Patent application number | Description | Published |
20090039885 | METHOD AND APPARATUS FOR ACQUISITION OF MAGNETIC RESONANCE DATA - In a magnetic resonance method and apparatus for acquisition of measurement data from a subject, k-space to be scanned into an inner region and an outer region, and the inner region is divided into inner segments that differ in terms of their distance from a k-space center and the outer region is divided into outer segments that differ in terms of their distance from a k-space center. First k-space data are acquired for the inner region, wherein k-space lines of the inner region are divided into first groups such that k-space lines from different inner segments are associated in each of the first groups, and the first groups are successively scanned. Second k-space data are acquired for the outer region, wherein k-space lines of the outer region are divided into second groups such that k-space lines from different outer segments are associated in each of the second groups, and the second groups are successively scanned. | 02-12-2009 |
20110043204 | MAGNETIC RESONANCE SYSTEM AND METHOD FOR COMPUTERIZED RULE-BASED CONTROL THEREOF - In a magnetic resonance system according to a measurement protocol defined in advance and comprising multiple acquisition parameters, wherein given a non-compliance with at least one limit value (which is automatically established before the beginning of a subject-specific measurement data acquisition)—in particular a SAR limit value and/or a magneto-stimulation limit value and/or a hardware limit value—by the measurement protocol, an adaptation of at least one acquisition parameter ensues using at least one (in particular user-defined) protocol-specific rule for compliance with the limit value, and the measurement data acquisition ensues automatically according to the adapted acquisition parameters. | 02-24-2011 |
20110137598 | METHOD TO CONFIGURE AT LEAST A PARTIAL RANGE OF A PULSE SEQUENCE OF A MAGNETIC RESONANCE DEVICE - In a method to configure at least one partial range of a pulse sequence for operating a magnetic resonance device, the pulse sequence is composed of at least two different program units, and information and/or at least one parameter is exchanged between the individual program units by a computerized mediator unit. | 06-09-2011 |
20130088228 | METHOD AND APPARATUS FOR MAGNETIC RESONANCE IMAGING - In a method and apparatus for magnetic resonance (MR) imaging, a magnetization of nuclear spins in a subject is prepared in multiple preparation modules of an acquisition sequence. MR signals are acquired with at least one imaging module of the sequence. Spoiler gradient fields are generated in the multiple preparation modules in order to affect a transverse magnetization of the spins. The spoiler gradient fields that are applied in at least two different preparation modules are spatially varied along different directions. Spoiler gradient moments of the spoiler gradient fields are selected so that, for at least one of three orthogonal spatial directions, a weighted sum of the spoiler gradient moments that are applied along this spatial direction satisfies a threshold condition. | 04-11-2013 |
20130249550 | METHOD AND MAGNETIC RESONANCE SYSTEM TO ACQUIRE MR DATA IN A PREDETERMINED VOLUME SEGMENT OF AN EXAMINATION SUBJECT - In a method and a magnetic resonance (MR) system, a marked area is determined that demarcates a predetermined volume segment of the subject relative to the regions adjacent thereto. Nuclei in the predetermined volume segment are excited, or nuclei in a region adjacent thereto are saturated with an RF excitation pulse at the same time a magnetic field gradient is activated. The center frequency of a frequency range of the RF excitation pulse and the direction of the magnetic field gradient are adjusted dependent on resonant frequencies of substances present within the predetermined volume segment in order, starting from the predetermined volume segment to shift an actual excitation volume segment excited by the RF excitation pulse toward the marked area, or to shift a saturation volume saturated by the RF excitation pulse away from the marked area. MR data are then acquired from the predetermined volume segment. | 09-26-2013 |
20130249551 | METHOD AND APPARATUS TO DETERMINE A COMPLETE PARAMETER OF A MAGNETIC RESONANCE PULSE SEQUENCE - In a method to determine a complete parameter of a pulse sequence composed of multiple pulse sequence modules for operating a magnetic resonance examination apparatus parameter information of the pulse sequence modules is stored in a memory in leaves and nodes of a tree structure, and the parameter information stored in the tree structure is evaluated to determine the complete parameter of the pulse sequence. | 09-26-2013 |
20140084921 | MAGNETIC RESONANCE IMAGING METHOD AND APPARATUS - In a method and apparatus for automatic magnetic resonance imaging of a patient, an MR overall image is composed from several MR partial images. An MR overview image is received by a process that determines several scanning ranges based on the MR overview image. The MR scanning ranges are characterized by a length along a first direction. For all MR scanning ranges: the length along the first direction is set equal to the length of the longest MR scanning range in the first direction. | 03-27-2014 |
20150362573 | MAGNETIC RESONANCE APPARATUS AND OPERATING METHOD THEREFOR - In a magnetic resonance apparatus and an operating method therefore, a data acquisition sequence for operating the apparatus is repeatedly reviewed in a number of ascertainment passes executed in a processor, each ascertainment pass involving a calculation step, and in each calculation step a determination is made as to other respective values of data elements used in a previous calculation step have changed. If no change has occurred, a re-calculation in the current calculation step is not implemented, thereby reducing the time and computing capacity that are needed to generate a final data acquisition sequence. | 12-17-2015 |