Abstract: 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.

Abstract: 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.

Abstract: A device for 3D acquisition, 3D visualization and computer guided surgery with a tracking system, which can be for example an external optical tracking system (4), a tracked nuclear probe (1) having a nuclear probe (11) and a tip of nuclear probe (14), which measures a radioactivity, is achieved by providing a time synchronized recording of the spatial position and orientation of the tip of nuclear probes (14) and its measured counts of radioactivity. Thus a 3D radioactive surface distribution (8) is generated and may be visualized spatially registered with the viewing geometry of any in a superimposed image (81). Moreover using the said device, a method for 3D acquisition, 3D visualization and computer guided surgery is introduced for invasive or minimally invasive interventions.