New! View global litigation for patent families

USRE28544E - Radiant energy imaging with scanning pencil beam - Google Patents

Radiant energy imaging with scanning pencil beam Download PDF

Info

Publication number
USRE28544E
USRE28544E US49386874A USRE28544E US RE28544 E USRE28544 E US RE28544E US 49386874 A US49386874 A US 49386874A US RE28544 E USRE28544 E US RE28544E
Authority
US
Grant status
Grant
Patent type
Prior art keywords
means
energy
radiant
beam
ray
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UNITED STATES TRUST Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
    • G01V5/00Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity
    • G01V5/0008Detecting hidden objects, e.g. weapons, explosives
    • G01V5/0016Active interrogation, i.e. using an external radiation source, e.g. using pulsed, continuous or cosmic rays
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00Investigating or analysing materials by the use of wave or particle radiation not covered by G01N21/00 or G01N22/00, e.g. X-rays or neutrons
    • G01N23/02Investigating or analysing materials by the use of wave or particle radiation not covered by G01N21/00 or G01N22/00, e.g. X-rays or neutrons by transmitting the radiation through the material
    • G01N23/04Investigating or analysing materials by the use of wave or particle radiation not covered by G01N21/00 or G01N22/00, e.g. X-rays or neutrons by transmitting the radiation through the material and forming a picture
    • G01N23/043Investigating or analysing materials by the use of wave or particle radiation not covered by G01N21/00 or G01N22/00, e.g. X-rays or neutrons by transmitting the radiation through the material and forming a picture using fluoroscopic examination, with visual observation or video transmission of fluoroscopic images
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B42/00Obtaining records using waves other than optical waves; Visualisation of such records by using optical means
    • G03B42/02Obtaining records using waves other than optical waves; Visualisation of such records by using optical means using X-rays
    • G03B42/028Industrial applications
    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21KTECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/02Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
    • G21K1/04Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using variable diaphragms, shutters, choppers
    • G21K1/043Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using variable diaphragms, shutters, choppers changing time structure of beams by mechanical means, e.g. choppers, spinning filter wheels

Abstract

A pencil beam of X-rays scans an object along a line of direction before an X-ray detector to produce an image of the line along a picture tube. By relatively displacing the object scanned and the line of scan in a direction transverse to the line of scan, a sequence of lines appear on the display to produce an image of concealed objects, such as guns.

Description

United States Patent Stein et al.

[ Reissued Sept. 2, 1975 RADIANT ENERGY IMAGING WITH SCANNING PENCIL BEAM Inventors: Jay A. Stein, Newton; Roderick Swift, Belmont, both of Mass.

Assignee: American Science & Engineering,

Inc., Cambridge, Mass.

Filed: Aug. 2, 1974 Appl. No.: 493,868

Related U.S. Patent Documents Reissue of:

[64] Patent No.: 3,780,291

Issued: Dec. 18, 1973 Appl. No.: 160,363

Filed: July 7, 1971 [52] U.S. Cl ..250/369;250/358; 250/363 [51] Int. Cl. G01T 1/20 [58] Field of Search 250/358,363,359,360,

[56] References Cited UNITED STATES PATENTS Oldcndorf 250/360 3,146,349 8/1964 Jordan 250/391 3,151.245 9/1964 Wilson, Jr... 250/105 3,790,799 2/1974 Stein et al 250/363 FOREIGN PATENTS OR APPLICATIONS 519,594 10/1937 United Kingdom Primary Examiner-Davis L. Willis Attorney, Agent, or FirmCharles Hieken; Jerry Cohen [57] ABSTRACT A pencil beam of -X-rays scans an object along a line of direction before an X-ray detector to produce an image of the line along a picture tube. By relatively displacing the object scanned and the line of scan in a direction transverse to the line of scan, a sequence of lines appear on the display to produce an image of concealed objects, such as guns.

1 1 Claims, 2 Drawing Figures Reissued Sept. 2, 1975 Re. 28,544

INVENTORS JAY A. STEIN RODERICK SWIFT ATTORNEYS RADIANT ENERGY IMAGING WITH SCANNING PENCIL BEAM BACKGROUND OF THE INVENTION The present invention relates in general to radiant energy imaging and more particularly concerns novel apparatus and techniques for displaying a visual image of concealed objects with sufficient resolution to identity the object while keeping the intensity of radiation relatively low. The system is reliable, relatively economical and may be operated by relatively unskilled personnel.

The problem of detecting contraband concealed in packages and on persons is a serious one. Xray equipment is useful for assisting in the discovery of concealed contraband. Conventional Xray equipment is costly, requires operation by skilled personnel and may well subject personnel and parcels to undesired excessive dangerous radiation.

