Abstract: In a method for ascertaining correction information for correcting a magnetic resonance imaging scan, respective first and second magnetic resonance data for at least one gradient direction are acquired, where the first magnetic resonance data is acquired while the magnetic field gradient is applied in the respective gradient direction, and the second magnetic resonance data is acquired while the magnetic field gradient is applied counter to the respective gradient direction. The method may further include determining a respective phase difference for reference points along a respective position space line in the position space that extends in the respective gradient direction based on the first and second magnetic resonance data, and providing the phase differences of at least one subgroup of the reference points as correction information or ascertaining the provided correction information based on the phase differences of at least the subgroup of the reference points.

Abstract: A computer-implemented method for gradient delay time correction of MR data using an MR device, wherein the magnetic resonance data is recorded using a three-dimensional recording technique with linear recording trajectories which are oriented in different readout directions of a readout plane that is perpendicular to a partition direction. The method includes: in a calibration measurement using the magnetic resonance device, recording calibration data which describes readout-direction-dependent shifts, caused by delay effects, of measurement points in the k-space; determining correction data by evaluating the calibration data; correcting the MR data based on the correction data in order to compensate for the delay effects, wherein the calibration data, which covers a coverage region in partition direction is recorded in a resolved manner, and the correction data is determined and applied in a manner that is dependent on partition direction.

Abstract: The disclosure relates to gradient delay time correction of magnetic resonance data. For recording the magnetic resonance data, use is made of a three-dimensional recording technique with linear recording trajectories oriented in different readout directions of a readout plane that is perpendicular to a partition direction. Calibration data is recorded which covers a plurality of partitions in partition direction and which describes readout-direction-dependent shifts, caused by delay effects, of measurement points, e.g. sampled k-space sections in the k-space. Correction data is determined by evaluating the calibration data, and the magnetic resonance data is corrected on the basis of the correction data in order to compensate for the delay effects. The calibration data, which covers a coverage region in partition direction, is recorded in a resolved manner in partition direction, and at least one acceleration technique is applied in the partition direction during the recording of the calibration data.

Abstract: A method for preparing magnetic resonance imaging of an object under examination is described. A plurality of representative pulse sequence segments are generated, each of which is associated with a reference gradient amplitude of the gradient pulse having the highest stimulation potential of the representative pulse sequence segment, and the stimulation potential of which is representative of a group of partially different pulse sequences. For each of the representative pulse sequence segments, a maximum gradient slew rate is determined for which a permitted maximum value of the stimulation potential is not exceeded. One of the representative pulse sequence segments is determined and selected, for a measurement protocol to be planned for a magnetic resonance imaging to be performed, according to the gradient amplitude of the gradient pulse having the highest stimulation potential of a pulse sequence segment of the pulse sequence on which the measurement protocol is based.

Abstract: Method for separating measurement data of an examination object, which data was acquired in collapsed form simultaneously for slices using an EPI SMS technique, into measurement data of individual slices, first and second sets of reference measurement data for separating the measurement data are acquired for each of the slices using a GRE acquisition technique, wherein the reference measurement data in the first set is acquired during switching of readout gradients of a first polarity, and the reference measurement data in the second set is acquired during switching of readout gradients of a second polarity. Based on the two sets of reference measurement data, corresponding separate first calibration data is determined from the reference measurement data acquired using a GRE acquisition technique while switching readout gradients of a first polarity, and second calibration data is determined from the reference measurement data acquired while switching readout gradients of a second polarity.

Abstract: Techniques are described for complex preprocessing steps to ensure consistency of sorted sets of reference measurement data, which have conventionally been required when sorting reference measurement data sets for DPG algorithms captured using an EPI technique, to be omitted because items of reference measurement data captured via the described techniques are already consistent in themselves. Therefore, for each polarity of the read-out gradients, a set of fully sampled reference measurement data is available, which is already suitable for carrying out a dual-polarity (DP) algorithm without any further measures.

