摘要:
A method for determining the spatial distribution of magnetic resonance signals from at least one of N subvolumes predefines a reception encoding scheme and determines unique spatial encoding for at least one of the subvolumes but not for the entire volume under examination (UV). A transmission encoding scheme is also defined, wherein encoding is effected via the amplitude and/or phase of the transverse magnetization. The temporal amplitude and phase profile of the RF pulses is then calculated and each reception encoding step is carried out I times with variations according to the I transmission encoding steps in the transmission encoding scheme. The method makes it possible to largely restrict the spatially resolving MR signal encoding and image reconstruction to subvolumes of the object under examination without the achievable image quality sensitively depending on imperfections in the MR apparatus.
摘要:
A method for generating a desired temporal profile of the magnetization state in an object under examination (O) during an experiment involving magnetic resonance is characterized in that at least one spatially dependent change in the magnetization state inside the object under examination (O) is predefined and spatially selective radio-frequency pulses, which allow a simultaneous and independent change in the magnetization state at locations with different stipulations, are irradiated in order to implement the predefined spatially dependent change in the magnetization state. The method permits establishment of the same desired temporal profile of the magnetization state for different regions of the object under examination despite different given experimental parameters or deliberate generation of different desired profiles of the magnetization state at different locations.
摘要:
A method for obtaining amplitude and phase dependencies of radio frequency pulses, which are irradiated within the scope of a main magnetic resonance experiment for generating a predetermined n-dimensional spatial distribution (n>=1) of transverse magnetization in an object by means of at least one radio frequency transmitting antenna of a magnetic resonance measuring system in combination with spatially and temporally varying additional magnetic fields which are superimposed on the static and homogeneous base field of the magnetic resonance measuring system and change the transverse magnetization phase in the object in dependence on location and time is characterized in that, prior to performance of the main experiment, a preparational measurement is performed in which the change with time of the transverse magnetization phase in the object under the action of the additional magnetic fields is measured in a position-resolved fashion and the amplitude and phase dependencies of the radio frequency pulses for the main experiment are calculated on the basis of this change with time of the transverse magnetization phase, which is measured in a position-resolved fashion. In this fashion, experimental imperfections in the form of unintentional additional magnetic fields can be measured, taken into consideration and compensated for.
摘要:
A method for determining the spatial distribution of magnetic resonance signals from at least one of N subvolumes predefines a reception encoding scheme and determines unique spatial encoding for at least one of the subvolumes but not for the entire volume under examination (UV). A transmission encoding scheme is also defined, wherein encoding is effected via the amplitude and/or phase of the transverse magnetization. The temporal amplitude and phase profile of the RF pulses is then calculated and each reception encoding step is carried out I times with variations according to the I transmission encoding steps in the transmission encoding scheme. The method makes it possible to largely restrict the spatially resolving MR signal encoding and image reconstruction to subvolumes of the object under examination without the achievable image quality sensitively depending on imperfections in the MR apparatus.
摘要:
A method for obtaining amplitude and phase dependencies of radio frequency pulses, which are irradiated within the scope of a main magnetic resonance experiment for generating a predetermined n-dimensional spatial distribution (n>=1) of transverse magnetization in an object by means of at least one radio frequency transmitting antenna of a magnetic resonance measuring system in combination with spatially and temporally varying additional magnetic fields which are superimposed on the static and homogeneous base field of the magnetic resonance measuring system and change the transverse magnetization phase in the object in dependence on location and time is characterized in that, prior to performance of the main experiment, a preparational measurement is performed in which the change with time of the transverse magnetization phase in the object under the action of the additional magnetic fields is measured in a position-resolved fashion and the amplitude and phase dependencies of the radio frequency pulses for the main experiment are calculated on the basis of this change with time of the transverse magnetization phase, which is measured in a position-resolved fashion. In this fashion, experimental imperfections in the form of unintentional additional magnetic fields can be measured, taken into consideration and compensated for.
摘要:
Modular system for assembling electromechanically adjustable supporting devices for upholstery of furniture for sitting or lying upon, particularly for bed mattresses. The supporting devices, when assembled, have at least two supporting parts, which can be displaced relative to one another and which serve to support the upholstery. Modular system includes first and second longitudinal member subassemblies joined together, forming a base body of supporting device. Modular system includes an electromechanical drive for displacing the supporting parts relative to one another, and a control device for controlling the electromechanical drive. First and second electromechanical drive units are assigned to respective first and second longitudinal member subassemblies, and the first and second electromechanical drive units are usable together and brought into active connection with the same supporting part of the supporting device for displacing it, and the control device synchronously controls the first and second electromechanical drive units.
摘要:
The present invention relates to substituted cyclopentene compounds of the general formula I, to a process for the production thereof, to pharmaceutical preparations containing these compounds and to the use thereof for the production of pharmaceutical preparations.
摘要:
Modular system for assembling a motorized adjustable support apparatus for the upholstery of a piece of furniture for one of sitting and lying includes a first support element including a first longitudinal rail assembly, and a second support element including a second longitudinal rail assembly. The first and second longitudinal rail assemblies are detachably connected by a connecting element to form a base of the support apparatus, in use. The assembled adjustable support apparatus includes the two support elements adjustable relative to one another for supporting the upholstery. A connecting shaft is provided for transmitting the rotation of a first pivot shaft connected to the first rail assembly to a third pivot shaft connected to the second rail assembly. Ends of the connecting shaft are detachably insertable into recesses defined in the first and third pivot shafts, and are securable against rotation.
摘要:
Bifunctional urokinase variants possessing improved fibrinolytic properties and thrombin inhibitory activities, plasmids used in the production of these polypeptides, as well as thrombolytic agents containing one of the bifunctional urokinase variants as active ingredient are described.