Accordingly, it is an important object of this invention to provide an Xray imaging system that overcomes one or more disadvantages of conventional systerns.

It is an important object of this invention to provide an Xray imaging system for displaying an image of concealed devices without exposing personnel or parcels to excessive radiation.

It is a further object of the invention to achieve one or more of the preceding objects with apparatus that is relatively inexpensive and capable of being operated by relatively unskilled personnel.

It is a further object of the invention to achieve one or more of the preceding objects with apparatus that operates reliably and is relatively easy to manufacture.

SUMMARY oF THE INVENTION According to the invention, there is means for scanning a radiation sensitive detector along a curve with a pencil beam of radiation to provide a line image signal characteristic of radiant energy response between the source of the pencil beam and the radiation sensitive detector, and means for displaying the image represented by the image signal. The radiation sensitive detector and the source are in fixed relationship. The detector may be positioned for receiving direct and/or reflected or scattered radiation. Preferably there is means for relatively displacing the curve scanned and an object to produce a sequence of image signals representative of the radiant energy response of the object in two dimensions. There is means for relatively displacing the region embracing the object and an assembly comprising the source and radiation sensitive detector or detecting means to establish relative translating motion in a direction transverse to a line joining the source and the detecting means. Preferably the curve is a line with the relative displacement between object and line being in a direction orthogonal to the line. Preferably the detector comprises a sodium iodide or cesium iodide crystal that produces a visible manifestation of the intensity of the incident radiation that may be sensed by a photodetector to provide a characteristic electrical output signal that may be applied to a television display system that may incorporate a storage tube.

Numerous other features, objects and advantages of the invention will become apparent from the following specification when read in connection with the accompanying drawing in which:

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a pictorial representation of a parcel inspection system according to the invention; and

FIG. 2 is a pictorial representation of an exemplary embodiment of the invention for inspecting personnel.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS With reference now to the drawing and more particularly FIG. 1 thereof, there is shown a pictorial representation of a system according to the invention for scanning parcels. A parcel 11 is scanned by the invention to produce an image 12 of contraband on the video storage and display unit 13. An Xray tube 14 provides a generally conical beam of X-rays 15 that are collimated into a fan beam 16 by slit collimator l7 oriented generally vertically as shown and incident upon the rotating collimation disc 18 formed with an array of peripheral radial slits, such as 21, for intercepting fan beam 16 to produce pencil beam 23. Pencil beam 23 scans parcel 11 and radiation sensitive detector 25 from top to bottom as rotating disc 18 rotates in the direction of arrow 24 to provide an image signal over output line 26 that is transmitted to video storage and display unit 13 to produce the image 12 of the parcel scanned as conveyor 27 carries parcel 11 in the direction of arrow 28 across the line being scanned.

Sincemost specific elements of the system are known to those skilled in the art who can practice the invention from an examination of FIG. 1 and the accompanying description, minute specific details are omitted so as to avoid obscuring the invention.

The geometry and timing of the system is arranged so that each slit 21 causes a new pencil beam to strike the top of detector 25 just after the previous pencil beam has swept past the bottom of the detector. That is to say, the height of fan beam 16 corresponds substantially to the separation between adjacent ones of slits 21 at substantially the maximum radial distance from the edge of disc 18 where the slits intercept fan beam 16. While FIG. 1 shows the elements that provide the scanning pencil beam source in exploded form to better illustrate the principles of the invention, the elements l4, l7 and 18 are preferably housed relatively close together in an enclosure that shields radiation so that the only significant radiant energy that escapes is that in pencil beam 23.

As parcel 1 1 move past the line being scanned, it differentially attenuates the X-rays in pencil beam 23 incident upon detector 25 so that the electrical signal provided on output line 26 is amplitude modulated in proportion to the instantaneous Xray flux incident upon it. This signal thus corresponds to a vertical line image of the transmissivity of parcel 11 and is analogous to one scan line of a television video signal. As parcel 11 moves horizontally past the line being scanned, sequential pencil beams intercept slightly displaced regions of parcel 11 so that the corresponding electrical signals from detector 25 may be appropriately displayed lineby-line to produce a two dimensional image of parcel 11 in X-rays analogous to the display of a picture on a television monitor as formed by line-by-line images. The output of detector 25 may thus be processed in accordance with the same storage and display techniques used in conventional video systems to store and display single raster images. Since these techniques are well known in the art, further discussion of them is unnecessary here.

