title: Measurement of temporal resolution in dual source CT.
abstract: This work assesses the temporal resolution of dual-source computed tomography (CT) in a visually intuitive manner. Exploiting the principles of ring artifact creation, a phantom containing a highly attenuating delta function signal (a wire) was rotated at the same speed as the gantry, creating a partial ring artifact where the angular extent of the artifact provides a direct indication of the temporal resolution. A demonstration of the effect of the evaluated 165 and 83 ms nominal temporal resolutions on motion artifacts in cardiac CT is provided using patient data.
authors.affiliation: Department of Radiology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA. mccollough.cynthia@mayo.edu
authors.forename: Cynthia H
authors.initials: CH
authors.lastname: McCollough
authors.forename: Bernhard
authors.initials: B
authors.lastname: Schmidt
authors.forename: Lifeng
authors.initials: L
authors.lastname: Yu
authors.forename: Andrew
authors.initials: A
authors.lastname: Primak
authors.forename: Stefan
authors.initials: S
authors.lastname: Ulzheimer
authors.forename: Herbert
authors.initials: H
authors.lastname: Bruder
authors.forename: Thomas G
authors.initials: TG
authors.lastname: Flohr
mesh_terms: D000465:Algorithms; D016477:Artifacts; D006801:Humans; D019047:Phantoms, Imaging; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods*