Vibration measurement of dental CBCT based on 3D accelerometer

Currently, dental CBCT(Cone-Beam Computed Tomography) is wildly used in the tooth implantation, maxillofacial surgery and the treatment of temporomandibular joint disorders. The three-dimensional images of Dental CBCT are reconstructed based on the projection images, which are obtained at each degree of 360°. The projected image should have a precise correspondence with the angle of rotation of arm. If vibration occurs during the rotation, artifacts will be caused from reconstruction, thus affecting the image quality. It has a very important significance on the image reconstruction if vibration information of CBCT arm can be detected and evaluated. This paper presented a vibration measuring device based 3D accelerometer, which can measure and evaluate vibration of CBCT during operation. With this device, vibration information can be sensed by 3D accelerometer. The analog signals are sampled by Microprocessor with internal ADC converter. Then, all data are sent to PC via wireless communication way. Software written by MATLAB will acquire, display, save and analyze data from measurement device, which makes it possible that evaluates vibration information from CBCT.