Although detector 25 is shown behind the object being scanned for responding to the radiant energy transmitted through the object being scanned, it is within the principles of the invention to position the detector in the region between the radiant energy source and the object being scanned to respond to the scattered energy. This arrangement helps the apparatus detect concealed objects having different scattering characteristics from their surrounding. Moreover, a system according to the invention may include both detecting means before and behind the object being scanned for simultaneously providing signals representative of both radiant energy transmission and scattering. Appropriately combining such signals may help increase the ability of the system to detect a wide variety of concealed objects.

Referring to FIG. 2, there is shown a pictorial diagram illustrating the logical arrangement of a system according to the invention for personnel inspection. This system embodies the principles of the system of FIG. 1; however, the pencil beam scans horizontally, and the scanning system and person relatively move vertically to produce a two dimensional image of the person. Like elements in the system of FIG. 2 are designated by corresponding reference numerals.

A vertically movable platform 41 supports the pencil beam source comprising X-ray tube 14, fan beam collimator l7 and rotating collimation disc 18 to scan person 42 along a sequence of horizontal lines as detector 25 and platform 41 move down together. Detector 25 is also supported for vertical displacement.

Details of specific means for vertically displacing detector 25 and platform 41 are well within the skill of one having ordinary skill in this art and are omitted so as to avoid obscuring the principles of the invention. They might, for example, be guided by vertical shafts, at least one of which was a rotating feedscrew supporting detector 25 and platform 41 rotating in synchronism so that platform 41 and detector 25 move together. Numerous other techniques could be employed for effecting vertical scanning. For example, the person being scanned could be placed upon a platform that was raised and lowered. This approach would be especially convenient where a person entered the scanning area on one level and left it on another, an especially convenient arrangement, where, forexample, an airline passenger might enter at ground level and leave closer to boarding ramplevel. Video storage and display unit 13 then displays image 12 which, in this embodiment, is an image formed of a sequence of horizontal lines as distinguished from the sequence of vertical lines forming the image in FIG. 1.

Considering now specific parameters for a parcel examining system of FIG. 1, such a system could examine parcels with dimensions up to 32 X X 16 inches provided that parcels with dimensions exceeding 20 inches are oriented with their long axes parallel to their direc tion of travel and all parcels are guided close to detector 25 with a distance between source and detector of approximately 6 feet and the height of detector 25 about 24 inches. Then the maximum distortion caused by differences in magnification of the front and back surfaces of parcels will never exceed :L 19 percent from the average magnification and would occur only rarely. Objects with overall depths less than 20 inches along the direction of the scanning beam would have proportionately less distortion.

Resolution capabilities of l millimeter square are readily obtainable for identification of most objects having characteristic dimensions of several inches. With 1 mm resolution a 20 inch object could be covered in 500 scans without gaps or overlap, larger parcels being covered by more scans or greater spacing between scans. In either case the image could be displayed on a standard 5l2-line television monitor with negligible loss of detail.

For a nominal conveyor speed of 10 inch/second (250 mm/second), 250 scans/second (or 4 milliseconds/scan) achieves l millimeter resolution where each scan covers the full 24 inches height of the detector so that a 20-inch long parcel could be scanned in 2 seconds.

With X-ray tube 14 conventional and operating at moderate voltage and current (60l00 kv, l0 ma,) it typically produces a flux at 6 feet (the distance to detector 25) of millions of X-rays per mm per second. A filtered tungsten target tube operating at 100 kv and 15 ma provides typically an X-ray flux at detector 25 of about 10 X-rays/mm /sec. with a broad energy spectrum extending from 20 to 100 kev. Generating 250,000 resolution elements in 2 seconds results in each resolution element being irradiated for about 2/250,000 seconds or 8 microseconds. With an X-ray flux at the detector 25 of 10 X-ray min /second, each resolution element would (in the absence of an X-ray absorbing object) receive about X-rays per exposure. Taking into account the absorption by packing material of low energy X-rays, l0-20 X-rays/resolution element would typically be detected during a 2 second total exposure, about the statistically significant number of X-rays required to distinguish white from black in adjacent resolution elements so that the proposed 2-second exposure time is appropriate to achieve 1 X 1 mm resolution.

A feature of the invention is that the X-ray detection process is ideal. The X-ray quantum efficiency of the detector 25 is close to I00 percent. X-rays will produce output pulses several times larger than photomultiplier noise (dark) pulses so that the latter can be completely eliminated by threshold discrimination. Moreover, since the detector can be made very narrow, the background contribution from radiation scattered by a parcel is negligibly small so that the invention may use minimum X-ray dosage for 1 mm resolution, typically less than 0.003 mrads per image compared with the daily dosage received from cosmic rays and naturally occurring radio activity of about 0.3 mrads and to the dosage required to expose X-ray film to a barely detectable 0.01 density unit above background fog which requires at least 0.1 mrads. Thus, the invention may be safely used for inspecting personnel and parcels without using harmful radiation levels.

