公开(公告)号：WO1993025144A1

公开(公告)日：1993-12-23

申请号：PCT/DK1993000200

申请日：1993-06-11

Applicant: HOLOMED APS ,  NIELSEN, Stig, Pors ,  BÄRENHOLDT, Olaf

Inventor： HOLOMED APS

IPC: A61B06/02

CPC classification number: A61B6/505 ,  A61B6/4035 ,  A61B6/4488 ,  A61B6/482 ,  H04N5/3205 ,  H05G1/26 ,  H05G1/60

Abstract: An apparatus for determination of the mineral content in bones and comprising an X-ray source (12) capable of releasing X-ray radiation at at least two different energy levels for radiation of a preselected target area, and a camera part including a scintillator (22) receiving the X-ray radiation which have passed through the target area and emitting visible light, a CCD-sensor (25), and optical means for focusing the radiation from the scintillator on the CCD-sensor (25). The CCD-sensor communicates with an electronic circuit adapted to read out the CCD-sensor and to transfer data signals to a computer, said data signals representing the received radiation intensity and consequently a number of images (usually two received at their respective energy level) of the part of a person which should be examined. The apparatus is adapted to limit the energy content of the X-ray radiation emitted through the person in such a manner that the skin of said person is not subjected to more than a predetermined, allowed amount of energy. In this mananer an apparatus for determination of the mineral content in bones of living persons is provided, and this apparatus is smaller and less expensive than the hitherto known apparatuses at the same time as it is easy and quick to use, whereby the examination can be performed by a specialized physician.

Abstract translation: 一种用于确定骨骼中的矿物质含量的装置，包括能够以至少两个不同能级释放X射线辐射的X射线源（12），用于辐射预选的目标区域，以及包括闪烁体（ 22）接收已经通过目标区域并发射可见光的X射线辐射，CCD传感器（25）和用于将来自闪烁体的辐射聚焦在CCD传感器（25）上的光学装置。 CCD传感器与适于读出CCD传感器并将数据信号传送到计算机的电子电路进行通信，所述数据信号表示所接收的辐射强度，因此表示数量的图像（通常在其各自的能级接收两个） 应检查的人的一部分。 该装置适于限制通过人发射的X射线辐射的能量含量，使得所述人的皮肤不经受超过预定的允许量的能量。 在这种操作者中，提供了一种用于确定生活者骨骼中的矿物质含量的装置，并且该装置与现有的已知装置相比，容易且快速地使用时更小而便宜，因此检查可以 由专科医师执行。

公开(公告)号：WO1993023952A1

公开(公告)日：1993-11-25

申请号：PCT/SE1993000404

申请日：1993-05-07

Applicant: REGAM MEDICAL SYSTEMS AB ,  NELVIG, Per

Inventor： REGAM MEDICAL SYSTEMS AB

IPC: H04N05/32

CPC classification number: H05G1/60 ,  H04N5/32 ,  H04N5/361

Abstract: The present method and device according to the invention is by a compensation signal to guarantee that picture element within preferably faintly exposed image areas in dental x-raying will be located within a desired signal level interval, which on a video monitor (25) is corresponding to the light intensity which should have been obtained with a dental x-ray film, to thereby on the video monitor (25) facilitate improved dynamics and thus obtain maximum imaging sensitivity for gray level variations, e.g., enamel and dentine in dental x-raying. Additionally is achieved that the strong dependence of the image sensor to, e.g., ambient temperature regarding its dark current is compensated by a signal processing device (20, 23) already upon generation of raw data for the image to thus utilize maximum possible image quality and resolution prior to subsequent processing by a processor (22) by means of a non-linear digitalization (21).

Abstract translation: 根据本发明的本发明的方法和装置是通过补偿信号，以确保在牙齿X射线中优选地微弱曝光的图像区域内的图像元素将位于期望的信号电平间隔内，视频监视器（25）对应于 对于应用牙科X光片获得的光强度，从而在视频监视器（25）上有助于改善动态，并因此获得灰度级变化的最大成像灵敏度，例如牙科x射线中的牙釉质和牙质 。 此外，实现了图像传感器对于其暗电流的例如环境温度的强烈依赖性已经由已经在图像的原始数据生成上的信号处理装置（20,23）补偿，从而利用最大可能的图像质量，并且 在通过非线性数字化（21）由处理器（22）进行后续处理之前的分辨率。

