摘要:
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.
摘要:
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.
摘要:
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, . . . .
摘要:
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.
摘要:
A motor vehicle seat has a base element which can be fastened in the motor vehicle, a seat element which is disposed on the base element, and a backrest element which is disposed on the seat element. The seat can be adjusted between a locked position and an unlocked position. In the locked position, the seat element and the backrest element can be used for normal sitting. In the unlocked position, the seat element and/or the backrest element are adjusted in the vehicle to the front with respect to the driving direction far enough so that a space arranged behind the seat with respect to the driving direction is accessible for loading and unloading. For adjustment between the locked position and the unlocked position, the seat element is swivellably disposed on the base element and/or the backrest element is swivellably disposed on the seat element. In order to reduce stress on the seat during a restoring movement from the unlocked position to the locked position, damper devices are provided in order to counteract the restoring movement at least during its end phase.
摘要:
An adjustable vehicle seat has an upholstered seat frame and an upholstered back frame. The seat frame is mounted on the vehicle frame independently of the back frame and is adjustable in a heightwise, longitudinally and in an inclined manner with respect to the vehicle frame. The upholstery is displaceable with respect to the seat frame, as well as the back frame.
摘要:
A method and a System to obtain a more realistic image of an object by acquiring a plurality of e.g. monochromatic images without increasing the structure of a, for example, charged coupled device array by a sequential acquisition of the images by using a color sequential flash.
摘要:
In a combined system, a magnetic resonance (MR) scanner includes a magnet configured to generate a static magnetic field at least in a MR examination region from which MR data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region. The radiation detectors include electron multiplier elements having a direction of electron acceleration arranged substantially parallel or anti-parallel with the static magnetic field. In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces disposed on opposite sides of a magnetic resonance examination region, and the radiation detectors include first and second arrays of radiation detectors disposed with the first and second spaced apart magnet pole pieces.
摘要:
In a combined system, a magnetic resonance (MR) scanner includes a magnet configured to generate a static magnetic field at least in a MR examination region from which MR data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region. The radiation detectors include electron multiplier elements having a direction of electron acceleration arranged substantially parallel or anti-parallel with the static magnetic field. In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces disposed on opposite sides of a magnetic resonance examination region, and the radiation detectors include first and second arrays of radiation detectors disposed with the first and second spaced apart magnet pole pieces.
摘要:
A radiation detector comprises: a substrate (54); a two-dimensional array of solid state detector elements (50) disposed on or in the substrate and defining a detector array area (52); electrodes (Ec, Ea) disposed on or in the substrate; and electrically conductive connecting lines (60, 64) disposed on or in the substrate and operatively electrically connecting the solid state detector elements and the electrodes, the electrically conductive connecting lines arranged to define a maximum area in conjunction with any one conducting solid state detector element that is less than or about one tenth of the detector array area. An imaging system comprises an MR scanner (10) and a PET or SPECT imaging system arranged to have some interaction with a magnetic field generated by the MR scanner, the PET or SPECT imaging system including scintillator elements (40) and the aforesaid radiation detectors arranged to detect scintillations generated in the scintillator elements.