首页>
外国专利>
Automatic exposure control for a dental panorama - and - x-ray apparatus cephalography
Automatic exposure control for a dental panorama - and - x-ray apparatus cephalography
展开▼
机译:牙科全景和X射线头颅造影的自动曝光控制
展开▼
页面导航
摘要
著录项
相似文献
摘要
An apparatus and method used in dental panoramic and cephalographic x-ray equipment provides automatic adjustment of the pre-programmed exposure factors in order to obtain optimisation of the grey scale of the talent image on various kinds of x-ray detectors, such as the radiographic film or x-ray image detector plates. A sensor, such as photo diodes, detects the intensity of the radiation passed through the patient and incident on the x-ray detector and feeds it to a control unit. The control unit provides a computed simulation of the latent image grey level and adjusts the programmed exposure factors in order to establish the grey level of the latent image at the required reference value.
展开▼