Image quality of flat-panel cone beam CT

Georg Rose; Jens Wiegert; Dirk Schaefer; Klaus Fiedler; Norbert Conrads; Jan Timmer; Volker Rasche; Niels Noordhoek; Erhard Klotz; Reiner Koppe

doi:10.1117/12.479973

5 June 2003 Image quality of flat-panel cone beam CT

Georg Rose, Jens Wiegert, Dirk Schaefer, Klaus Fiedler, Norbert Conrads, Jan Timmer, Volker Rasche, Niels Noordhoek, Erhard Klotz, Reiner Koppe

Author Affiliations +

Proceedings Volume 5030, Medical Imaging 2003: Physics of Medical Imaging; (2003) https://doi.org/10.1117/12.479973
Event: Medical Imaging 2003, 2003, San Diego, California, United States

Abstract

We present results on 3D image quality in terms of spatial resolution (MTF) and low contrast detectability, obtained on a flat dynamic X-ray detector (FD) based cone-beam CT (CB-CT) setup. Experiments have been performed on a high precision bench-top system with rotating object table, fixed X-ray tube and 176 x 176 mm² active detector area (Trixell Pixium 4800). Several objects, including CT performance-, MTF- and pelvis phantoms, have been scanned under various conditions, including a high dose setup in order to explore the 3D performance limits. Under these optimal conditions, the system is capable of resolving less than 1% (~10 HU) contrast in a water background. Within a pelvis phantom, even inserts of muscle and fat equivalent are clearly distinguishable. This also holds for fast acquisitions of up to 40 fps. Focusing on the spatial resolution, we obtain an almost isotropic three-dimensional resolution of up to 30 lp/cm at 10% modulation.

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Georg Rose, Jens Wiegert, Dirk Schaefer, Klaus Fiedler, Norbert Conrads, Jan Timmer, Volker Rasche, Niels Noordhoek, Erhard Klotz, and Reiner Koppe "Image quality of flat-panel cone beam CT", Proc. SPIE 5030, Medical Imaging 2003: Physics of Medical Imaging, (5 June 2003); https://doi.org/10.1117/12.479973

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