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The aim was to evaluate image quality produced by a cone-beam CT (CBCT) scanner under various imaging modes. A modulation transfer function (07-538, Nuclear Associates, Carle Place, NY) was placed in an anthropomorphic head phantom (RS-250, Radiology Support Devices, Long Beach, CA). Overall, 67 CBCT scans were obtained by modifying the entire range of kilovolt (kV) and milliampere (mA) settings,...