Provided is a quantitative system for the alveolar bone density using computed tomography which can objectively evaluate the bone density in teeth of a patient. The system comprises: a phantom having the bone mass and the bone quality corresponding to a tooth bone for each of a plurality of steps divided by the quantity and the quality of the tooth bone; an imaging unit for irradiating with an X-ray, and detecting the X-ray transmitting an object to be detected and the phantom; a control unit for comparing a density value of the object to be detected with a density value of the phantom from an image imaged by the imaging unit, and generating an image to display the compared density values; and a display unit for displaying the image generated by the control unit.;COPYRIGHT KIPO 2018
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