Preferably the X-ray tube and associated power supply are conventional. Preferably X-ray tube 14 is operable at variable voltages up to l50 kv to optimize image quality. Preferably X-ray tube 14 is operated water cooled with a peak voltage of 150 kv, peak current 5l0 ma, a 100 percent duty cycle, the power being at constant potential and the focal spot size of 0.4 mm, all these characteristics being readily available.

For the dimensions discussed above and a source spot size of 0.4 mm, a slit 21 width of 0.3 mm will provide 1 mm resolution. If disc 18 were moved closer to detector 25, a wider slit could be used, but the disc diameter would increase proportionately. Conversely, a smaller disc could be used if it were moved closer to X-ray tube 25, but the slit size would have to be reduced. A 2-foot diameter disc with 0.3 millimeter slits located midway between tube 14 and detector 25 is a satisfactory compromise between rotation of a larger disc at higher speeds and fabrication of smaller slits. The slits themselves are shaped to collimate the beam along all pencils comprising the fan and may be fabricated from tungsten inserts installed in the disc. The rate of rotation of disc 18 is related to the time available for a full exposure. For 500 scan lines in 2 seconds, disc 18 generating six scans per revolution rotates at 250/6 revolutions per second or 2,500 rpm, a rate readily achieved with standard motors.

A preferred form for detector 25 comprises a sodium iodide crystal that detects X-rays below 200 kev with 100 percent efficiency. Such a detector with dimensions l X l X 24 inches can be readily fabricated from two or three shorter pieces of standard material. The energy of each X-ray interacting in sodium iodide is converted to light sufficiently large to be easily detected by a photomultiplier. By optically coupling a 1 inch end window photomultiplier to each end of the sodium iodide crystal, there is complete and uniform light collection for X-ray interactions occurring at any position along the length of the detector. The summed currents from the two photomultipliers are proportional to the instantaneous X-ray flux striking the detector to produce an image signal analogous to an ordinary video signal that, after amplification, may be stored and displayed by techniques known in the art.

lt is preferred that the amplifier for the summed photomultiplier output currents have a bandwidth from d-c to about lMHz to retain all information in a 500 scan exposure that may be completely transparent (or opaque) to X-rays for one parcel and may contain structure at the limits of resolution (at 8 microseconds per resolution element) for another parcel, preferably being low noise so as to not limit system sensitivity and providing an output signal at high enough level to be stored. By utilizing as much amplification as practical I from the photomultiplier itself, many commercially available amplifiers, such as commonly available oscilloscope preamplifiers are adequate.

In an actual working embodiment of the invention, the X-ray image was reconstructed by employing 'suitably triggered time-base units to provide successive vertical sweeps, each slightly displaced from its neighcontinuously displayed television picture that is updated at every successive radar scan.-

The invention has numerous uses, including medical applications, and may take many different forms. For example, there may be a number of detectors and fan beams arranged for providing a multiplicity of scanning beams. Other techniques may be employed for providing the scanning beams of radiant energy and for detecting transmitted and/or scattered energy.

There has been described a novel radiant energy imaging system characterized by relatively high resolution, low radiation dosage, ease of operation and numerous other features. It is evident that those skilled in the art may now make numerous uses and modifications of and departures from the specific embodiments described herein without departing from the inventive concepts. Consequently, the invention is to be construed as embracing each and every novel feature and novel combination of features present in or possessed by the apparatus and techniques herein disclosed.

What is claimed is:

l. Radiant energy imaging apparatus comprising a source of a pencil beam of X-ray radiant energy radiant energy detecting means defining a curve in fixed relationship to said source,

means for scanning with said pencil beam said radiant energy detecting means along said curve to provide an image signal representative of the radiant energy response of the medium in a region traversed by said pencil beam along a path to said detecting means,

means for relatively displacing said region and an assembly comprising said source and said detecting means to establish relative translating motion in a direction transverse to a line joining said source andsaid detecting means to produce a sequence of image siganls representative of the radiant energy response of said region in two dimensions,

and means responsive to said image signals for producing an image representative of said response.

2. Radiant energy imaging apparatus in accordance with claim 1 wherein said radiant energy comprises X-rays.

3. Radiant energy imaging apparatus in accordance with claim 1 wherein said source of a pencil beam comprises,

a source of said radiant energy,

means for collimating said radiant energy into a slitlike beam,

and means defining an aperture for intercepting said slit-like beam to provide said pencil beam,

said means for scanning comprising means for relatively moving said aperture and said slit-like beam I to efiect said scanning.

