公开(公告)号：US20160070021A1

公开(公告)日：2016-03-10

申请号：US14932942

申请日：2015-11-04

申请人： NUCSAFE, INC.

发明人： Steven W. Pauly

IPC分类号： G01V5/00 ,  G01N23/203

CPC分类号： G01V5/0025 ,  A61B6/483 ,  G01N23/203 ,  G01N2223/053 ,  G01N2223/314 ,  G01N2223/345

摘要： An X-ray backscatter imaging system uses frequency modulated X-rays to determine depth of features within a target. An X-ray source generates X-ray radiation modulated by a frequency-modulated bias current. The X-ray radiation impinges upon and is backscattered from multiple depths within the target. A scintillating material receives the backscattered X-rays and generates corresponding photons. A photodetector, having gain modulated by the frequency modulation signal from the local oscillator, receives the photons from the scintillating material and generates an analog output signal containing phase delay information indicative of the distance travelled by the X-rays backscattered from multiple depths within the target. The analog output signal is sampled by an analog-to-digital converter to create a digital output signal. A computer processor performs a discrete Fourier transform on the digital output signal to provide target depth information based on the phase delay information.

公开(公告)号：US09329300B2

公开(公告)日：2016-05-03

申请号：US14932942

申请日：2015-11-04

申请人： Nucsafe, Inc.

发明人： Steven W. Pauly

IPC分类号： G01N23/203 ,  G01V5/00

CPC分类号： G01V5/0025 ,  A61B6/483 ,  G01N23/203 ,  G01N2223/053 ,  G01N2223/314 ,  G01N2223/345

摘要： An X-ray backscatter imaging system uses frequency modulated X-rays to determine depth of features within a target. An X-ray source generates X-ray radiation modulated by a frequency-modulated bias current. The X-ray radiation impinges upon and is backscattered from multiple depths within the target. A scintillating material receives the backscattered X-rays and generates corresponding photons. A photodetector, having gain modulated by the frequency modulation signal from the local oscillator, receives the photons from the scintillating material and generates an analog output signal containing phase delay information indicative of the distance travelled by the X-rays backscattered from multiple depths within the target. The analog output signal is sampled by an analog-to-digital converter to create a digital output signal. A computer processor performs a discrete Fourier transform on the digital output signal to provide target depth information based on the phase delay information.

公开(公告)号：US09201028B2

公开(公告)日：2015-12-01

申请号：US14108571

申请日：2013-12-17

申请人： Nucsafe, Inc.

发明人： Steven W. Pauly

IPC分类号： G01N23/20 ,  G01N23/203 ,  A61B6/00 ,  G01V5/00

CPC分类号： G01N23/203 ,  A61B6/483 ,  G01N2223/053 ,  G01V5/0025

摘要： An X-ray backscatter imaging system uses frequency modulated X-rays to determine depth of features within a target. An X-ray source generates X-ray radiation modulated by a frequency-modulated bias current. The X-ray radiation impinges upon and is backscattered from multiple depths within the target. A scintillating material receives the backscattered X-rays and generates corresponding photons. A photodetector, having gain modulated by the frequency modulation signal from the local oscillator, receives the photons from the scintillating material and generates an analog output signal containing phase delay information indicative of the distance travelled by the X-rays backscattered from multiple depths within the target. The analog output signal is sampled by an analog-to-digital converter to create a digital output signal. A computer processor performs a discrete Fourier transform on the digital output signal to provide target depth information based on the phase delay information.

摘要翻译： X射线反向散射成像系统使用频率调制的X射线来确定目标内的特征的深度。 X射线源产生由调频偏置电流调制的X射线辐射。 X射线辐射照射并且从目标内的多个深度反向散射。 闪烁材料接收背散射X射线并产生相应的光子。 具有由来自本地振荡器的调频信号调制的增益的光电检测器从闪烁材料接收光子，并产生包含相位延迟信息的模拟输出信号，该相位延迟信息指示由目标内的多个深度反向散射的X射线行进的距离 。 模拟输出信号由模拟数字转换器采样，以产生数字输出信号。 计算机处理器对数字输出信号执行离散傅里叶变换，以基于相位延迟信息提供目标深度信息。

公开(公告)号：US20150168137A1

公开(公告)日：2015-06-18

申请号：US14108571

申请日：2013-12-17

申请人： Nucsafe, Inc.

发明人： Steven W. Pauly

IPC分类号： G01B15/02 ,  G01N23/203

CPC分类号： G01N23/203 ,  A61B6/483 ,  G01N2223/053 ,  G01V5/0025

摘要： An X-ray backscatter imaging system uses frequency modulated X-rays to determine depth of features within a target. An X-ray source generates X-ray radiation modulated by a frequency-modulated bias current. The X-ray radiation impinges upon and is backscattered from multiple depths within the target. A scintillating material receives the backscattered X-rays and generates corresponding photons. A photodetector, having gain modulated by the frequency modulation signal from the local oscillator, receives the photons from the scintillating material and generates an analog output signal containing phase delay information indicative of the distance travelled by the X-rays backscattered from multiple depths within the target. The analog output signal is sampled by an analog-to-digital converter to create a digital output signal. A computer processor performs a discrete Fourier transform on the digital output signal to provide target depth information based on the phase delay information.

摘要翻译： X射线反向散射成像系统使用频率调制的X射线来确定目标内的特征的深度。 X射线源产生由调频偏置电流调制的X射线辐射。 X射线辐射照射并且从目标内的多个深度反向散射。 闪烁材料接收背散射X射线并产生相应的光子。 具有由来自本地振荡器的调频信号调制的增益的光电检测器从闪烁材料接收光子，并产生包含相位延迟信息的模拟输出信号，该相位延迟信息指示由目标内的多个深度反向散射的X射线行进的距离 。 模拟输出信号由模拟数字转换器采样，以产生数字输出信号。 计算机处理器对数字输出信号执行离散傅里叶变换，以基于相位延迟信息提供目标深度信息。