Abstract: A method for preparing magnetic resonance imaging of an object under examination is described. A plurality of representative pulse sequence segments are generated, each of which is associated with a reference gradient amplitude of the gradient pulse having the highest stimulation potential of the representative pulse sequence segment, and the stimulation potential of which is representative of a group of partially different pulse sequences. For each of the representative pulse sequence segments, a maximum gradient slew rate is determined for which a permitted maximum value of the stimulation potential is not exceeded. One of the representative pulse sequence segments is determined and selected, for a measurement protocol to be planned for a magnetic resonance imaging to be performed, according to the gradient amplitude of the gradient pulse having the highest stimulation potential of a pulse sequence segment of the pulse sequence on which the measurement protocol is based.

Abstract: A computer-implemented method for ascertaining flip angles of a magnetic resonance sequence with variable flip angles, a magnetic resonance apparatus, and a computer program product are disclosed. In this case, the magnetic resonance sequence includes at least one echo train with an excitation pulse and a plurality of refocusing pulses. In each case, an adapted flip angle is ascertained for at least one part of the plurality of refocusing pulses.

Abstract: A method for parameterizing a gradient performance of a magnetic resonance imaging system using an electronic computing facility of the magnetic resonance imaging system includes specifying a first limit value for the gradient performance in dependence on potential nerve stimulation of a patient, and specifying a second limit value for the gradient performance in dependence on potential cardiac muscle stimulation of the patient. The method also includes parameterizing a maximum gradient amplitude of a pulse of the gradient performance and a slew rate of the pulse in dependence on the first limit value and the second limit value.

Abstract: A method for determining a parameter setting for a gradient power of a magnetic resonance system by an electronic computing device. The method includes specifying a limit value for a nerve stimulation in the case of a person positioned in the magnetic resonance system, entering at least one gradient parameter for a pulse of the gradient power as the parameter setting by an input device of the electronic computing device, approximating a potential nerve stimulation as a function of the at least one gradient parameter by a predefined mathematical model of the electronic computing device, comparing the approximated potential nerve stimulation with the predefined limit value by the electronic computing device, and determining the parameter setting as a function of the comparison.

Abstract: Improved techniques and systems for storage, delivery and acquisition of digital assets stored in cloud data storage. Cloud data storage can be provided by a cloud data repository that is capable of storing digital data for various users. A given user can access cloud data storage from any of his/her authorized client devices via a network. A given client device can access not only locally stored digital assets but also remotely stored digital assets from cloud data storage. In one embodiment, downloads of digital assets resident in cloud data storage to client devices can be managed in view of available network performance. As one example, digital assets of differing quality levels can be downloaded in a manner dependent on network performance. As another example, locally stored digital assets of reduced quality can be upgraded (e.g., replaced) by higher quality versions in a manner dependent on network performance.

Abstract: Improved techniques and systems for storage, delivery and acquisition of digital assets stored in cloud data storage. Cloud data storage can be provided by a cloud data repository that is capable of storing digital data for various users. A given user can access cloud data storage from any of his/her authorized client devices via a network. A given client device can access not only locally stored digital assets but also remotely stored digital assets from cloud data storage. In one embodiment, downloads of digital assets resident in cloud data storage to client devices can be managed in view of available network performance. As one example, digital assets of differing quality levels can be downloaded in a manner dependent on network performance. As another example, locally stored digital assets of reduced quality can be upgraded (e.g., replaced) by higher quality versions in a manner dependent on network performance.

Abstract: Systems and methods here include computer-implemented methods for determining ratings for software including displaying multiple content descriptors and options for user selection of both the frequency and intensity of the content in the software program by non-numerical selections. Some embodiments include receiving selections of user characterizations of frequency and intensity for each of the multiple content descriptors, and mapping the user characterization selections of each of the multiple content descriptors to find a rating level for each of the multiple content descriptors. Some embodiments include determining a highest rating level for the software program by comparing all of the rating levels of all of the multiple content descriptors, and distributing the software program to certain geographies based on the determined highest rating level for the software program.