4. Radiant energy imaging apparatus in accordance with claim 3 wherein said source of an uncollimated beam of said radiant energy comprises an X-ray tube,

said means for collimating comprises a plate of X-ray opaque material formed with a slit of xsray transparent material,

said means defining an aperture comprises a radial slit that is X-ray transparent in an X-ray opaque disc,

and said means for relatively moving comprises means for rotating said disc to move said radial slit along said first-mentioned slit.

5. Radiant energy imaging apparatus in accordance with claim [2] 1 wherein,

said detecting means comprises means for converting incident Xray energy into light energy,

and photodetecting means responsive to the latter light energy for providing an electrical image signal that is amplitude modulated in proportion to the instantaneous X-ray flux incident upon said detecting means.

6. Radiant energy imaging apparatus in accordance with claim 5 and further comprising a television display system responsive to said image signal for displaying a corresponding image.

7. Radiant energy imaging apparatus in accordance with claim 5 wherein said means is a crystal from the group consisting of sodium iodide and cesium iodide,

and said photodetecting means comprises photomultipliers at each end of said crystal means.

8. Radiant energy imaging apparatus in accordance with claim 6 and further comprising means for relatively displacing a region to be scanned and said curve to display a two-dimensional image of the X-ray response of said region being scanned.

9. Radiant energy imaging apparatus in accordance with claim 7 and further comprising means for rela tively displacing a region to be scanned and said curve to provide a two-dimensional image signal of the X-ray response of said region being scanned.

10. Radiant energy imaging apparatus in accordance with claim 1 wherein said radiant energy comprises X- rays.

said source of a pencil beam comprising,

a source of said radiant energy,

said radiant energy detecting means defining a line,

means including a plate of Xray opaque material formed with a linear slit of X-ray transparent material for collimating said radiant energy into a slitlike beam embracing a plane substantially including said slit and said straight line, an X-ray tube comprising a source of the uncollimated beam of said radiant energy,

an X-ray opaque disc formed with at least one radial slit that is X-ray transparent,

and means for rotatably supporting said disc with its plane generally perpendicular to the plane of said slit-like beam so that rotation of said disc causes said radial slit to transmit contiguous portions of said slit-like beam to said detecting means to effectively provide said pencil beam scanning said straight line from one end to the other.

11. Radiant energy imaging apparatus in accordance with claim 10 wherein said means for relatively displacing comprises means for translating an object to be imaged transverse to and across said plane substantially including said straight line and said slit-like beam.

12. Radiant energy imaging apparatus in accordance with claim 10 wherein said means for relatively displacing comprises means for moving said source and said detecting means together while said region remains sta tionary.

Claims (11)

