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In industrial CT,it is often required to inspect large objects using short line-detectors. To acquire the complete CT data for the scan-ning slice of large objects using short line-detectors,some multi-scan modes have been developed. But the existing methods reconstruct-ing an image from the data scanned by multi-scan modes have to rebin the data into fan-beam or parallel-beam form via data interpolation. The data rebinning process not only increases great computational cost,but also degrades image resolution. In this paper,we propose a backprojection-filtration (BPF)-based reconstruction algorithm for rotation-translation (RT) multi-scan mode. An impor-tant feature of the proposed algorithm is that data rebinning process is not introduced. The simulation results have verified the validity of the proposed algorithm.
To acquire the complete CT data for the scan-ning slice of large objects using short line-detectors, some multi-scan modes have been developed. But the the existing methods reconstruct-ing an image from the data scanned by multi-scan modes have to rebin the data into fan-beam or parallel-beam form via data interpolation. The data rebinning process not only increases great computational costs, but also degrades image resolution . In this paper, we propose a backprojection-filtration (BPF) -based reconstruction algorithm for rotation-translation (RT) multi-scan mode. An impor tant feature of the proposed algorithm is that the data rebinning process is not introduced. The simulation results have verified the validity of the proposed algorithm.