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公开(公告)号：US20080130831A1
公开(公告)日：2008-06-05
申请号：US12013876
申请日：2008-01-14
CPC分类号： A61B6/14 , A61B6/025 , A61B6/4233 , H04N2201/0412
摘要： An x-ray diagnostic apparatus and methods performs Real-Time Digital Radiography with particular application in dental x-ray imaging modalities, such as Orthopantomography, Scannography, Linear Tomography and Cephalography, by using a versatile and modular electronic unit, featuring ultra fast computation capability to serve diversified image sensor typology and scanning modality. In Digital Orthopantomography and Scannography, a plurality of tomographic images at different depths of the jaw can be generated, based on the pre-selection made by the user interface. The image processing unit utilizes for the tomo-synthesis 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. It also introduces an automatic adaptation of the frame acquisition rate in frame transfer mode, based on the actual speed of the cassette unit. By this method the dynamic of the exposure signal is reduced, and a better optimization of the signal response of the x-ray detector is achieved.
摘要翻译： X射线诊断装置和方法通过使用多功能和模块化的电子单元执行实时数字射线照相术，具体应用于牙科X射线成像模式，例如Ortho Pantomography，Scannography，线性断层扫描和头颅图，具有超快的计算能力 服务多样化的图像传感器类型和扫描方式。 在数字正交全息扫描和扫描测量中，可以基于用户界面进行的预先选择来生成颚的不同深度的多个断层图像。 图像处理单元利用诊断图像的断层合成准确经济的射线照相胶片速度的数字模拟器，包括馈送胶片盒速度数字输入和高分辨率时钟信号的数字频率合成器，确保准确和可再现的相位连续性 的输出频率信号。 它还基于盒单元的实际速度，引入帧传送模式下的帧采集速率的自动调整。 通过这种方法，降低了曝光信号的动态，并且实现了对x射线检测器的信号响应的更好的优化。
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公开(公告)号：US06553095B2
公开(公告)日：2003-04-22
申请号：US10024873
申请日：2001-12-19
IPC分类号： H05G126
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 latent 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.
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公开(公告)号：US20060126780A1
公开(公告)日：2006-06-15
申请号：US11345465
申请日：2006-02-01
CPC分类号： A61B6/14 , A61B6/025 , A61B6/4233 , H04N2201/0412
摘要： An x-ray diagnostic apparatus and methods performs Real-Time Digital Radiography with particular application in dental x-ray imaging modalities, such as Orthopantomography, Scannography, Linear Tomography and Cephalography, by using a versatile and modular electronic unit, featuring ultra fast computation capability to serve diversified image sensor typology and scanning modality. In Digital Orthopantomography and Scannography, a plurality of tomographic images at different depths of the jaw can be generated, based on the pre-selection made by the user interface. The image processing unit utilizes for the tomo-synthesis 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. It also introduces an automatic adaptation of the frame acquisition rate in frame transfer mode, based on the actual speed of the cassette unit. By this method the dynamic of the exposure signal is reduced, and a better optimization of the signal response of the x-ray detector is achieved.
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公开(公告)号：US07016461B2
公开(公告)日：2006-03-21
申请号：US10205257
申请日：2002-07-25
IPC分类号： A61B6/14
CPC分类号： A61B6/14 , A61B6/025 , A61B6/4233 , H04N2201/0412
摘要： An x-ray diagnostic apparatus and methods performs Real-Time Digital Radiography with particular application in dental x-ray imaging modalities, such as Orthopantomography, Scannography, Linear Tomography and Cephalography, by using a versatile and modular electronic unit, featuring ultra fast computation capability to serve diversified image sensor typology and scanning modality.In Digital Orthopantomography and Scannography, a plurality of tomographic images at different depths of the jaw can be generated, based on the pre-selection made by the user interface.The image processing unit utilizes for the tomo-synthesis 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.It also introduces an automatic adaptation of the frame acquisition rate in frame transfer mode, based on the actual speed of the cassette unit. By this method the dynamic of the exposure signal is reduced, and a better optimization of the signal response of the x-ray detector is achieved.
