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Fontius
Joerg Ulrich Fontius, Neunkirchen A. Brand DE
| Patent application number | Description | Published |
|---|---|---|
| 20080231270 | METHOD FOR ADJUSTMENT OF A B1 FIELD OF A MAGNETIC RESONANCE APPARATUS - In a method for adjustment of a B1 field in a magnetic resonance apparatus, the position of the measurement subject relative to a coordinate system is determined from a plurality of measurement subjects with a morphological magnetic resonance measurement. Three-dimensionally associable measurement subject data are determined from the measurement subject. Respective tissue types of the measurement subject are determined using the three-dimensional measurement subject data and a segmentation of the measurement subject into regions is effected using the tissue types. Known dielectric properties are respectively associated with the tissue types. The segmentation and the association for all positions of the measurement subject are recorded in respective entries of a database, such that the database contains all entries of the measurement subjects. A radio-frequency simulation for an transmission coils is implemented with the entries of the database, with which electrical field distributions and/or B1 field distributions related to spatial elements are determined as a simulation result and are entered as results into the database. For further magnetic resonance examinations, the entries of the database are used for determination of an optimized current distribution for elements of a transmission coil with which the B1 field is ultimately adjusted. | 09-25-2008 |
| 20080231274 | METHOD TO CONTROL A MAGNETIC RESONANCE SYSTEM - In a method for controlling a magnetic resonance system having a radio-frequency antenna structure and a number of individually controllable transmission channels, respective parallel radio-frequency signals are emitted via the transmission channels for generation of a desired radio-frequency field distribution in at least one specific volume region within an examination volume of the magnetic resonance system. A digital signal is generated for each of the transmission channels and is modulated on a carrier frequency. The radio-frequency signal so generated is transmitted via a radio-frequency signal path to the radio-frequency antenna structure and is amplified therein in a radio-frequency power amplifier. The digital signal is manipulated in a characteristic curve correction device on the basis of a correction characteristic curve predetermined for the respective radio-frequency signal path such that a distortion of the radio-frequency signal caused in the appertaining radio-frequency signal path is at least partially compensated. Respective individual correction characteristic curves for a specific measurement are predetermined for the various transmission channels dependent on a field distribution parameter that defines the desired radio-frequency field distribution. A magnetic resonance system implements such a method. | 09-25-2008 |
| 20100079142 | COMBINED MAGNETIC RESONANCE IMAGING AND TARGETING DEVICE FOR MAGNETIC PARTICLES - The invention relates to a combined magnetic resonance imaging and targeting device for magnetic particles having a magnetic coil array. The magnetic coil array comprises a plurality of coils, each of which is connected to a power supply. The power supplies are connected to a controller which is embodied for two operating modes. In a first operating mode the power supplies are controlled in such a way that a magnetic field extreme value is generated at at least one location in a target region. In a second operating mode the power supplies are controlled in such a way that magnetic fields having a strictly monotonously rising or falling magnetic field profile are generated in an imaging region. | 04-01-2010 |
Jörg Ulrich Fontius, Neunkirchen A. Brand DE
| Patent application number | Description | Published |
|---|---|---|
| 20090192384 | Medical unit and method for improving examination and treatment workflows - The invention relates to a medical unit comprises a 3D radar array for the detection of positional or movement data of objects in an examination space and a processing unit for the evaluation of the detected data, with the processing unit being connected to the medical unit and to the 3D radar array, and with the evaluated data being used to control the medical unit or for post-processing data acquired by the medical diagnostic or therapeutic unit. The invention also relates to a method for improving examination or treatment workflows with the medical unit, comprising: detecting positional or movement data of objects in the examination space by the 3D radar array; generating control commands for the medical unit based on the detected data; and post-processing image or spectroscopy data received by the medical based on the detected data. The medical unit is a medical diagnostic or therapeutic unit. | 07-30-2009 |
| 20100080428 | Method for evaluating at least one image data record - A method is disclosed for evaluating at least one image data record, in particular a magnetic resonance image data record, of a region of a patient including at least one joint. In at least one embodiment of the method, at least one image data record of the region is first of all recorded, the image data record is segmented with respect to at least one mechanically relevant component of the joint in order to determine segmentation information, a patient movement model is generated on the basis of the segmentation information and/or the patient movement model is selected from a database of movement models, and joint information relating to the motions of the joint is determined from the patient movement model. | 04-01-2010 |
Jörg Ulrich Fontius, Neunkirchen A. Brand DE
| Patent application number | Description | Published |
|---|---|---|
| 20100080428 | Method for evaluating at least one image data record - A method is disclosed for evaluating at least one image data record, in particular a magnetic resonance image data record, of a region of a patient including at least one joint. In at least one embodiment of the method, at least one image data record of the region is first of all recorded, the image data record is segmented with respect to at least one mechanically relevant component of the joint in order to determine segmentation information, a patient movement model is generated on the basis of the segmentation information and/or the patient movement model is selected from a database of movement models, and joint information relating to the motions of the joint is determined from the patient movement model. | 04-01-2010 |