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Measurement of temporal resolution in dual source CT

2008; Wiley; Volume: 35; Issue: 2 Linguagem: Inglês

10.1118/1.2826559

2473-4209

Cynthia H. McCollough, Bernhard Schmidt, Lifeng Yu, Andrew N. Primak, Stefan Ulzheimer, Herbert Bruder, Thomas Flohr,

Medical Imaging Techniques and Applications

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 nominal temporal resolutions on motion artifacts in cardiac CT is provided using patient data.