公开(公告)号：WO1992012613A1

公开(公告)日：1992-07-23

申请号：PCT/US1991009702

申请日：1991-12-23

Applicant: FISCHER IMAGING CORPORATION

Inventor： FISCHER IMAGING CORPORATION ,  NIELDS, Morgan, W. ,  ASSA, Menachem ,  NOVAK, Mark, E. ,  PERIN, Pascal

IPC: H05G01/22

CPC classification number: H05G1/46 ,  H05G1/26 ,  H05G1/36 ,  H05G1/60

Abstract: An apparatus and method for dynamically controlling the generation of radiation pulses during pulse-type fluoroscopic imaging. Brightness of an image produced by a pulse (200) is detected (202), converted to a digital value (204) and compared to an acceptable predetermined value range (206, 208). If the brightness is not acceptable, the pulse rate is reset (212) to a predetermined, relatively fast rate and the energy level for the next pulse adjusted up or down (210) to increase or decrease the brightness as necessary. Once the brightness is found to be acceptable, the pulse rate is returned to the original pulse rate (218). If it is determined that motion is occurring (214, 216), the pulse rate will increase (212) to the relatively fast predetermined pulse rate to provide substantially real-time imaging. If the brightness becomes unacceptable (208) for a pulse during the period of motion, the energy level for the subsequent pulse will be adjusted (210). This technique of pulse control effectively reduces patient dosage and operator exposure to radiation, provides substantially real-time imaging during periods of relative motion and provides rapid image stabilization times.

公开(公告)号：WO1988007807A1

公开(公告)日：1988-10-06

申请号：PCT/EP1988000274

申请日：1988-03-28

Applicant: B.V. OPTISCHE INDUSTRIE "e;DE OUDE DELFT"e; ,  VLASBLOEM, Hugo

Inventor： B.V. OPTISCHE INDUSTRIE "e;DE OUDE DELFT"e;

IPC: H05G01/36

CPC classification number: G21K1/04 ,  G21K1/043 ,  G21K1/10 ,  H05G1/36 ,  H05G1/60

Abstract: A method is described for contrast equalization of X-ray photographs made with an apparatus for slit radiography. A controllable absorption device (8) interacts with the slit diaphragm (2) to influence the fanshaped X-ray beam (3) per sector. The absorption device (8) is controlled (10) as a function of the quantity of radiation instantaneously transmitted (11) per sector through a body (7) in a manner such that the quantity of radiation transmitted in a particular sector through the absorption device is reduced with an increasing value of the transmission of the body occuring instantaneously in said sector from a first threshold value upwards. Above the threshold value, a higher transmission value results to a predetermined extent in an essentially higher quantity of radiation transmitted through the body, at least in regions of relevance for the X-ray photograph.

Abstract translation: 描述了用于利用狭缝射线照相设备制造的X射线照片的对比度均衡的方法。 可控吸收装置（8）与狭缝光阑（2）相互作用以影响每扇区的扇形X射线束（3）。 吸收装置（8）作为每个扇区通过主体（7）瞬时传输（11）的辐射量的函数被控制（10），使得通过吸收装置在特定扇区中发射的辐射量 随着从第一阈值向上在所述扇区中立即发生的身体的传输的值的增加而减小。 在阈值之上，至少在与X射线照片相关的区域中，较高的透射值在基本上较高数量的辐射透过身体的结果达到预定的程度。

公开(公告)号：WO1984004878A1

公开(公告)日：1984-12-20

申请号：PCT/US1984000828

申请日：1984-05-31

Applicant: WISCONSIN ALUMNI RESEARCH FOUNDATION

Inventor： WISCONSIN ALUMNI RESEARCH FOUNDATION ,  MISTRETTA, Charles, A. ,  PEPPLER, Walter, W. ,  KUDVA, Balakrishna, V. ,  HASEGAWA, Bruce, H. ,  DOBBINS, James, T.

