Abstract: The invention relates to a color lighting device comprising at least one light-emitting source (1a, 1b, 1c) fixed on a common substrate (3), each light-emitting source (1a, 1b, 1c) comprising at least one light-emitting diode (LED) (1a, 1b, 1c), each light-emitting source (1a, 1b, 1c) comprising one photosensor (2a, 2b, 2c) that detects the light output only of the associated light source (1a, 1b, 1c), and each light-emitting source (1a, 1b, 1c) being connected to an analog control circuit (4a, 4b, 4c) that controls the drive of each light-emitting source (1a, 1b, 1c) separately on the basis of a light output detected by the associated photosensor (2a, 2b, 2c), while each control circuit (4a, 4b, 4c) comprises a comparator (5a, 5b, 5c) connected to the associated photosensor (2a, 2b, 2c).

Abstract: An MRI apparatus that includes an open magnet system with pole pieces (14, 16) for generating a steady B0 magnetic field in an examination zone (13). Gradient coil systems (18, 20) are disposed above and below the examination zone (13) and adjacent the pole pieces. First and second resonators (22, 24) are disposed between the gradient coil systems (18, 20) and the examination zone (13). RF screens (26, 28) are disposed between the gradient coil systems (18, 20) and the planar resonators (22, 24). The planar resonators each include a central conductor (30), such as a circular plate and an annular ring (32) surrounding and co-planar with the central conductor. Radial rungs (33) connect and are co-planar with the central conductor and annular ring. Capacitors (34), preferably numbering in the thousands, interrupt the rungs.

Abstract: The invention relates to a device (1) for recharging batteries, the device having a circuit, which comprises at least a first coil (8) in a first layer (17) and at least a second coil (21) in a second layer (19). The coils (4-16, 21-25) in accordance with the invention have magnetic fields in opposite directions (28, 29). The magnetic fields in opposite directions cancel each other out in the remote range. Hence, an unintentional effect on biological and electromechanical systems is avoided.

Abstract: Colour point control system (1) comprising a LED device (2) comprising a plurality of light-emitting diodes (3a,3b,3c,3d) emitting a first light, said diodes (3a,3b,3c,3d) fixed on a substrate (4), a layer (5) on at least one light-emitting diode (3a,3b,3c,3d) capable to convert at least a first portion of the first light into a second light, only one photo-sensor (6) for measuring a second portion of the first light of each single diode (3a,3b,3c,3d) during a turn-off time where all other diodes are turned-off, and a controller (9) for sequentially turning-off said diodes (3a,3b,3c,3d) except one single diode (3a, 3b, 3c, 3d) and for comparing the second portion of the first light of each single diode (3a,3b,3c,3d) measured by the photo-detector (6) to a default value and to adapt the emitted second portion of first light of each single diode (3a,3b,3c,3d) to said default value.

Abstract: A device for measuring a volume flow, especially a tidal volume flow sensor, with a flow channel (1) and with a sensor element (6) arranged within the flow channel (1), is shown and described. The task of providing such a device, in which the sensor signal, which is generated by sensor elements arranged in the flow channel, remains as free as possible from distortions during the transmission to an evaluating unit, is accomplished by providing an internal circuit (3), which is arranged within the flow channel (1) and includes the sensor element (6). An external circuit (7) is arranged outside the flow channel (1). The external circuit (7) is designed for contactless, inductive coupling with the internal circuit (3) for supplying same with energy and for reading.

Abstract: A radio frequency receive coil (50) includes an antenna (52, 52?) that is tuned to a magnetic resonance frequency to detect a magnetic resonance signal. Electronics (54) disposed on or with the antenna (52, 52?) as a unitary structure include compression circuitry (102, 114, 202, 214, 230, 330, 430, 530) that compresses the magnetic resonance signal at a gain controlled by a gain control signal to produce a compressed magnetic resonance signal. The electronics (54) generate a reduced dynamic range representation of the magnetic resonance signal based on the compressed magnetic resonance signal. The reduced dynamic range representation of the magnetic resonance signal is communicated off the receive coil.

