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Abstract #4025

Whole-Body, Zero TE Based Pseudo CT Conversion

Florian Wiesinger1, Sangtae Ahn2, Sandeep Kaushik3, Cristina Cozzini1, Dirk Beque1, Lishui Cheng2, Jaewon Yang4, Andrew Leynes4, Dattesh Shanbhag3, Thomas A. Hope4, and Peder E. Z. Larson4

1GE Global Research, Munich, Germany, 2GE Global Research, Schenectady, NY, United States, 3GE Global Research, Bangalore, India, 4Radiology and Biomedical Imaging, UCSF, San Francisco, CA, United States

Proton density (PD) weighted Zero TE (ZTE) MR imaging has been demonstrated to provide accurate bone depiction, segmentation and pseudo CT conversion in the head. However, when applied for the whole-body, discriminating between air and bone appears challenging (primarily because of SNR and RF shading). Here we present a novel method for decomposition of low ZTE signal intensity regions into bone and air based on connected component and shape analysis. The method is demonstrated for whole-body, pseudo CT conversion in three PET/MR patients.

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