TH72197B - An examination using X-rays, which are both transmitted simultaneously and close to each other, and reproduce scattered images. - Google Patents

Abstract

The invention DC60 offers an X-ray imaging inspection system for bags and packaging, the transmission imaging is performed using a fan-shaped beam and a modular detector while the image is generated. Dispersion was performed with the analyzed pencil-shaped beams, with the two rays being agile at the same time. The cross-beam interpolation was reduced by a combination of shielding, detector designation. Scatter, Positioning and Orientation And image processing, image processing, subtracts the measured radiation scattered from the beam, the transmission into the scatter detector, which reduces Cross insertion

Claims (1)

Revised 25/10/2019 No claims --------------- ------14/12/2018------(OCR) Page 8 of 10 pages or any other device containing instructions which can be executed by such processor, but not limited to these devices. In other forms of this invention, cross-interference between the transmission imaging subsystem and the backscatter imaging subsystem is reduced by a combination of parallel vanes, shielding material and backscatter detector orientation as shown in System 100 in Figure 3, where object 120 is examined, such as packaging or a bag. It is first conveyed via conveyor belt 123 through a fan-shaped X-ray beam 125. Note the following improvements over the system in Figure 1: (a) The sensitive surface of the backscatter detector 140 can be angled toward the point 143 from which the backscatter signal is emitted. This geometry maximizes the detection of backscatter signals after the backscatter beam 135 while minimizing the detection of cross-interference from the transmission beam. This geometry also eliminates the need for a parallel adjuster vane on the left detector. All other surfaces 175 of the backscatter detector may be shielded with a shielding material, such as lead, to minimize the detection of residual X-rays. (b) A single vertical vane 150 shields the sensitive face of the right backscatter detector from detecting scattered radiation from the transmission beam 125. (c) Lead shielding 170 under conveyor belt 123 near the transmission beam shields the left backscatter detector 140 from detecting scattered radiation from the transmission beam. (d) A parallel adjuster 180 in front of the transmission detector prevents scattered radiation from the transmission beam exiting the front face of the transmission detector 130 from reaching the backscatter detector 140. Frame ratio correction. Because the transmit and scattered images are obtained using two different methods, the images generally have different frame ratios. Therefore, the same object can appear as ------------ ------21/03/2018------(OCR) Page 1 of 4 pages. Claims 1. A system for object detection, whereby the system has the following components: a. A primary radiation source emitting a fan-shaped beam of penetrating radiation. b. A segmented array of detector elements for measuring the intensity of penetrating radiation transmitted through the object by the primary radiation source. c. A secondary radiation source emitting a pencil-shaped beam for scanning and analyzing penetrating radiation. d. At least one scatter detector for detecting penetrating radiation scattered from the pencil-shaped beam during scanning and analyzing by the object. and e. A processor, memory, and display device, whereby the memory contains instructions that enable the processor to remove the background signal from the signal measured by the scatter detector, whereby the background signal... The above is measured by a scatter detector when the scanning pencil beam does not illuminate the object, generating a measured and corrected scatter signal. This measured and corrected scatter signal and the transmission signal measured from the segmented array of the detector elements are displayed on the display device for object inspection. 2. The system according to claim 1 where the first radiation source emits a fan-shaped beam and the second radiation source emits a scanning pencil beam are of the same type. 3. The system according to claim 1 where at least one scatter detector has a mechanism for adjusting the penetrating radiation alignment, where penetrating radiation from the scanning pencil beam is specifically detected. 4. The system according to claim 1 where at least one scatter detector has sufficient planar faces, where these planar faces are sensitive to incident radiation, and there are 2 of 4 planar faces with a special characteristic perpendicular line to the face. And where the perpendicular line to the face is aligned sufficiently toward the point of incidence of the scatter beam in scanning analysis of the object. 5. System according to claim 4, where at least one surface of the scatter detector, other than the planar face, is shielded to reduce the detection of penetrating radiation from the scatter beam. 6. System according to claim 1, which also has a barrier placed between the scatter beam and at least one scatter detector, such that the signal measured by the scatter detector due to the scatter beam is reduced. 