US3769507A
Expired / Lapsed
US
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Dynamic radiography
Assignee: Research Corp
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Filing: 1971-08-25
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Granted: 1973-10-30
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Expires: 1991-08-25
Abstract
Abstract A dynamic radiography system for examining an optically opaque object containing radiation scattering centers by irradiating the object with penetrating radiation to cause radiation scattering by these scattering centers, causing periodic vibration of these scattering centers, detecting radiation scattered by the scattering centers in the object along at least two noncongruent detection channels which are at an angle with each other and which intersect at a common volume within the object, and correlating the outputs of the detectors with a frequency parameter of the vibration to derive thereby information of internal physical and mechanical characteristics of the object.
Inventors
- 👤 E Kenney
- 👤 A Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:13
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/10; G21K1/12; G01; G01N; G01N23/00; G01N23/20; G01N23/201
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
125 words
Apparatus for examining an optically opaque object containing penetrating radiation scattering centers, comprising: a. means for irradiating the object with penetrating radiation to cause radiation scattering by scattering centers in the object; b. means for causing periodic vibration of said scattering centers within the object; c. means for detecting radiation scattered by scattering centers in the object along at least two noncongruent detection channels which are at an angle with each other and which intersect at a common volume within the object; and d. means for correlating information generated by said detecting means in response to detected scattered radiation with information representing the periodic vibration of said scattering centers within the object to derive thereby information of internal physical and mechanical characteristics of the object.
Claim 2
Dependent Claim
125 words
Apparatus for examining an optically opaque object containing penetrating radiation scattering centers, comprising: a. means for irradiating the object with penetrating radiation to cause radiation scattering by scattering centers in the object; b. means for causing periodic vibration of said scattering centers within the object; c. means for detecting radiation scattered by scattering centers in the object along at least two noncongruent detection channels which are at an angle with each other and which intersect at a common volume within the object; and d. means for correlating information generated by said detecting means in response to detected scattered radiation with information representing the periodic vibration of said scattering centers within the object to derive thereby information of internal physical and mechanical characteristics of the object.
Claim 3
Dependent Claim
18 words
Apparatus as in claim 1 including means for causing a scan of the object by said common volume.
Claim 4
Dependent Claim
23 words
Apparatus as in claim 2 wherein said scan causing means comprise means for causing relative motion between the detection means and the object.
Claim 5
Dependent Claim
22 words
Apparatus as in claim 3 wherein said relative motion between the detecting means and the object is along a defined scanning pattern.
Claim 6
Dependent Claim
61 words
Apparatus as in claim 1 wherein the detecting means comprise two detection systems each providing an image of the radiation scatteed from at least a portion of the object along one of the two directions defined by said detection channels, with selected pairs of points, one on each detection system image, defining radiation scattered from a common volume of the object.
Claim 7
Dependent Claim
33 words
Apparatus as in claim 5 including means for scanning the object comprising means for successively examining different selected pairs of points on the detection system images to simulate a scan of the object.
Claim 8
Dependent Claim
32 words
Apparatus as in claim 6 wherein the correlating means include means for correlating parameters of the selected pairs of points with the vibrating means to enhance differences between different pairs of points.
Claim 9
Dependent Claim
29 words
Apparatus as in claim 7 wherein the scanning means include video camera means for electronically scanning the detection system images in a synchronism simulating a scan of the object.
Claim 10
Dependent Claim
31 words
Apparatus as in claim 1 wherein the irradiating means comprise a radiation source located outside the object and generating a radiation beam impinging on, and at least partly penetrating the object.
Claim 11
Dependent Claim
22 words
Apparatus as in claim 1 wherein the irradiating means comprise a radiation source located within the object and generating a radiation beam.
Claim 12
Dependent Claim
20 words
Apparatus as in claim 1 wherein the irradiating means comprise radioactive material interspersed with said scattering centers in the object.
Claim 13
Dependent Claim
80 words
Apparatus as in claim 1 wherein the detection means comprise two detectors each responsive to scattered radiation along a different one of said detection channels and generating an output signal representative of detected scattered radiation, and wherein the correlating means comprise means for receiving as input signals the outputs of the two detectors and a signal representative of a frequency parameter of the vibrating means and for generating a correlated output signal enhancing the similarities between the three input signals.
Claim 14
Dependent Claim
12 words
Apparatus as in claim 12 wherein the correlating means is a cross-correlator.
Claim 15
Dependent Claim
84 words
Apparatus as in claim 1 wherein the detecting means comprise two detection systems each having a screen imaging scattered radiation along a different one of said two detection channels and each comprising a dynamic collimator having a grid of openings each passing a scattered radiation beam along a portion of the associated detection channel, with pairs of selected openings, one from each detection system, defining a common volume within the object, and with each opening defining an image point on the detection system screen.
