The present invention relates to a high-speed oral radiation sensor and an oral tomography apparatus including the same. A driving unit including a motor for driving the movement of the instrument arm, the instrument unit including a radiation irradiation device, the driving unit operating the motor to change the position of the arm according to a driving signal, and according to the start of the inspection , Controlling radiation to perform tomography, but transmitting the driving signal for changing the position of the arm to the driving unit to control the radiation irradiator so that the radiation is irradiated at the changed position of the arm, the and a controller for generating a three-dimensional tomography image by collecting electrical signals for radiation passing through the diagnostic object through a radiation detection sensor installed on the opposite side of the radiation irradiation device with the diagnostic object interposed therebetween.
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