Abstract: Techniques for storing information representing a venue are described. A venue data provider may upload venue data to a venue data service. The venue data can include locations, geometries, and business categories of the buildings and floors. The venue data service can validate the venue data, and request a survey service to survey the venue using the validated venue data. A survey can include recording measurements of an environment variable at various locations of the venue. The location service can generate location fingerprint data from the survey. The location fingerprint data can include expected measurements of the environment variable at various locations of the building. The venue data service can provide the location fingerprint data to a mobile device such that the mobile device can determine a location of the mobile device in the venue using sensor readings of the environment variable.

Abstract: Improved techniques and systems for storage, delivery and acquisition of digital assets stored in cloud data storage. Cloud data storage can be provided by a cloud data repository that is capable of storing digital data for various users. A given user can access cloud data storage from any of his/her authorized client devices via a network. A given client device can access not only locally stored digital assets but also remotely stored digital assets from cloud data storage. In one embodiment, downloads of digital assets resident in cloud data storage to client devices can be managed in view of available network performance. As one example, digital assets of differing quality levels can be downloaded in a manner dependent on network performance. As another example, locally stored digital assets of reduced quality can be upgraded (e.g., replaced) by higher quality versions in a manner dependent on network performance.

Abstract: Techniques for storing information representing a venue are described. A venue data provider may upload venue data to a venue data service. The venue data can include locations, geometries, and business categories of the buildings and floors. The venue data service can validate the venue data, and request a survey service to survey the venue using the validated venue data. A survey can include recording measurements of an environment variable at various locations of the venue. The location service can generate location fingerprint data from the survey. The location fingerprint data can include expected measurements of the environment variable at various locations of the building. The venue data service can provide the location fingerprint data to a mobile device such that the mobile device can determine a location of the mobile device in the venue using sensor readings of the environment variable.

Abstract: Techniques for storing information representing a venue are described. A venue data provider may upload venue data to a venue data service. The venue data can include locations, geometries, and business categories of the buildings and floors. The venue data service can validate the venue data, and request a survey service to survey the venue using the validated venue data. A survey can include recording measurements of an environment variable at various locations of the venue. The location service can generate location fingerprint data from the survey. The location fingerprint data can include expected measurements of the environment variable at various locations of the building. The venue data service can provide the location fingerprint data to a mobile device such that the mobile device can determine a location of the mobile device in the venue using sensor readings of the environment variable.

Abstract: Improved techniques and systems for storage, delivery and acquisition of digital assets stored in cloud data storage. Cloud data storage can be provided by a cloud data repository that is capable of storing digital data for various users. A given user can access cloud data storage from any of his/her authorized client devices via a network. A given client device can access not only locally stored digital assets but also remotely stored digital assets from cloud data storage. In one embodiment, downloads of digital assets resident in cloud data storage to client devices can be managed in view of available network performance. As one example, digital assets of differing quality levels can be downloaded in a manner dependent on network performance. As another example, locally stored digital assets of reduced quality can be upgraded (e.g., replaced) by higher quality versions in a manner dependent on network performance.

Abstract: Methods, systems, and computer program products for polygonal routing are described. A computer system can provide turn-by-turn navigation in a venue for a mobile device using a navigation graph. The navigation graph can include nodes representing a series of navigation areas leading from a start point to an end point in a venue including indoor space. Each navigation area can be a polygon occupying a non-zero geographic area. The computer system updates the turn-by-turn instructions when the mobile device enters or exits a navigation area in the series of navigation areas, until the device reaches the end point.

Abstract: Systems and methods for transporting media content data over a network to a media submission system are disclosed. A client media submission program may be provided that supports media submission to the media submission system using a plurality of transport mechanisms. One of the transport mechanisms to be utilized for the media submission may be determined based at least in part on configuration criteria. The media content data may be submitted over the network to the media submission system using the determined one of the transport mechanisms.