Claim 16
Dependent Claim
21 words
Apparatus as in claIm 14 including means for scanning the detection system image screens to simulate a scan of the object.
Claim 17
Dependent Claim
19 words
Apparatus as in claim 15 wherein the scanning means include means for simulating a three-dimensional scan of the object.
Claim 18
Dependent Claim
41 words
Apparatus as in claim 15 wherein each of the detection systems includes an image intensifier forming said image screen and wherein each detection system includes a video camera for electronically scanning said image screens to simulate a scan of the object.
Claim 19
Dependent Claim
19 words
Apparatus as in claim 17 wherein said scanning means include means for simulating a three-dimensional scan of the object.
Claim 20
Dependent Claim
120 words
Method of examining an optically opaque object containing penetrating radiation scattering centers, comprising the steps of: a. irradiating the object with penetrating radiation to cause radiation scattering by scattering centers in the object; b. causing periodic vibration of said scattering centers within the object; c. detecting radiation scattered by scattering centers in the object along at least two noncongruent detection channels which are at an angle with each other and which intersect at a common volume within the object; and d. correlating information generated by said detecting means in response to detected scattered radiation with information representing the periodic vibration of the scattering centers within the object to derive thereby information of internal physical and mechanical characteristics of the object.
Claim 21
Dependent Claim
120 words
Method of examining an optically opaque object containing penetrating radiation scattering centers, comprising the steps of: a. irradiating the object with penetrating radiation to cause radiation scattering by scattering centers in the object; b. causing periodic vibration of said scattering centers within the object; c. detecting radiation scattered by scattering centers in the object along at least two noncongruent detection channels which are at an angle with each other and which intersect at a common volume within the object; and d. correlating information generated by said detecting means in response to detected scattered radiation with information representing the periodic vibration of the scattering centers within the object to derive thereby information of internal physical and mechanical characteristics of the object.
Claim 22
Dependent Claim
23 words
Method as in claim 19 including the step of scanning the object by the common volume at which the two detection channels intersect.
Claim 23
Dependent Claim
22 words
Method as in claim 20 wherein said scanning is carried out by causing relative motion between the detection means and the object.
Claim 24
Dependent Claim
73 words
Method as in claim 19 wherein the detecting step includes imaging radiation along each of said detection channels to provide thereby a pair of screen images, each screen image representing radiation scattered along one of said detection channels and each having a plurality of points representing radiation scattered along portions of the detection channel, with selected pairs of points, one on each screen, defining radiation scattered from a common volume of the object.
Claim 25
Dependent Claim
26 words
Method as in claim 22 including the step of successively examining different selected pairs of points of the screens to simulate a scan of the object.
Claim 26
Dependent Claim
29 words
Method as in claim 23 wherein the correlating step includes correlating parameters of the selected pairs of points with the vibrating to enhance differences between different pairs of points.
Claim 27
Dependent Claim
117 words
Method of examining an optically opaque object which contains penetrating radiation scattering centers undergoing periodic vibrational motion, comprising the steps of: a. irradiating the object with penetrating radiation to cause radiation scattering by said periodically vibrating scattering centers in the object; b. detecting radiation scattered by scattering centers in the object along at least two noncongruent detection channels which are at an angle with each other and which intersect at a common volume within the object; and c. correlating information generated by said detecting means in response to detected scattered radiation with information representing the periodic vibration of the scattering centers within the object to derive thereby information of internal physical and mechanical characteristics of the object.
Claim 28
Dependent Claim
117 words
Method of examining an optically opaque object which contains penetrating radiation scattering centers undergoing periodic vibrational motion, comprising the steps of: a. irradiating the object with penetrating radiation to cause radiation scattering by said periodically vibrating scattering centers in the object; b. detecting radiation scattered by scattering centers in the object along at least two noncongruent detection channels which are at an angle with each other and which intersect at a common volume within the object; and c. correlating information generated by said detecting means in response to detected scattered radiation with information representing the periodic vibration of the scattering centers within the object to derive thereby information of internal physical and mechanical characteristics of the object.
Claim 29
Dependent Claim
19 words
Method as in claim 25, including the step of causing a scan of the object by said common volume.
Claim 30
Dependent Claim
43 words
Method as in claim 25 wherein the detecting step includes imaging on image screens radiation scattered along each of said detection channels, with selected pairs of points, one on each detection image screen defining radiation scattered from a common volume of the object.
Claim 31
Dependent Claim
31 words
Method as in claim 21 including the step of scanning the object by successively examining different selected pairs of points on the image screen to simulate a scan of the object.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |