Feasibility of PET-enabled dual-energy CT imaging: First physical phantom and initial patient study results.

ABSTRACT:

Purpose

Dual-energy (DE) CT enables material decomposition by using two different x-ray energies and may be combined with PET for improved multimodality imaging. However, this increases radiation dose and may require a hardware upgrade due to the added second x-ray CT scan. The recently proposed PET-enabled DECT method allows dual-energy imaging using a conventional PET/CT scanner without the need to change scanner hardware or increase radiation exposure. Here we demonstrate the first-time physical phantom and patient data evaluation of this method.

Methods

The PET-enabled DECT method reconstructs a gamma-ray CT (gCT) image at 511 keV from the time-of-flight PET data with the maximum-likelihood attenuation and activity (MLAA) approach and then combines this image with the lo

SUBMITTER: Zhu Y 

PROVIDER: S-EPMC11928277 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature