X-ray data sensed by a pixel of a digital sensor can be mapped into a pixel of a digital image linearly or non-linearly (using a sine wave) to boost the certain range of grey levels, enhancing its overall image. Digital imaging systems typically employ a variety of IACs to enhance their images. The radiodensity of the digital X-ray images are expressed by the grey scale, ranging from 0 (black) to 255 (white). 1 X-ray photons that pass through objects with certain attenuation coefficients can activate pixels of the digital sensor and the data are transformed into the digital images on the monitor by the image acquisition control (IAC) of a system. Digital radiographs are being used widely in clinical practice due to its convenience and lower X-ray dosage compared to traditional analogue radiographs using film.
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