1. Radiant energy imaging apparatus comprising a source of a pencil beam of X-ray radiant energy radiant energy detecting means defining a curve in fixed relationship to said source, means for scanning with said pencil beam said radiant energy detecting means along said curve to provide an image signal representative of the radiant energy response of the medium in a region traversed by said pencil beam along a path to said detecting means, means for relatively displacing said region and an assembly comprising said source and said detecting means to establish relative translating motion in a direction transverse to a line joining said source and said detecting means to produce a sequence of image siganls representative of the radiant energy response of said region in two dimensions, and means responsive to said image signals for producing an image representative of said response.
3. Radiant energy imaging apparatus in accordance with claim 1 wherein said source of a pencil beam comprises, a source of said radiant energy, means for collimating said radiant energy into a slit-like beam, and means defining an aperture for intercepting said slit-like beam to provide said pencil beam, said means for scanning comprising means for relatively moving said aperture and said slit-like beam to effect said scanning.
4. Radiant energy imaging apparatus in accordance with claim 3 wherein said source of an uncollimated beam of said radiant energy comprises an X-ray tube, said means for collimating comprises a plate of X-ray opaque material formed with a slit of X-ray transparent material, said means defining an aperture comprises a radial slit that is X-ray transparent in an X-ray opaque disc, and said means for relatively moving comprises means for rotating said disc to move said radial slit along said first-mentioned slit.
5. Radiant energy imaging apparatus in accordance with claim (2 ) 1 wherein, said detecting means comprises means for converting incident X-ray energy into light energy, and photodetecting means responsive to the latter light energy for providing an electrical image signal that is amplitude modulated in proportion to the instantaneous X-ray flux incident upon said detecting means.
6. Radiant energy imaging apparatus in accordance with claim 5 and further comprising a television display system responsive to said image signal for displaying a corresponding image.
7. Radiant energy imaging apparatus in accordance with claim 5 wherein said means is a crystal from the group consisting of sodium iodide and cesium iodide, and said photodetecting means comprises photomultipliers at each end of said crystal means.
8. Radiant energy imaging apparatus in accordance with claim 6 and further comprising means for relatively displacing a region to be scanned and said curve to display a two-dimensional image of the X-ray response of said region being scanned.
9. Radiant energy imaging apparatus in accordance with claim 7 and further comprising means for relatively displacing a region to be scanned and said curve to provide a two-dimensional image signal of the X-ray response of said region being scanned.
10. Radiant energy imaging apparatus in accordance with claim 1 wherein said radiant energy comprises X-rays, said source of a pencil beam comprising, a source of said radiant energy, said radiant energy detecting means defining a line, means including a plate of X-ray opaque material formed with a linear slit of X-ray transparent material for collimating said radiant energy into a slit-like beam embracing a plane substantially including said slit and said straight line, an X-ray tube comprising a source of the uncollimated beam of said radiant energy, an X-ray opaque disc formed with at least one radial slit that is X-ray transparent, and means for rotatably supporting said disc with its plane generally perpendicular to the plane of said slit-like beam so that rotation of said disc causes said radial slit to transmit contiguous portions of said slit-like beam to said detecting means to effectively provide said pencil beam scanning said straight line from one end to the other.
11. Radiant energy imaging apparatus in accordance with claim 10 wherein said means for relatively displacing comprises means for translating an object to be imaged transverse to and across said plane substantially including said straight line and said slit-like beam.
12. Radiant energy imaging apparatus in accordance with claim 10 wherein said means for relatively displacinG comprises means for moving said source and said detecting means together while said region remains stationary.
USRE28544E 1971-07-07 1974-08-02 Radiant energy imaging with scanning pencil beam Expired USRE28544E (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US16036371 true 1971-07-07 1971-07-07
USRE28544E USRE28544E (en) 1971-07-07 1974-08-02 Radiant energy imaging with scanning pencil beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
USRE28544E USRE28544E (en) 1971-07-07 1974-08-02 Radiant energy imaging with scanning pencil beam

Publications (1)

Publication Number Publication Date
USRE28544E true USRE28544E (en) 1975-09-02

Family

ID=26856830

Family Applications (1)

Application Number Title Priority Date Filing Date
USRE28544E Expired USRE28544E (en) 1971-07-07 1974-08-02 Radiant energy imaging with scanning pencil beam

Country Status (1)

Country Link
US (1) USRE28544E (en)