IPC: A61B06/00

CPC classification number: G21K1/10 ,  H05G1/26 ,  H05G1/60

Abstract: X-ray compensation masks (51) are prepared by exposing an X-ray target object (43), such as a patient, to a first beam of X-rays. The X-ray fluence from the patient is received by an electronic image receptor (44) which provides an output signal indicating the intensity of the X-rays at all positions in the image field. The image information is converted by an image processor (47) to transformed X-ray intensity values for a plurality of pixels which cover the image field. A mask generating controller (48) determines the minimum transformed intensity value for any pixel, assigns to each pixel an attenuation number which is proportional to the difference between the transformed intensity value for the pixel and the minimum transformed intensity value, and issues control signals to a mask former (49) which deposits on a non-attenuating substrate (50) attenuating masses in a two dimensional array of pixels with the mass thickness in each pixel proportional to the attenuation number. When the mask (51) is inserted into the beam from the X-ray source (41), and a second exposure taken, the X-ray fluence passing through both the attenuating mask (51) and the patient (43) will be substantially equalized across the image field.

公开(公告)号：WO2013062051A1

公开(公告)日：2013-05-02

申请号：PCT/JP2012/077612

申请日：2012-10-25

Applicant: 富士フイルム株式会社

Inventor： 大田　恭義 ,  西納　直行 ,  中津川　晴康 ,  岩切　直人 ,  北野　浩一

IPC: A61B6/00 ,  G03B42/04 ,  H04N7/18

CPC classification number: H04N5/225 ,  A61B6/4233 ,  A61B6/4283 ,  A61B6/461 ,  A61B6/487 ,  A61B6/54 ,  A61B6/566 ,  G01T1/2018 ,  G03B42/04 ,  H04N5/32 ,  H04N5/3205 ,  H04N5/321 ,  H04N2005/2255 ,  H05G1/56 ,  H05G1/60 ,  H05G1/64

Abstract: 　ビニング数の増加の切換か否かを判定し、ビニング数が増加する場合に、予め定めた高濃度範囲の画像情報を選択して静止画を生成し、その後所定フレーム経過後に画像情報として選択する濃度範囲が低濃度側へシフトして予め定めた規定範囲の画像情報を選択して静止画を生成する放射線動画処理装置を提供する。

Abstract translation: 提供一种辐射视频处理装置，其确定是否切换到存储槽数量的增加，并且如果存储体数量增加，则选择预定的高浓度范围的图像数据并生成静止图像，然后选择图像数据 在预定的规定范围内，并且在经过规定的帧经过了移动到低浓度侧之后，在作为图像数据选择的浓度范围之后，生成静止图像。

公开(公告)号：WO2006137076A2

公开(公告)日：2006-12-28

申请号：PCT/IL2006/000742

申请日：2006-06-25

Applicant: LAVENDA, David ,  LAVENDA, Ronald ,  DEVIR, Michal ,  ARLINSKY, David ,  GOLDENBERG, Gershon

Inventor： LAVENDA, David ,  LAVENDA, Ronald ,  DEVIR, Michal ,  ARLINSKY, David ,  GOLDENBERG, Gershon

IPC: G01S13/00

CPC classification number: A61B6/4405 ,  A61B6/4441 ,  A61B6/4488 ,  A61B6/508 ,  A61B6/548 ,  H05G1/60

Abstract: A handheld radiographic device is provided, the device may include an X- ray detector adapted to provide a digital radiographic frame of a dynamic image of an object under investigation, a position determination subsystem adapted to provide position data associated with a digital radiographic frame and an image processing controller adapted to combine multiple radiographic frames using the position data associated with each of the radiographic frames and thus to produce a static image. Moreover, a method is provided for producing a static image from multiple radiographic frames using a handheld radiographic device.

Abstract translation: 提供了一种手持射线照相装置，该装置可包括适于提供被调查对象的动态图像的数字射线照相帧的X射线检测器，位置确定子系统，适于提供与数字射线照像帧相关的位置数据，以及 图像处理控制器，其适于使用与每个放射照相帧相关联的位置数据组合多个射线照相帧，并且因此产生静态图像。 此外，提供了一种用于使用手持射线照相装置从多个射线照相帧产生静态图像的方法。

公开(公告)号：WO00052972A1

公开(公告)日：2000-09-08

申请号：PCT/JP2000/001238

申请日：2000-03-02

IPC: H05G1/34 ,  G01N23/04 ,  H01J35/04 ,  H05G1/10 ,  H05G1/30 ,  H05G1/60 ,  H05G1/62

CPC classification number: G01N23/04 ,  H01J35/04 ,  H05G1/10 ,  H05G1/30 ,  H05G1/60 ,  H05G1/62

Abstract: In the absence of pulses from a pulse generator (105) when an object (5) to be inspected is not in the imaging range (a range of irradiation by an X-ray source (1)) in an X-ray image intensifier (2), the voltage applied by the grid voltage control (110) to a first grid electrode (71) in an X-ray tube (11) is controlled with respect to a predetermined negative voltage at a negative voltage generator (112), whereas in the presence of pulses from a pulse generator (105) when an object (5) to be inspected is in the imaging range (a range of irradiation by an X-ray source (1)) in an X-ray image intensifier (2) in the absence of pulses from a pulse generator (105), the voltage applied by the grid voltage control (110) to a first grid electrode (71) in an X-ray tube (11) is controlled with respect to a positive reference voltage at a reference voltage generator (115), thereby stabilizing both cutoff voltage and grid voltage.

