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Proceedings Paper

Image quality of flat-panel cone beam CT
Author(s): Georg Rose; Jens Wiegert; Dirk Schaefer; Klaus Fiedler; Norbert Conrads; Jan Timmer; Volker Rasche; Niels Noordhoek; Erhard Klotz; Reiner Koppe
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Paper 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.

Paper Details

Date Published: 5 June 2003
PDF: 7 pages
Proc. SPIE 5030, Medical Imaging 2003: Physics of Medical Imaging, (5 June 2003); doi: 10.1117/12.479973
Show Author Affiliations
Georg Rose, Philips Research Labs. (Germany)
Jens Wiegert, Medical Univ. of Luebeck (Germany)
Dirk Schaefer, Philips Research Labs. (Germany)
Klaus Fiedler, Philips Research Labs. (Germany)
Norbert Conrads, Philips Research Labs. (Germany)
Jan Timmer, Philips Medical Systems (Netherlands)
Volker Rasche, Philips Research Labs. (Germany)
Niels Noordhoek, Philips Medical Systems (Netherlands)
Erhard Klotz, Philips Research Labs. (Germany)
Reiner Koppe, Philips Research Labs. (Germany)

Published in SPIE Proceedings Vol. 5030:
Medical Imaging 2003: Physics of Medical Imaging
Martin J. Yaffe; Larry E. Antonuk, Editor(s)

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