Cited By (84)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2720759A1 (en) * 1976-06-01 1977-12-08 Tekniska Roentgencentralen Ab beam apparatus for inspecting an article by
DE3719923A1 (en) * 1986-06-20 1987-12-23 American Science & Eng Inc Roentgenbilderzeuger, especially for materials with low atomic number
WO1988000698A1 (en) * 1986-07-22 1988-01-28 American Science And Engineering, Inc. Method and apparatus for producing tomographic images
US5033073A (en) * 1987-11-24 1991-07-16 Boeing Company System for radiograhically inspecting a relatively stationary object and related method
US5040199A (en) * 1986-07-14 1991-08-13 Hologic, Inc. Apparatus and method for analysis using x-rays
US5044002A (en) * 1986-07-14 1991-08-27 Hologic, Inc. Baggage inspection and the like
US5132995A (en) * 1989-03-07 1992-07-21 Hologic, Inc. X-ray analysis apparatus
US5148455A (en) * 1986-07-14 1992-09-15 Hologic, Inc. Bone densitometer
US5181234A (en) * 1990-08-06 1993-01-19 Irt Corporation X-ray backscatter detection system
US5260982A (en) * 1991-05-31 1993-11-09 Kabushiki Kaisha Toshiba Scattered radiation imaging apparatus
US5319547A (en) * 1990-08-10 1994-06-07 Vivid Technologies, Inc. Device and method for inspection of baggage and other objects
US5463224A (en) * 1986-07-01 1995-10-31 American Science And Engineering, Inc. X-ray detector suited for high energy applications with wide dynamic range, high stopping power and good protection for opto-electronic transducers
US5493596A (en) * 1993-11-03 1996-02-20 Annis; Martin High-energy X-ray inspection system
US5642394A (en) * 1996-04-03 1997-06-24 American Science And Engineering, Inc. Sidescatter X-ray detection system
US5764683A (en) * 1996-02-12 1998-06-09 American Science And Engineering, Inc. Mobile X-ray inspection system for large objects
US6269142B1 (en) 1999-08-11 2001-07-31 Steven W. Smith Interrupted-fan-beam imaging
US6344818B1 (en) * 1998-05-22 2002-02-05 Yuri Markov Apparatus and method for the detection of materials
US6473487B1 (en) 2000-12-27 2002-10-29 Rapiscan Security Products, Inc. Method and apparatus for physical characteristics discrimination of objects using a limited view three dimensional reconstruction
US20040017888A1 (en) * 2002-07-24 2004-01-29 Seppi Edward J. Radiation scanning of objects for contraband
US20040077849A1 (en) * 2002-10-16 2004-04-22 Orchid Chemicals & Pharmaceuticals Limited Process for the preparation of cefadroxil
US20050157842A1 (en) * 2002-07-23 2005-07-21 Neeraj Agrawal Single boom cargo scanning system
US20060023835A1 (en) * 2002-12-04 2006-02-02 Seppi Edward J Radiation scanning units with reduced detector requirements
US20060056584A1 (en) * 2002-07-23 2006-03-16 Bryan Allman Self-contained mobile inspection system and method
US7099434B2 (en) 2002-11-06 2006-08-29 American Science And Engineering, Inc. X-ray backscatter mobile inspection van
US20060245548A1 (en) * 2005-04-22 2006-11-02 Joseph Callerame X-ray backscatter inspection with coincident optical beam
USRE39396E1 (en) * 1996-02-12 2006-11-14 American Science And Engineering, Inc. Mobile x-ray inspection system for large objects
US7162005B2 (en) 2002-07-19 2007-01-09 Varian Medical Systems Technologies, Inc. Radiation sources and compact radiation scanning systems
US20070098142A1 (en) * 2005-10-24 2007-05-03 Peter Rothschild X-Ray Inspection Based on Scatter Detection
US20070217572A1 (en) * 2002-07-23 2007-09-20 Andreas Kotowski Single boom cargo scanning system
US20070269007A1 (en) * 2006-05-05 2007-11-22 Alan Akery Multiple pass cargo inspection system
US20070269005A1 (en) * 2002-11-06 2007-11-22 Alex Chalmers X-Ray Backscatter Detection Imaging Modules
US20080049899A1 (en) * 2006-08-23 2008-02-28 American Science And Engineering, Inc. Scatter Attenuation Tomography
US7356115B2 (en) 2002-12-04 2008-04-08 Varian Medical Systems Technology, Inc. Radiation scanning units including a movable platform
US20080253514A1 (en) * 2005-02-25 2008-10-16 Rapiscan Systems Limited X-Ray Security Inspection Machine
US20090010386A1 (en) * 2003-09-15 2009-01-08 Peschmann Kristian R Methods and Systems for Rapid Detection of Concealed Objects Using Fluorescence
US20090103686A1 (en) * 2007-10-23 2009-04-23 American Science And Engineering, Inc. X-Ray Imaging with Continuously Variable Zoom and Lateral Relative Displacement of the Source
US20090116614A1 (en) * 2002-07-23 2009-05-07 Andreas Kotowski Cargo Scanning System
US20090141860A1 (en) * 2007-11-01 2009-06-04 Peter Ryge Multiple Screen Detection Systems
US20090161825A1 (en) * 2003-06-20 2009-06-25 James Carver Relocatable X-Ray Imaging System and Method for Inspecting Commercial Vehicles and Cargo Containers
