Method and apparatus for generating images
First Claim
1. A method of generating images of a specimen containing at least two regions of different opacity to a transmission of radiation therethrough, said method comprising steps of:
- irradiating said specimen with radiation from radiation source means;
detecting said radiation with radiation detector means sensitive to said radiation, said detector means producing a plurality of signals indicative of an amplitude of said radiation passing through said specimen in a corresponding plurality of different directions;
deriving further signals, from said plurality of signals, indicative of contours of maximum local discontinuities in at least one of opacity and texture, said further signals providing an indication of a position of a three-dimensional boundary surface between said at least two regions of different opacity.
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Accused Products
Abstract
A method of generating images of a specimen containing at least two regions of different opacity to the passage of radiation comprises irradiating the specimen with radiation from a radiation source, detecting the radiation to produce a plurality of signals indicative of the amplitude of the radiation passing through the specimen in a corresponding plurality of different directions and processing the signals to derive further signals indicative of contours of maximum local discontinuity in opacity or texture thereby providing an indication of the position of the three-dimensional boundary surface between the two regions.
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Citations
38 Claims
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1. A method of generating images of a specimen containing at least two regions of different opacity to a transmission of radiation therethrough, said method comprising steps of:
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irradiating said specimen with radiation from radiation source means; detecting said radiation with radiation detector means sensitive to said radiation, said detector means producing a plurality of signals indicative of an amplitude of said radiation passing through said specimen in a corresponding plurality of different directions; deriving further signals, from said plurality of signals, indicative of contours of maximum local discontinuities in at least one of opacity and texture, said further signals providing an indication of a position of a three-dimensional boundary surface between said at least two regions of different opacity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus for generating images of a specimen containing at least two regions of different opacity to a transmission of radiation therethrough, comprising:
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radiation source means for directing radiation in a plurality of different directions through said specimen; detector means to detect an amplitude of said radiation after passage through said specimen in each of said plurality of different directions; processing means for processing signals produced by said detector means and deriving signals indicative of contours of maximum local discontinuities in at least one of opacity and texture within said specimen; and image display means for providing a readout of said signals indicative of said contours derived by said processing means.
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10. A method of generating images of a specimen containing at least two objects of different opacity to passage of radiation, said method comprising steps of:
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irradiating said specimen with radiation; detecting an amplitude of said radiation after passing through said specimen in a plurality of different directions; deriving a plurality of two-dimensional contours of said at least two objects of opacity to radiation corresponding to said plurality of different directions; determining at least two maximum local discontinuities of each of said plurality of two-dimensional contours; and determining a position of said at least two objects in three-dimensional space from approximate intersections of said at least two maximum local discontinuities of each of said plurality of two-dimensional contours. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of generating images of a specimen containing at least two objects of different opacity to passage of radiation, said method comprising steps of:
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irradiating said specimen with energy; detecting a response to said energy from a plurality of different directions; deriving a plurality of two-dimensional contours of said at least two objects corresponding to said plurality of different directions; determining at least two maximum local discontinuities of each of said plurality of two-dimensional contours; and determining a position of said at least two objects in three-dimensional space from approximate intersections of said at least two maximum local discontinuities of each of said plurality of two-dimensional contours. - View Dependent Claims (26, 27, 28, 29)
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30. Apparatus for generating images of a specimen containing an object therein, said apparatus comprising:
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an energy source for directing energy through said specimen at said object; a detector array arranged to detect a response to said energy from said object, said energy source and said detector array being capable of operation from a plurality of different directions with respect to said object; processing means, for deriving a plurality of two-dimensional contours of said object from each of said plurality of different directions, for determining at least two maximum local discontinuities of each of said plurality of two-dimensional contours, and for determining a position of said object in three-dimensional space from approximate intersections of said at least two maximum local discontinuities of each of said plurality of two-dimensional contours. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38)
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Specification