Bruker Biospin Mri Gmbh

Technische Universitat Braunschweig

Sven Junge

Arne Berneking

Frank Seifert

Thimo Hugger

Herbert Rinneberg

A hybrid imaging apparatus includes a magnetic resonance imaging (MM) arrangement having an RF resonator structure () and a gradient coil system () having a longitudinal axis, an emission tomography (ET) arrangement with a detector device having at least one photosensor () and one circuit board arrangement with at least one readout circuit board () on which an ET electronics is arranged, and an internal shielding device () shielding the readout electronics () of the ET arrangement and shielding the RF resonator structure of the MRI arrangement. The photosensor is arranged, in relation to the longitudinal axis, radially inside the sensor circuit boards and radially outside the RF resonator structure. The internal shielding device is arranged radially outside the photosensor and/or integrated into the photosensor. This achieves both a compact design and optimized performance of the detection of the MR and ET imaging.

Hybrid imaging apparatus

A method to generate an attenuation correction map to compensate imaging errors in emission tomography resulting from the presence of hardware parts inside the imaging volume of an emission tomograph. Components of 3-dimensional CAD models of the hardware parts to be compensated are converted into voxels on a predetermined grid and assigned a filling factor per voxel. Image data sets of each component are multiplied with respective attenuation coefficients and thereafter superimposed to form an attenuation correction map. Thereby, in a simple and automatable way a profoundly exact, mostly noise-free and exactly reproducible attenuation correction map for attenuation correction in an emission tomography device may be generated.

Attenuation correction in emission tomography taking into account the hardware parts that are actually present

The invention concerns an apparatus for generating and/or detecting radio frequency (RF)-B1 fields in an investigational volume () of a magnetic resonance (MR) device, wherein the apparatus comprises a tubular surface coil () which is formed from a conducting strip and is capacitively closed at least two neighboring ends, wherein the ratio between length L and width W of the strip is &#x2266;30, and wherein the volume under investigation () is disposed outside of the space surrounded by the strip, bordering an outer surface () of the surface coil () such that the B1 field lines, generated by the surface coil () in the volume under investigation () extend substantially parallel to this outer surface () thereby producing an NMR transmitting and receiving apparatus with improved properties, in particular, one permitting precise influence of the distribution of the RF-B1 field.

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Ettlingen, Germany

Sven Junge