Abstract: A spectroscopic magnetic resonance imaging method involves sub-sampling in the k space. For example, the SENSE technique is applied in spectroscopic MR imaging. Such sub-sampling is also applied in three-dimensional MR imaging.

Abstract: A magnetic resonance imaging method employs sub-sampled signal acquisition from a number of receiver coils such as surface coils. A full field-of-view magnetic resonance image is reconstructed on the basis of the sensitivity profiles of the receiver coils, for example on the basis of the SENSE technique. The reconstruction is carried out mathematically as an optimization, for example, requiring a minimum noise level in the magnetic resonance image. According to the invention, a priori information is also involved in the reconstruction and the a priori information is taken into account especially as a constraint in said optimization.

Abstract: A novel magnetic resonance method for two-dimensional or three-dimensional imaging of an examination zone is described, in which k-space is scanned at predetermined sampling positions. Magnetic resonance signals of a first data set over k-space and magnetic resonance signals of subsequent reduced data sets over part of k-space are acquired, and data of the subsequent reduced data sets are completed with data of the first data set in order to obtain a full image of the scanned object. The acquisition of data of the subsequent reduced data sets (d2, d3, d4) will start or end with the highest value in k-space. Further a novel magnetic resonance apparatus and a computer program product are described, which are designed for performing the above mentioned method.

Abstract: A magnetic resonance imaging system is provided with a system of emission antennae (13), for example, emission coils, for generating RF excitation pulses. Such RF excitation pulses generate magnetic resonance signals from an object to be examined. The system of emission antennae has a spatially inhomogeneous emission profile. The inhomogeneous emission profile is used for the partial spatial encoding of the magnetic resonance signals in addition to the encoding on the basis of magnetic gradient fields. The magnetic resonance image is reconstructed on the basis of the inhomogeneous emission profile.

Abstract: A magnetic resonance imaging method is proposed wherein the MR signal acquisition is performed by separate scanning of central (40) and peripheral (70) sectors. Central and peripheral sectors are selected in an individual plane in the k-space and optionally an intermediate sector (50) between the peripheral and central sectors is also selected. The center (O) in the k-space in the individual plane at issue is situated within the central sector. The scanning of the k-space commences outside the center of the k-space and before or during increasing contrast. Preferably, the scanning is timed such that the center of the k-space is reached at maximum contrast (MR angiography) or at the value zero of the longitudinal magnetization (MR inversion recovery). The central sector is advantageously scanned in a stochastic order. The peripheral sector may be scanned along a spiral-shaped trajectory, radial trajectories or along high-low ordered lines.