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公开(公告)号：US07319736B2
公开(公告)日：2008-01-15
申请号：US11345465
申请日：2006-02-01
IPC分类号： A61B6/14
CPC分类号： A61B6/14 , A61B6/025 , A61B6/4233 , H04N2201/0412
摘要： An x-ray diagnostic apparatus and methods performs Real-Time Digital Radiography with particular application in dental x-ray imaging modalities, such as Orthopantomography, Scannography, Linear Tomography and Cephalography, by using a versatile and modular electronic unit, featuring ultra fast computation capability to serve diversified image sensor typology and scanning modality. In Digital Orthopantomography and Scannography, a plurality of tomographic images at different depths of the jaw can be generated, based on the pre-selection made by the user interface. The image processing unit utilizes for the tomo-synthesis 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. It also introduces an automatic adaptation of the frame acquisition rate in frame transfer mode, based on the actual speed of the cassette unit. By this method the dynamic of the exposure signal is reduced, and a better optimization of the signal response of the x-ray detector is achieved.
摘要翻译： X射线诊断装置和方法通过使用多功能和模块化的电子单元执行实时数字射线照相术，具体应用于牙科X射线成像模式，例如Ortho Pantomography，Scannography，线性断层扫描和头颅图，具有超快的计算能力 服务多样化的图像传感器类型和扫描方式。 在数字正交全息扫描和扫描测量中，可以基于用户界面进行的预先选择来生成颚的不同深度的多个断层图像。 图像处理单元利用诊断图像的断层合成准确经济的射线照相胶片速度的数字模拟器，包括馈送胶片盒速度数字输入和高分辨率时钟信号的数字频率合成器，确保准确和可再现的相位连续性 的输出频率信号。 它还基于盒单元的实际速度，引入帧传送模式下的帧采集速率的自动调整。 通过这种方法，降低了曝光信号的动态，并且实现了对x射线检测器的信号响应的更好的优化。
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6.发明授权Speed control unit for direct current electric motor with intrinsic feed-back 失效具有内在反馈功能的直流电动机速度控制装置
公开(公告)号：US5048115A
公开(公告)日：1991-09-10
申请号：US313975
申请日：1989-02-23
申请人： Gianfranco Venturino
发明人： Gianfranco Venturino
IPC分类号： H02P7/28
CPC分类号： H02P7/2805
摘要： It is foreseen to measure the rotational speed (V) of a motor (4) by measuring the electromotive force (e.m.f.) This e.m.f. is calculated as the difference between the terminal voltage (Va) and the voltage drop at a reference resistor (S), through which the armature current flows, then this value is used as a velocity feedback signal for motor regulation. Particularly, the terminal voltage (Va) is cyclically measured at two successive close instants (t1, t2), during which the armature resistance (Ri) and the motor e.m.f. can be considered constant; these terminal voltage values (V.sub.at1, V.sub.at2) are stored, then elaborated to perform the actual armature resistance (Ri) during that interval (t1-t2), then this value is multiplied for the instant current (I). The result is then substracted from the terminal voltage (Va) and only at that time the resulting e.m.f. is used as a velocity feedback signal for the velocity feedback circuit. The apparatus for carrying out this process is also disclosed.
摘要翻译： PCT No.PCT / IT87 / 00073 Sec。 371日期1989年2月23日 102（e）日期1989年2月23日PCT提交1987年7月20日PCT公布。 出版物WO88 / 00771 日期：1988年1月28日。预计通过测量电动势（e.m.f）来测量电动机（4）的转速（V）。 被计算为端子电压（Va）与参考电阻器（S）之间的电压降之差，电枢电流流过该差值，则该值用作电机调节的速度反馈信号。 特别地，在两个连续的紧迫时刻（t1，t2）周期性地测量端电压（Va），在此期间电枢电阻（Ri）和电动机e.m.f 可以认为是常数; 存储这些端子电压值（Vat1，Vat2），然后详细说明在该间隔（t1-t2）期间执行实际的电枢电阻（Ri），然后将该值乘以瞬时电流（I）。 然后将结果从终端电压（Va）中减去，并且仅在那时由此产生的e.m.f. 被用作速度反馈电路的速度反馈信号。 还公开了用于执行该过程的装置。
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