| 摘要 |
PROBLEM TO BE SOLVED: To provide a real-time digital X-ray imaging apparatus by which the dynamic of an exposure signal is reduced and better optimization of the signal response of the x-ray detector is achieved. SOLUTION: Real-time digital radiography with particular application in dental x-ray imaging modalities, such as panoramic tomography, scannography, linear tomography, and cephalography, is performed by using a multipurpose and modular electronic unit to serve diversified image sensor topology and scanning modality. A plurality of tomographic images at different depths can be generated, based on the pre-selection made by the user interface. The image processing unit utilizes for the tomosynthesis of the diagnostic image an accurate and economic digital simulator of the radiographic film speed, including a digital frequency synthesizer fed with film cassette speed digital input and high resolution clock signal, ensuring accurate and reproducible phase continuity of the output frequency signal. COPYRIGHT: (C)2009,JPO&INPIT
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