In a method and magnetic resonance (MR) apparatus for performing an adjustment of the MR system, an examination object under is divided into at least one excitation volume. First adjustment parameters for the at least one excitation volume of the object, and second adjustment parameters for the at least one excitation volume of the object, which differ from the first adjustment parameters are determined. First MR signals are acquired from the at least one excitation volume using the first adjustment parameters. Second MR signals are acquired from an excitation volume using the second adjustment parameters. A first MR image of the at least one excitation volume is reconstructed using the first MR signal. A second MR image of the at least one excitation volume is reconstructed using the second MR signal.

A method for transmitting uplink information by a user equipment in a wireless communication system, the user equipment, a method for receiving uplink information by a base station in a wireless communication system, and the base station are provided. The method for transmitting uplink information by a user equipment in a wireless communication system includes mapping a reference signal on a first symbol in a slot; mapping acknowledgement information in response to reception of downlink data on a second symbol placed directly after the first symbol in the slot; and transmitting a signal including mapped data of the reference signal and the acknowledgement information in the slot.

A magnetic resonance imaging (MRI) techniques uses a T2-preparation outer volume suppression (OVS) pulse sequence to reduce the longitudinal magnetization outside a region of interest. A region is excited that includes the region of interest, radiofrequency (RF) signals are detected, and MRI images generated from the RF detected signals. The T2-preparation OVS pulse sequence includes, sequentially: a first tip-down excitation pulse, a first refocusing excitation pulse, a first tip-up excitation pulse that is selective spatially and/or spectrally, a second tip-down excitation pulse that is 180 out of phase with respect to the first tip-down excitation pulse, a second refocusing excitation pulse, and a second tip-up excitation pulse that is selective spatially and/or spectrally. Alternatively, the first tip-down excitation pulse is selective spatially and/or spectrally instead of the first tip-up excitation pulse, and the second tip-down excitation pulse is selective spatially and/or spectrally instead of the second tip-up excitation pulse.

A method of magnetic resonance imaging (100, 200) includes acquiring (300) tagged magnetic resonance data (144) by controlling the magnetic resonance imaging system with tagging pulse sequence commands (140). The tagging pulse sequence commands include a tagging inversion pulse portion (404) for spin labeling a tagging location (122, 122) within a subject (118). The tagging pulse sequence commands comprise a phase-contrast readout portion (406) which phase-contrast encodes in at least one direction. The control pulse sequence commands include a control inversion pulse portion (500) and the phase-contrast readout portion. A tagged magnitude image (148) is reconstructed (304) using the tagged magnetic resonance data. A control magnitude image (150) is reconstructed (306) using the control magnetic resonance data. An arterial image (152) is reconstructed (308) by subtracting the control magnitude image and the tagged magnitude image. At least one phase image (156, 158, 160) is reconstructed (312) using either the tagged magnetic resonance data and/or the control magnetic resonance data.

A pH-weighted chemical exchange saturation transfer (CEST) magnetic resonance imaging (MRI) method and system are provided that works by indirectly measuring the NMR signal from amine protons found on the backbones of amino acids and other metabolites, which resonate at a frequency of +2.8-3.2 ppm with respect to bulk water protons. The technique uses a modified magnetization transfer radiofrequency saturation pulse for the generation of image contrast. A train of three 100 ms Gaussian pulses at high amplitude (6 uT) or Sinc3 pulses are played at a particular frequency off-resonance from bulk water prior to a fast echo planar imaging (EPI) readout, with one full image acquired at each offset frequency. This non-invasive pH-weighted MRI technique does not require exogenous contrast agents and can be used in preclinical investigations and clinical monitoring in patients with malignant glioma, stroke, and other ailments.

A method is provided that includes applying at least one radiofrequency saturation pulse at a frequency or a range of frequencies to substantially saturate magnetization corresponding to an exchangeable proton in the ROI to generate magnetic resonance (MR) data. The MR data is then acquired using an echo-planar imaging readout, which is configured to sample a series of gradient echo pulse trains at a series of gradient echo times and a series of spin echo pulse trains at a series of spin echo times. One or more relaxometry measurement is then computed using the MR data sampled at the gradient echo times and the spin echo times. An oxygen-weighted image is then generated using the one or more relaxometry measurement, and a pH-weighted image is generated using MR data sampled at one or more of the spin echo times or gradient echo times.

Method of determining a velocity profile of a fluid flowing through a conduit, the method including applying a saturation pulse on spins of magnetic field-sensitive nuclei in the fluid, measuring a signal of the fluid to determine position of the magnetic field-sensitive nuclei, the measurement carried out at a recovery time TR and at a distance d within the conduit, determining within the conduit a radial distance r characterized by a local minimum in the measured signal, wherein the radial distance r is measured from the center of the conduit, and determining a velocity profile of the fluid at the radial distance, based on the magnetic field-sensitive nuclei.

A method for recording a magnetic resonance data set relating to a region that is moved at least partly and periodically includes prompting a trigger signal. The method also includes emitting a saturation pulse to at least partially saturate magnetization of an examination region as a function of the trigger signal.

In a method and magnetic resonance (MR) apparatus for monitoring an interventional procedure with an intervention tool in a vessel of an examination subject, the intervention tool is moved in an insertion direction in the vessel and the position of a front end of the intervention tool in the insertion direction is determined. A first volume segment is determined dependent on the position and the flow direction of a fluid within the vessel. An RF saturation pulse is radiated into the first volume segment that saturates nuclear spins in the fluid within the first volume segment. MR data are acquired in a second volume segment, which contains the front end of the intervention tool and a region in front of the intervention tool in the insertion direction. An MR image is generated from the acquired MR data.

For reduction of artifacts when acquiring magnetic resonance (MR) data using an MR apparatus, a SPAR pulse, which acts on spins in a first predetermined frequency range, and a saturation pulse, which acts on spins in a second predetermined frequency range, are radiated. A gradient for spatial encoding is activated at the same time as the saturation pulse, so that the saturation pulse acts on an edge region adjacent to the volume segment. The edge region borders an ellipsoidal useful volume of the scanner of the MR apparatus, in which the strength of the B0 field changes in terms of magnitude by no more than 30 ppm. Spoiler gradients are activated to destroy a transverse magnetization, before an RF excitation pulse, adjusted to the SPAIR pulse, is radiated. MR data are acquired after the SPAIR pulse, the saturation pulse and the RF excitation pulse. The second frequency range is adjusted to the first frequency range.