7. System according to claim 6, where the barrier is a curtain placed sufficiently parallel to the scatter beam. 8. System according to claim 6, where the barrier is a swivel shielding material placed sufficiently parallel to the scatter beam. 9. System according to claim 6, where the barrier is a shielding material placed sufficiently perpendicular to the scatter beam. 10. System according to claim 1, where the memory also contains instructions for the processor. Adjust the aspect ratio and size of the measured transmittance signal and the measured dispersion signal, which have been corrected, so that the size and shape of the object appear similar in the display device. The measured transmittance signal and the measured dispersion signal displayed in the display device have been corrected. 11. System under claim 1, where the segmented array of detector elements has a first element measuring radiation in the first energy range and a second element measuring radiation in the second energy range. 12. System under claim 11, where the memory also contains instructions to instruct the processor to determine the effective atomic number of at least one object using measurements from the first element and measurements from the second element, and display an image of at least one such object showing its effective atomic number on the display device. Page 3 of 4 pages. 13. System under claim 1, where the segmented array of detector elements has... The parallel modulator reduces penetrating radiation in the form of a fan-shaped beam scattered from the segmented array of the detector and incident on the scatter detector. 14. Object detection system, which has the following components: a. A primary radiation source that emits a fan-shaped beam of penetrating radiation. b. A segmented array of detector elements to measure the intensity of penetrating radiation transmitted through the object from the primary radiation source. This array has a parallel modulator to block the scattered radiation emitted by the array. c. A second radiation source that emits a pencil-shaped beam for scanning and analyzing penetrating radiation. d. At least one scatter detector to detect penetrating radiation scattered from the pencil-shaped beam during scanning and analysis by the object. This scatter detector also has a mechanism to block radiation scattered from the fan-shaped beam. and e. Processor, memory, and display device. This memory contains instructions that enable the processor. The background signal is removed from the signal measured by the scatter detector, where the background signal is measured by the scatter detector when the second radiation source does not illuminate the object. This generates a measured, corrected scatter signal and displays the measured, corrected scatter signal and the transmission signal measured by the segmented array of detector elements for use in examining the object, displayed on a display device. 15. System according to claim 14, where the first radiation source emits a fan-shaped beam and the second radiation source emits a pencil-shaped beam for scanning analysis as the same type of radiation source. Page 4 of 4. 16. System according to claim 14, where the segmented array of detector elements has a first element that measures radiation in the first energy range and a second element that measures radiation in the second energy range, and where the memory also contains an instruction that instructs the processor to adjust the frame ratio and size of the measured transmission signal and the measured, corrected scatter signal. Given that the size and shape of the object appear similar on the display device, the measured transmit signal and the measured scatter signal are corrected. Consider determining the effective atomic number of at least one part of the object using measurements from the first component set and measurements from the second component set, and display an image of at least one part of the object showing the effective atomic number of that part on the display device. 1. The object detection system consists of: a. A primary radiation source that emits a fan-shaped beam of penetrating radiation; b. A segmented array detector for measuring the intensity of penetrating radiation transmitted through the object by the primary radiation source; c. A second radiation source that emits a pencil-shaped beam for scanning and analyzing the penetrating radiation; d. At least one scatter detector for detecting penetrating radiation scattered from the pencil-shaped beam during the scanning and analyzing process by the object; and e. A processor, memory, and display device. The memory contains instructions that allow the processor to subtract the background signal from the signal measured by the scatter detector. This background signal, measured by the scatter detector when the pencil-shaped beam during the scanning and analyzing process is not illuminating the object, thus forming the corrected measured scatter signal. The corrected measured scatter signal and the transmission signal measured by the segmented array detector are then displayed on the display device.