Measurement of temporal resolution in dual source CT.
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.
McCollough
Cynthia H
CH
Department of Radiology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA. mccollough.cynthia@mayo.edu
Schmidt
Bernhard
B
Yu
Lifeng
L
Primak
Andrew
A
Ulzheimer
Stefan
S
Bruder
Herbert
H
Flohr
Thomas G
TG
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*