Image-Based 2D Re-Projection for Attenuation Substitution in PET Neuroimaging.

ABSTRACT:

Purpose

In dual modality positron emission tomography (PET)/magnetic resonance imaging (MRI), attenuation correction (AC) methods are continually improving. Although a new AC can sometimes be generated from existing MR data, its application requires a new reconstruction. We evaluate an approximate 2D projection method that allows offline image-based reprocessing.

Procedure

2-Deoxy-2-[¹⁸F]fluoro-D-glucose ([¹⁸F]FDG) brain scans were acquired (Siemens HR+) for six subjects. Attenuation data were obtained using the scanner's transmission source (SAC). Additional scanning was performed on a Siemens mMR including production of a Dixon-based MR AC (MRAC). The MRAC was imported to the HR+ and the PET data were reconstructed twice: once using native SAC (ground

SUBMITTER: Laymon CM 

PROVIDER: S-EPMC6354927 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature