation the other part on which the person was first seated can be washed. The inner part (64) is preferably provided with a spray head, and the inner part (64) with a downward projecting part of the annular part (62) preferably forms a watertight seal for forming a space which can be filled with water in which the lower body can be cleansed.

Abstract: A method and apparatus for connecting a first end part of a cable to a drive unit, this cable carrying at its second end part an element, such as a source of radiation, which can be moved through a guide tube, wherein there are provided at least two first end parts with a different mechanical identification in the form of recesses, thickenings, projections or the like, and there being provided a number of different connector elements, corresponding to the number of different end parts, the connector elements each having locking means which can only cooperate with an end part provided with a particular mechanical identification, whilst a cable with a first end part provided with a mechanical identification associated with the desired element to be displaced is chosen and is inserted into a matching connector element, whereafter the first end part is locked in the relevant connector element by means of the locking means.

Abstract: There is disclosed a device for effecting iontophoresis treatment on a patient including a signal generator for generating the treatment signal and having an output stage including two electrodes for connecting to a patient wherein the signal generator generates a treatment signal of a pulsed direct current having a frequency of at least 1 kHz at a duty cycle of at least 80%.

Abstract: A manipulator assembly for an endoscope includes a housing for a pair of control cables, first and second gear members disposed for rotation within the housing, and an endless toothed belt member coursed about such gear members and connected to the control cables. A control knob is provided for rotating the first gear member and a stepping assembly engages the second gear member for effecting a stepwise movement of the endless belt. The stepping assembly includes a knurled disc coupled to the second gear member and a resilient element engaging the knurled disc. A control element is provided outside of the housing for disengaging the stepping assembly. The control element includes a cam disc for disengaging the resilient element from the knurled disc.

Abstract: An integrated semiconductor circuit for use in a low voltage (1.5-2 V) battery operated device is provided with a protection circuit against reverse connection of the battery.The protection circuit takes care that the substrate is always connected to one extreme potential and a region containing one or more resistors is always connected to the other extreme potential irrespective of the proper or reverse mode of connection of the battery. The protection circuit has been designed in such a way that no voltage drop occurs between the battery connections and the supply voltage connection terminals of the integrated semiconductor circuit.

Abstract: A device for determining a control signal for an image observation system including an image intensifier and an image converter wherein the control signal is representative of the contrast range of an output signal of the image converter and with control elements for adjusting the gain of the image intensifier and the gain of the image converter in a manner whereby the control signal at a value representative of a large contrast range in the output of signal of the converter results in higher adjustment gain of the image intensifier and a lower adjustment gain to the image converter and where the control signal at a value representative of a low contrast range in the output signal of the image converter results in lower adjustment gain to the image intensifier and higher adjustment gain to the image converter.

Abstract: There is disclosed an assembly for slit radiography with image equalization, comprising a two-dimensional dosimeter for detecting the amount of X-rays transmitted through a body. During a scan different parts of the dosimeter detect the transmitted X-rays. Thereto a system of essentially parallel electrodes is present. The parallel electrodes extend in the direction of scanning and are connected to a control device for forming control signals for the adsorption device.

Abstract: An endoscopic probe suitable for use as a TEE-probe, comprising a flexible tube having at one end a probe head which is provided with a phased array ultrasonic transducer with a number of elongated transducer elements which can be individually electrically controlled by cables connected to the individual elements and extending through a flexible tube in which the transducer is mounted in a cylindrical transducer housing, which is in a cavity in the probe head and is rotatable about a longitudinal axis extending at right angles to the longitudinal axis of the probe head, by means of a drive means interacting with the transducer housing while the elongated transducer elements are connected by flexible conductors to the cables extending through the flexible tube and in which a convex acoustic lens is mounted on the transducer and the peripheral edge of the lens interacts in a sealing manner with the edge of the cavity in the probe head and can rotate together with the transducer relative to the probe head.

Abstract: In an equalization radiography device an X-ray fan beam (3,4) is used to scan a body (7) under examination. The X-ray fan beam comprises a number of adjacent sectors. A modulator device (5) comprising a number of controllable beam sector modulators is present for controlling per sector the quantity of X-ray radiation transmitted. A detector (11) placed behind the body generates per sector a measurement signal representing a desired position of the beam sector modulator for that sector. During operation the instantaneous position of each beam sector modulator is continuously detected (20,21). Signals representing those positions are generated and compared with the respective measurement signals. Control signals are derived from the comparisons to control the positions of the respective beam sector modulators.

Abstract: An array comprising at least one row of ultrasonic elements when energized generates a pressure pattern having side lobes when viewed in the lateral direction. Those side lobes give rise to undesirable grating lobes. The side lobes in both transverse and lateral direction can be suppressed by having identical and identically arranged ultrasonic elements (14) the width of which, viewed in the lateral direction, is greater than the pitch of the consecutive ultrasonic elements in the row.

Abstract: An image intensifier tube is provided with a channel plate. The channel plate's channels are open both at the cathode side and at the anode side. A high frequency alternating electric field is generated in the space between the cathode and the channel plate. Thereby during a first period of the cycles of the alternating electric field the photoelectrons emitted by the photocathode traverse the space between the photocathode and the channel plate. During a second period of the cycles of the alternating electric field, in which second periods the polarity of the electric field is reversed with respect to the polarity during the first period, any ions that may have emerged from the channels into the space between the photocathode and the channel plate are drawn back to the channel plate.

Abstract: A slit radiography assembly including an X-ray source, and X-ray detector and a slit diaphragm comprised of a plurality of sections juxtaposed in the longitudinal direction of the slit and coacting with controllable attenuation elements wherein: during scanning, a detection assembly includes a plurality of response sections cooperate with the X-ray detector to provide an electric signal representative of the intensity to control the attenuation elements during scanning at initial measuring exposure and subsequent radiographical exposure of the body.

Abstract: Anti-veiling-glare glass input window for an optical device. The window has throughout a shallow surface layer over its peripheral surfaces radiation absorbent free-metal-induced color centers. A method for preparation of such a window, such is particularly suited to be used as an input window for an image intensifier, involves pre-shaping the window from clear glass and forming color centers in a shallow surface layer over at least the peripheral surfaces of the window. If the clear glass contains reduceable metal oxides the color centers are formed by subjecting at least the peripheral surfaces of the clear glass to a reducing atmosphere at a temperature high enough to cause the reducing atmospheres reducing component to diffuse into a shallow surface layer of the window and to reduce the metal oxides to free metal atoms.