Abstract translation: 当在X射线图像增强器中（待检查对象（5）不在成像范围内（X射线源（1）的照射范围））时，在不存在来自脉冲发生器（105）的脉冲的情况下 如图2所示，通过电压控制（110）施加到X射线管（11）中的第一栅极（71）的电压相对于负电压发生器（112）处的预定负电压被控制，而 当检测对象（5）处于X射线图像增强器（2）中的成像范围（X射线源（1）的照射范围）时，来自脉冲发生器105的脉冲存在） ）在不存在来自脉冲发生器（105）的脉冲的情况下，通过电弧电压控制（110）施加到X射线管（11）中的第一栅极（71）的电压相对于正参考 电压在参考电压发生器（115）处，从而稳定截止电压和电网电压。

公开(公告)号：WO1996020579A1

公开(公告)日：1996-07-04

申请号：PCT/IB1995001041

申请日：1995-11-21

Applicant: PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB

Inventor： PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB ,  VAN WOEZIK, Johannes, Theodorus, Maria ,  VAN TWIST, Paulus, Henricus, Felix, Maria

IPC: H05G01/26

CPC classification number: H05G1/34 ,  H05G1/60

Abstract: An X-ray examination apparatus comprises an exposure control circuit (20) which supplies a control signal for adjustment of the X-ray source (1). The exposure control circuit (20) determines the control signal from an area of the X-ray image in which no overexposure occurs. To this end, the exposure control circuit comprises a selection unit (23) for determining a measuring part from an electronic image signal, formed from the X-ray image by means of an X-ray detector (5, 8, 7), by comparing the signal level of the electronic image signal with an upper limit value which is dependent on the setting of the X-ray apparatus, for example of the high voltage and the anode current of the X-ray source. The upper limit value preferably amounts to the difference between the overexposure level and a safety margin. The safety margin serves to render the exposure control circuit insensitive to small fluctuations of the intensity and energy of the X-ray beam (3) generated by the X-ray source (1).

Abstract translation: X射线检查装置包括提供用于调整X射线源（1）的控制信号的曝光控制电路（20）。 曝光控制电路（20）从不会发生过度曝光的X射线图像的区域确定控制信号。 为此，曝光控制电路包括用于通过X射线检测器（5,8,7）由X射线图像由电子图像信号确定测量部分的选择单元（23），通过X射线检测器 将电子图像信号的信号电平与取决于X射线设备的设置（例如X射线源的高电压和阳极电流）的上限值进行比较。 上限值优选地等于过度曝光水平和安全裕度之间的差。 安全裕度用于使曝光控制电路对由X射线源（1）产生的X射线束（3）的强度和能量的小波动不敏感。

公开(公告)号：WO1995022115A1

公开(公告)日：1995-08-17

申请号：PCT/US1995001532

申请日：1995-02-06

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  HU, Hui

IPC: G06F159/00

CPC classification number: G06T11/008 ,  G01N23/046 ,  G01N2223/419 ,  G06T2211/421 ,  H05G1/60 ,  Y10S378/901

Abstract: A computed tomography x-ray imaging system (10) acquires a three-dimensional array of x-ray attenuation values using a cone beam x-ray source (13) and a curved two-dimensional array (16) of detector elements. Two-dimensional image slices are reconstructed using a filtered backprojection method, and corrections are made to the images to account for inaccuracies in the reconstruction method and for incomplete data due to the cone beam geometry.

Abstract translation: 计算机断层摄影X射线成像系统（10）使用锥形束x射线源（13）和检测器元件的弯曲二维阵列（16）获取X射线衰减值的三维阵列。 使用滤波反投影方法重建二维图像切片，并且对图像进行校正以解决重建方法中的不准确以及由于锥形束几何形状而导致的不完整数据。