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An inverse-geometry volumetric CT system with a large-area scanned source: a feasibility study
Taly Gilat Schmidt1, Rebecca Fahrig, Norbert J Pelc
1Department of Radiology, Stanford University, Stanford, California 94305, USA.
Abstract:
We propose an inverse-geometry volumetric CT system for acquiring a 15-cm volume in one rotation with negligible cone-beam artifacts. The system uses a large-area scanned source and a smaller detector array. This note describes two feasibility investigations. The first examines data sufficiency in the transverse planes. The second predicts the signal-to-noise ratio (SNR) compared to a conventional scanner. Results showed sufficient sampling of the full volume in less than 0.5 s and, when compared to a conventional scanner operating at 24 kW with a 0.5-s voxel illumination time (e.g., 0.5-s gantry rotation and pitch of one), predicted a relative SNR of 76%.