<prompt> In Cone Beam Radiography, raw digital data for reconstruction is obtained from:120 exposures projections240 exposures projections360 exposures projections480 exposures projections  <response>: All computed tomographic CT scanners consist of an X-ray source and detector mounted on a rotating gantry. During rotation of the gantry, the X-ray source produces radiation, while the receptor records the residual X-rays after attenuation by the patients tissues. These recordings constitute the raw data that is reconstructed by a computer algorithm to generate cross-sectional images. The basic component of these grayscale images is the picture element pixel values. The grayscale value or intensity of each pixel is related to the intensity of the photons incident on the detector. Although providing similar images, CBCT imaging represents a separate evolutionary arm to CT imaging employing multidetector computed tomographic MDCT imaging equipment. Reference: White and Pharoahs Oral Radiology Principles and Interpretation 7th edition page no 184 