Dual-focal-spot single-detector CT: A simulation study to assess cone-beam artifacts and noise.

ABSTRACT:

Background

Ultra-wide coverage CT (> 128 detector rows) makes it possible to image a heart or brain in a single rotation but are associated with large cone angles, which can severely degrade the image quality.

Purpose

This study evaluate the image quality and artifact levels of a dual-focal-spot single-detector (DFSSD) CT geometry designed to achieve 140 mm z-axis coverage, through a simulation study.

Methods

The DFSSD CT system employs two x-ray focal spots spaced 90 mm apart along the z-axis and a 100 mm CT detector. It provides 140 mm z-axis coverage at the iso-center. A research CT simulation package (CatSim) was employed throughout this study. To compare the image quality, three system geometries were simulated: (A) single focal spot with 40 mm detector (VCT40),

SUBMITTER: Li B 

PROVIDER: S-EPMC12401943 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature