Abstract #4650
Accurate PET Reconstruction for PET/MR Scanners using Synthetic CT
Snehashis Roy 1 , Wen-Tung Wang 1 , John Anthony Butman 2 , and Dzung Pham 1
1
Center for Neuroscience and Regenerative
Medicine, Henry Jackson Foundation, Bethesda, MD, United
States,
2
Diagnostic
Radiology, National Institute of Health, Bethesda, MD,
United States
In functional imaging, PET/CT images are regularly
acquired in clinical setting. CT-based electron density
attenuation coefficient maps enable correct
reconstruction of PET images. Recently, the use of
Magnetic Resonance Imaging (MRI) has been popularized in
PET/MR systems. We demonstrate that Ultra-short echo
time (UTE) dual-echo images can effectively be used to
synthesize realistic looking CT via patch matching from
subject to atlas. We show that PET reconstruction using
synthetic CT based μ-maps are very close to that
obtained with original CT based μ-maps and synthetic CT
provides better PET reconstruction than DIXON based
μ-map.
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