Andrew Peter Aitken1, Christoph Kolbitsch1, Tobias Schaeffter1, Claudia Prieto1
1Division of Imaging Sciences and Biomedical Engineering, King's College London, London, United Kingdom
Attenuation correction (AC) maps that accurately depict bone are required for precise PET reconstruction. Segmented AC maps can be obtained from ultrashort echo time (UTE) MR imaging. However, the clinical use of high resolution UTE in simultaneous PET/MR is limited by the long scan time (>7 minutes for the head). We show, in prospectively undersampled acquisitions, that compressed sensing combined with parallel imaging can be used to reduce the scan time to less than one minute, while retaining accurate AC-maps with respect to those produced from fully sampled data.