Abstract: As disclosed herein, in a parallel magnetic resonance imaging method core magnetization is excited in an examination volume of a magnetic resonance (MR) device by generating at least one high frequency (HF) pulse. Two or more MR signals are recorded in parallel from the examination volume via two or more receiving channels (R, S) of the MR device using an HF coil arrangement (9), which comprises a number of coil elements (15, 16) which is greater than the number of receiving channels (R, S), wherein the respective MR signal on each receiving channel (R, S) is formed by weighted superimposition of coil signals (A, B, C, D, B) of the individual coil elements (15, 16). An MR image is reconstructed from the recorded MR signals, the MR signals being combined with one another taking into account effective spatial sensitivity profiles associated with the individual receiving channels (R, S).

Abstract: Provided is a trim panel suitable for attachment to a displaceable seat, and a seat. The seat has a seat substructure with a first part and a second part and a seat component. The seat component is moveable with the first part in a horizontal direction relative to the second part of the seat substructure and displaceable relative to the first part in a second direction. The trim panel is configured to be attached to the seat component and to be displaceable with the seat component for concealing parts of the seat substructure from normal viewing angle by a user.

Abstract: An MRI apparatus that includes an open magnet system with pole pieces (14, 16) for generating a steady B0 magnetic field in an examination zone (13). Gradient coil systems (18, 20) are disposed above and below the examination zone (13) and adjacent the pole pieces. First and second resonators (22, 24) are disposed between the gradient coil systems (18, 20) and the examination zone (13). RF screens (26, 28) are disposed between the gradient coil systems (18, 20) and the planar resonators (22, 24). The planar resonators each include a central conductor (30), such as a circular plate and an annular ring (32) surrounding and co-planar with the central conductor. Radial rungs (33) connect and are co-planar with the central conductor and annular ring. Capacitors (34), preferably numbering in the thousands, interrupt the rungs.

Abstract: A magnetic resonance imaging apparatus is provided with one or more electrical accessory devices, for example, catheters (10) or RF body coils (6), which are intended for use during the examination of an object, as well as with a connection lead (13) which is arranged so as to extend through an examination zone (1) of the magnetic resonance imaging apparatus, which zone can be exposed to an RF field, and to connect the accessory device to a connection unit (12). In order to avoid heating of the connection lead (13) due to currents induced in the connection lead by the RF field, which currents could lead to injury of a patient or damage of the accessory device or the connection unit (12), the connection lead (13) comprises at least one lead segment (131, 132, . . . ) which has a length which is limited by at least one inductive coupling element, e.g. a transformer (141, 142, . . . ; 161, 162, . . . ) and is unequal to n*/2, where denotes the RF wavelength and n=1, 2, 3, . . . .

Abstract: The invention relates to a parallel magnetic resonance imaging method, in which core magnetization is excited in the examination volume of an MR device by generating at least one HF pulse. Two or more MR signals are then recorded in parallel from the examination volume via two or more receiving channels (R, S) of the MR device using an HF coil arrangement (9), which comprises a number of coil elements (15, 16) which is greater than the number of receiving channels (R, S), wherein the respective MR signal on each receiving channel (R, S) is formed by weighted superimposition of coil signals (A, B, C, D, E) of the individual coil elements (15, 16). Finally, according to the invention, an MR image is reconstructed from the recorded MR signals, the MR signals being combined with one another taking into account effective spatial sensitivity profiles associated with the individual receiving channels (R, S).

Abstract: A transmission cable for use in a magnetic resonance apparatus is provided. The transmission cable includes a plurality of cable segments (200n). The cable also includes a plurality of couplers each of which transforms a first signal carried by a first cable segment into an acoustic signal and from the acoustic signal into a second signal carried by a second cable segment.

Abstract: The use of standard coaxial cables for, e.g. connecting optional receive MR coils to MR-scanners has the problem that parasitic cable resonances may occur, which may cause RF burns to a patient. According to the present invention, the cable is divided into a huge number of small pieces. Each conductor in the small pieces is connected to the respective conductor in another small piece via a series capacitor. Due to this, e.g. at MR frequency, the cable according to the present invention is completely off resonant, such that no parasitic resonance may occur.

Abstract: A device for measuring a volume flow, especially a tidal volume flow sensor, with a flow channel (1) and with a sensor element (6) arranged within the flow channel (1), is shown and described. The task of providing such a device, in which the sensor signal, which is generated by sensor elements arranged in the flow channel, remains as free as possible from distortions during the transmission to an evaluating unit, is accomplished by providing an internal circuit (3), which is arranged within the flow channel (1) and includes the sensor element (6). An external circuit (7) is arranged outside the flow channel (1). The external circuit (7) is designed for contactless, inductive coupling with the internal circuit (3) for supplying same with energy and for reading.

