Abstract #1779

Attenuation Correction in PET/MRI Pediatric Treated Brain Tumors: a Preliminary Comparison between the ZTE and Atlas Techniques

Paola Scifo¹, Federico Fallanca¹, Maurizio Barbera², Annarita Savi¹, Valentino Bettinardi¹, Ilaria Neri¹, Giovanna Gattuso³, Maura Massimino³, Paolo Verderio⁴, Sara Pizzamiglio⁴, Andrea Falini^2,5, Luigi Gianolli¹, Filippo Spreafico³, Maria Picchio^1,5, and Cristina Baldoli^2,5

¹Nuclear Medicine, IRCCS San Raffaele Scientific Institute, Milan, Italy, ²Neuroradiology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy, ³Department of Medical Oncology and Hematology, Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy, ⁴Unit of Bioinformatics and Biostatistics, Department of Applied Research and Technological Development, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy, ⁵Vita-Salute San Raffaele University, Milan, Italy

Synopsis

A preliminary comparison between the two Atlas and ZTE attenuation correction methodologies in a group of pediatric patients with brain tumors is presented. The differences of the two ACmaps and PET images were calculated and the PET parameters were compared. Our results show that using ZTE or Atlas to generate ACmaps modifies the SUVs, but the differences in values are very small. Moreover, when metallic artefacts occur, both ZTE and Atlas show loss of signals but ACmaps_Atlas has smaller artefacts.

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