Abstract #4581

UTILE A Fast Combined UTE-DIXON Four Class Attenuation Correction Technique for PET/MR

Jochen Franke^1,2, Hank Donker³, Felix Mottaghy⁴, Christiane Kuhl³, Fabian Kiessling², Volkmar Schulz^1,2

¹Molecular Imaging Systems, Philips Research Europe, Aachen, North Rhine-Westphalia, Germany; ²Experimental Molecular Imaging, University of Aachen (RWTH), Aachen, North Rhine-Westphalia, Germany; ³Diagnostic & Interventional Radiology, University Hospital Aachen, Aachen, North Rhine-Westphalia, Germany; ⁴Nuclear Medicine, University Hospital Aachen, Aachen, North Rhine-Westphalia, Germany

The focus of this work is on the emerging methodology of magnetic resonance (MR)-based attenuation correction (MRAC) of positron emission tomography (PET) raw data. We propose a new MR sequence, comprising the functionality of ultrashort echotime (UTE) and the Dixon technique within a single examination. This UTE triple-echo (UTILE) sequence paired with a dedicated post-processing is capable to derive a truly MR-based attenuation map (-map) accounting for four compartments: soft tissue, adipose tissue, cortical bone and air.