Detection device and process by x-ray imaging with very low dose of objects carried by a moving subject
First Claim
1. A device for X-ray imaging detection of objects on a moving subject with respect to said detection device, according to a direction of advance (Y), said device comprising:
- a fixed source of X-rays (1), adapted to emit a flux of X-rays so as to irradiate said subject, the photons generated having an energy comprised between 10 keV and 120 keV,a fixed X-ray detector (2) comprising at least one column formed of m pixels, adapted to produce simultaneously m electric signals to form a column image, m being higher than or equal to 1, said subject moving in front of a column of pixels during a time of transit Tp, and one point of said subject moving in from of said column of pixels during a time tp,means (4) for controlling and synchronizing said X-ray source (1) and said X-ray detector (2), andmeans (3) for digital processing and visualization of said electric signals adapted to reproduce an image of the subject,characterized in that;
beam-shaping means (6) are arranged in front of said X-ray source (1), said beam shaping means (6) being capable of shaping the X-rays emitted by the X-ray source (1) to produce a curtain X-ray beam (7) with a width L close than that of a column of pixels of the X-ray detector (2) and directed to said column of pixels,said X-ray detector (2) is a sensitive and fast detector having a response time lower than 10 μ
s, said X-ray detector (2) and the control and synchronization means (4) being adapted to carry out a series of n samplings, each having a time-duration te, during the passage of the subject in front of the column of pixels of said X-ray detector (2) during the time Tp, generating n column images, the sampling time-duration te being shorter than or equal to the time of transit tp of one point of said subject in front of a column of pixels.
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Accused Products
Abstract
A device and a method for X-ray imaging detection of objects on a moving subject, according to a direction of advance, the device includes an X-ray source, a fixed X-ray detector including at least one column formed of m pixels adapted to detect the radiation coming from the interaction of the flux of X-rays with the subject, beam-shaping element adapted to produce a curtain X-ray beam with a width close than that of a column of pixels of the X-ray detector and directed to the column of pixels, two rigid lateral supports adapted to support the X-ray detector, and the beam-shaping element. The X-ray detector is sensitive, has a response time lower than 10 μs, and is adapted to carry out a series of n samplings, each having a time-duration te, during the passage of the subject in front of the column of pixels during the time Tp, generating n column images, the sampling time-duration te being shorter than or equal to the time of transit tp of one point of the subject in front of a column of pixels.
4 Citations
14 Claims
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1. A device for X-ray imaging detection of objects on a moving subject with respect to said detection device, according to a direction of advance (Y), said device comprising:
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a fixed source of X-rays (1), adapted to emit a flux of X-rays so as to irradiate said subject, the photons generated having an energy comprised between 10 keV and 120 keV, a fixed X-ray detector (2) comprising at least one column formed of m pixels, adapted to produce simultaneously m electric signals to form a column image, m being higher than or equal to 1, said subject moving in front of a column of pixels during a time of transit Tp, and one point of said subject moving in from of said column of pixels during a time tp, means (4) for controlling and synchronizing said X-ray source (1) and said X-ray detector (2), and means (3) for digital processing and visualization of said electric signals adapted to reproduce an image of the subject, characterized in that; beam-shaping means (6) are arranged in front of said X-ray source (1), said beam shaping means (6) being capable of shaping the X-rays emitted by the X-ray source (1) to produce a curtain X-ray beam (7) with a width L close than that of a column of pixels of the X-ray detector (2) and directed to said column of pixels, said X-ray detector (2) is a sensitive and fast detector having a response time lower than 10 μ
s, said X-ray detector (2) and the control and synchronization means (4) being adapted to carry out a series of n samplings, each having a time-duration te, during the passage of the subject in front of the column of pixels of said X-ray detector (2) during the time Tp, generating n column images, the sampling time-duration te being shorter than or equal to the time of transit tp of one point of said subject in front of a column of pixels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification