| Bruker BioSpin MRI GmbH Patent applications |
| Patent application number | Title | Published |
|---|
| 20110234227 | Designing a time dependency for a k-space trajectory, in particular a spiral - A method for designing the time dependence function k | 09-29-2011 |
| 20110199083 | Interference compensation in MR measurements on moving objects through adjustment of the measurement conditions - A method for generating magnetic resonance (MR) images or MR spectra of at least one partial area ( | 08-18-2011 |
| 20100292562 | Method for generating MR (Magnetic resonance) images of a moving partial area of an object - A method for generating MR (magnetic resonance) images of a moving partial area of an object with a repeating motion sequence over comparable motion states, wherein an MR data set, which is encoded for generating an individual MR image of the object, is provided for each motion state from a plurality of successive individual MR measurements with shorter time intervals than a repetition rate of the motion sequence, and wherein at least one navigator data point is generated for each individual MR measurement as an indicator for the comparability of several motion states, is characterized in that a position of the partial area is determined for each individual MR image, from which a function f(t) of the time shift of the position is determined, and the measuring data of the individual MR measurement is phase-corrected in correspondence with its respective motion state using the function f(t) to keep the position of the partial area in a spatially stationary state. This permits observation of a moving partial area irrespective of its motion state, such that rapid changes within the partial area can be observed. | 11-18-2010 |
| 20100253336 | Method for obtaining amplitude and phase dependencies of RF pulses for spatially selective excitation - 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. | 10-07-2010 |
| 20100244827 | Simultaneous excitation and acquisition in magnetic resonance - A method for magnetic resonance spectroscopy (=MRS) or magnetic resonance imaging (=MRI) in which an NMR time-domain signal is created by an RF excitation pulse applied to an object in the presence of an applied magnetic field that may depend on spatial position and/or time, the time-domain signal being generated by an excited transverse nuclear magnetisation precessing about the applied magnetic field, whereby the RF excitation pulse is adapted to cover a whole range of NMR frequencies of interest present in the object, and time-domain signal acquisition takes place during, or during and after the application of the RF excitation pulse, is characterized in that spectral or image data are reconstructed by a matrix product of a reconstruction matrix and a vector of time-domain signal points, the reconstruction matrix being an inversion of an encoding matrix A | 09-30-2010 |
| 20100237861 | Method for mapping of the radio frequency field amplitude in a magnetic resonance imaging system using adiabatic excitation pulses - A method for determining the spatial distribution of the magnitude of the radio frequency transmission field B1 in a magnetic resonance imaging apparatus, wherein the method comprises performing an MRI experiment in which a B1-sensitive complex image (SI) of a sample is obtained, wherein the phase distribution within the B1-sensitive complex image (SI) depends on the spatial distribution of the magnitude of the field B1. For establishing the dependency of the phase distribution within the B1-sensitive complex image (SI) on the spatial distribution of the field B1, one or more adiabatic RF pulses are applied. The method provides a simple procedure for mapping the B1 field of a magnetic resonance imaging apparatus with an improved accuracy and a wider measurement range. | 09-23-2010 |
| 20090273345 | Method for determining the spatial distribution of magnetic resonance signals with use of local spatially encoding magnetic fields - A method for determining the spatial distribution of magnetic resonance (MR) signals from an imaging region within MSEM regions of a local gradient system, wherein, in a preparatory step, a spatial encoding scheme is defined; in an execution step, nuclear spins are repeatedly excited with RF pulses, and thereafter spatially encoded according to the spatial encoding scheme, in at least one dimension by means of the local gradient system, and MR signals are acquired, from which the spatial distribution is calculated, visualized and/or stored, | 11-05-2009 |
