Back to the list
Congress: ECR25
Poster Number: C-21700
Type: Poster: EPOS Radiologist (scientific)
Authorblock: A. Choux1, Z. Yin2, C. L. Kim2, A. Pourmorteza1; 1Atlanta, GA, GA/US, 2Niskayuna, NY/US
Disclosures:
Arnaud Choux: Research/Grant Support: GE HealthCare
Zhye Yin: Employee: GE HealthCare
Chang Lyong Kim: Employee: GE HealthCare
Amir Pourmorteza: Grant Recipient: GE HealthCare
Keywords: Computer applications, CT, CT-Angiography, CT-Quantitative, Physics, Cancer
Purpose

Photon-counting detectors (PCDs) provide multi-contrast agent (CA) separation through K-edge imaging [1].

Fig 1: K-Edge imaging principle: Materials such as Gd and Au have abrupt changes in their mass-attenuation curve called a K-Edge which can be used in spectral CT to distinguish them from background tissue.
Timely administration of two contrast agents can create synchronized anatomical maps in various perfusion phases, eliminating the need for multi-phase scans. This approach improves efficiency and reduces patient radiation exposure. Deep-Si PCDs, featuring eight adjustable thresholds, offer greater flexibility in capturing the K-edge of multiple CAs compared to current clinical PCD-CTs, which are limited to a maximum of four energy settings and are based on high-Z Cd(Zn)Te. This enhanced capability enables better differentiation of contrast agents for more precise imaging. We examined the effect of energy threshold settings on multi-contrast separability to optimize performance.
GALLERY