Abstract: The invention relates to a catheter which is suitable in particular for use in MR imaging. In order to avoid undesirable heating of the tissue surrounding the catheter by the MR excitation field, the catheter in accordance with the invention comprises: a catheter sleeve (2), a hollow guide channel or lumen (3) within the catheter sleeve (2) for the introduction of a medical instrument, and two electrical conductors (4) which are enclosed by a cable sheath (5) of a dielectric material and serve to transmit RF signals within the catheter envelope (2), the dielectric material having a relative permittivity (?r?) smaller than 4, the diameter of the electrical conductors (4) being between 5 and 50 ?m, notably between 10 and 30 ?m, and the distance between the electrical conductors (4) being smaller than 300 ?m, in particular smaller than 200 ?m.

Abstract: A magnetic resonance imaging apparatus is provided with one or more electrical accessory devices, for example, catheters (10) or RF body coils (6), which are intended for use during the examination of an object, as well as with a connection lead (13) which is arranged so as to extend through an examination zone (1) of the magnetic resonance imaging apparatus, which zone can be exposed to an RF field, and to connect the accessory device to a connection unit (12). In order to avoid heating of the connection lead (13) due to currents induced in the connection lead by the RF field, which currents could lead to injury of a patient or damage of the accessory device or the connection unit (12), the connection lead (13) comprises at least one lead segment (131, 132, . . . ) which has a length which is limited by at least one inductive coupling element, e.g. a transformer (141, 142, . . . ; 161, 162, . . . ) and is unequal to n*/2, where denotes the RF wavelength and n=1, 2, 3, . . . .

Abstract: A coil system (210) for an apparatus operating in conformity with the spin resonance or magnetic resonance (MR) method encloses an examination space (217) which extends along an axis (218) and is intended to receive a patient (215). It includes an inner RF coil (219), an inner sub-coil (213?) which externally encloses the RF coil (219) and projects beyond the RF coil (219) in the axial direction at both sides, and an active shield (212) which externally encloses the inner sub-coil (213?) and constitutes a gradient coil arrangement in conjunction with the inner sub-coil (213?). For specified gradients, the energy required for the gradient coil arrangement (213?, 212) in such a coil system is reduced in that the volume occupied by the inner sub-coil (213?) is extended in the axial direction by way of regions extending beyond the RF coil (219) in the direction of the axis (218).

Abstract: The invention relates to an open MR system in which the magnetic RF field is to be adjusted at will in respect of field profile. This is achieved in accordance with the invention by providing an RF coil system for the transmission and/or reception of RF signals, which RF coil system includes two RF coil arrays which are arranged on opposite sides of the examination zone, each RF coil array including at least two RF coils which are decoupled from one another and are connected to a respective channel of a transmit/receive unit. The invention also relates to a corresponding planar RF coil array.

Abstract: A coil system (210) for an apparatus operating in conformity with the spin resonance or magnetic resonance (MR) method encloses an examination space (217) which extends along an axis (218) and is intended to receive a patient (215). It includes an inner RF coil (219), an inner sub-coil (213?) which externally encloses the RF coil (219) and projects beyond the RF coil (219) in the axial direction at both sides, and an active shield (212) which externally encloses the inner sub-coil (213?) and constitutes a gradient coil arrangement in conjunction with the inner sub-coil (213?). For specified gradients, the energy required for the gradient coil arrangement (213?, 212) in such a coil system is reduced in that the volume occupied by the inner sub-coil (213?) is extended in the axial direction by way of regions extending beyond the RF coil (219) in the direction of the axis (218).

Abstract: The invention relates to an MR apparatus that is provided with an open magnet system and a quadrature coil system that includes a resonator that is tuned by tuning capacitors on at least one of the two sides of the steady magnetic field, said resonator including two large-area electrical conductors that are situated at a distance from one another and are connected to one another in a number of connection points that are distributed along the circumference, and are also provided with at least two terminals that are distributed along the circumference in order to receive or generate RF magnetic fields that are mutually offset in phase. The invention also relates to a corresponding quadrature coil system.