Siemens Aktiengesellschaft

Axel Martinez-Möller

Stephan Nekolla

Ralf Ladebeck

Sibylle Ziegler

Gaspar Delso

A method is disclosed for recording and processing measurement data from a hybrid imaging device including a first partial device for a first imaging modality and a second partial device for emission tomography. In at least one embodiment, the method includes: performance of measurement data recording with the first partial device, wherein successive different table positions are approached during the measurement data recording; recording of emission tomography measurement data with the second partial device during the performance of the measurement data recording with the first partial device at the different table positions; assignment of the recorded emission tomography measurement data to the different table positions; changing of the emission tomography measurement data assigned to different table positions with respect to the data volume in such a way that the recording times corresponding to the changed data volumes are matched to each other at different table positions; and reconstruction of an emission tomography image from the changed emission tomography measurement data. At least one embodiment of the invention further relates to a hybrid imaging device designed to perform the method.

Method for recording and processing measurement data from a hybrid imaging device and hybrid imaging device

A method and an system are disclosed for reconstructing an emission tomography image in a combined MR (magnetic resonance) and emission tomography imaging system. In at least one embodiment, the method includes obtaining an MR image of a subject, the subject being clipped in the MR image; obtaining raw emission tomography scan data of the subject; determining a missing part of the subject clipped in the MR image; using information of the MR image and the determined missing part to obtain a final attenuation model of the subject; and reconstructing the emission tomography image using the raw data and the final attenuation model.

Reconstruction of an emission tomography image

A method and an apparatus are disclosed for determining the effective count rate of photons in a combined MR/emission tomography recording. In at least one embodiment, the method includes capturing MR signals with an MR apparatus in an MR/emission tomography device for producing an MR recording of an examination object with a number of tissue types, each having a specific MR parameter; associating a number of emission tomography attenuation coefficients with the number of tissue types as a function of the MR parameter by way of an association unit, so that one emission tomography attenuation coefficient corresponds in each instance to at least one of the tissue types in the examination object; capturing photons in the examination object with an emission tomography apparatus in the MR/emission tomography device for producing an emission tomography recording; and weighting the emission tomography recording with the emission tomography attenuation coefficients by way of a correction apparatus for determining the effective count rate in the number of tissue types and for producing a corrected emission tomography recording.

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Munich, Germany

Axel Martinez-Möller