US20090257555A1 (en) * 2002-11-06 2009-10-15 American Science And Engineering, Inc. X-Ray Inspection Trailer
US20100034347A1 (en) * 2006-08-23 2010-02-11 American Science And Engineering, Inc. Scatter Attenuation Tomography
US20100034353A1 (en) * 2008-08-11 2010-02-11 Kravis Scott D Scanning X-ray inspection system using scintillation detection with simultaneous counting and integrating modes
US20100085066A1 (en) * 2003-09-15 2010-04-08 Peschmann Kristian R Methods and systems for the rapid detection of concealed objects
US20100189226A1 (en) * 2002-07-23 2010-07-29 Andreas Kotowski Rotatable boom cargo scanning system
US7796733B2 (en) 2007-02-01 2010-09-14 Rapiscan Systems, Inc. Personnel security screening system with enhanced privacy
US7826589B2 (en) 2007-12-25 2010-11-02 Rapiscan Systems, Inc. Security system for screening people
US20110004002A1 (en) * 2008-02-29 2011-01-06 Basf Se Process for preparing alkyl 2-alkoxymethylene-4,4-difluoro-3-oxobutyrates
US20110038453A1 (en) * 2002-07-23 2011-02-17 Edward James Morton Compact Mobile Cargo Scanning System
US20110064192A1 (en) * 2002-07-23 2011-03-17 Edward James Morton Four Sided Imaging System and Method for Detection of Contraband
US7929664B2 (en) 2007-02-13 2011-04-19 Sentinel Scanning Corporation CT scanning and contraband detection
US20110098870A1 (en) * 2008-02-28 2011-04-28 Edward James Morton Mobile Scanning Systems
US20110116600A1 (en) * 2008-02-28 2011-05-19 Edward James Morton Scanning Systems
US20110116599A1 (en) * 2008-02-28 2011-05-19 Rapiscan Security Products, Inc. Scanning Systems
US20110135060A1 (en) * 2008-05-20 2011-06-09 Edward James Morton High Energy X-Ray Inspection System Using a Fan-Shaped Beam and Collimated Backscatter Detectors
US20110142203A1 (en) * 2008-05-20 2011-06-16 Edward James Morton Gantry Scanner Systems
US8199996B2 (en) 2007-06-21 2012-06-12 Rapiscan Systems, Inc. Systems and methods for improving directed people screening
US8213570B2 (en) 2006-02-27 2012-07-03 Rapiscan Systems, Inc. X-ray security inspection machine
US8340245B2 (en) 2009-06-05 2012-12-25 Sentinel Scanning Corporation Transportation container inspection system and method
US8345819B2 (en) 2009-07-29 2013-01-01 American Science And Engineering, Inc. Top-down X-ray inspection trailer
US8389942B2 (en) 2008-06-11 2013-03-05 Rapiscan Systems, Inc. Photomultiplier and detection systems
US8532823B2 (en) 2010-02-12 2013-09-10 American Science And Engineering, Inc. Disruptor guidance system and methods based on scatter imaging
US8576989B2 (en) 2010-03-14 2013-11-05 Rapiscan Systems, Inc. Beam forming apparatus
US8576982B2 (en) 2008-02-01 2013-11-05 Rapiscan Systems, Inc. Personnel screening system
US8654922B2 (en) 2009-11-18 2014-02-18 Rapiscan Systems, Inc. X-ray-based system and methods for inspecting a person's shoes for aviation security threats
WO2014096705A1 (en) 2012-12-20 2014-06-26 Commissariat A L'energie Atomique Et Aux Energies Alternatives Scanning illuminating device, imaging device comprising same and method of implementation
US8824632B2 (en) 2009-07-29 2014-09-02 American Science And Engineering, Inc. Backscatter X-ray inspection van with top-down imaging
US8837669B2 (en) 2003-04-25 2014-09-16 Rapiscan Systems, Inc. X-ray scanning system
US8840303B2 (en) 2008-05-20 2014-09-23 Rapiscan Systems, Inc. Scanner systems
US8842808B2 (en) 2006-08-11 2014-09-23 American Science And Engineering, Inc. Scatter attenuation tomography using a monochromatic radiation source
US8885794B2 (en) 2003-04-25 2014-11-11 Rapiscan Systems, Inc. X-ray tomographic inspection system for the identification of specific target items
US8963094B2 (en) 2008-06-11 2015-02-24 Rapiscan Systems, Inc. Composite gamma-neutron detection system
US8971485B2 (en) 2008-02-28 2015-03-03 Rapiscan Systems, Inc. Drive-through scanning systems
US8995619B2 (en) 2010-03-14 2015-03-31 Rapiscan Systems, Inc. Personnel screening system
US9020095B2 (en) 2003-04-25 2015-04-28 Rapiscan Systems, Inc. X-ray scanners
US9036779B2 (en) 2008-02-28 2015-05-19 Rapiscan Systems, Inc. Dual mode X-ray vehicle scanning system
US9048061B2 (en) 2005-12-16 2015-06-02 Rapiscan Systems, Inc. X-ray scanners and X-ray sources therefor
US9057679B2 (en) 2012-02-03 2015-06-16 Rapiscan Systems, Inc. Combined scatter and transmission multi-view imaging system
US9113839B2 (en) 2003-04-25 2015-08-25 Rapiscon Systems, Inc. X-ray inspection system and method
US9218933B2 (en) 2011-06-09 2015-12-22 Rapidscan Systems, Inc. Low-dose radiographic imaging system
US9223050B2 (en) 2005-04-15 2015-12-29 Rapiscan Systems, Inc. X-ray imaging system having improved mobility
US9285325B2 (en) 2007-02-01 2016-03-15 Rapiscan Systems, Inc. Personnel screening system
US9310323B2 (en) 2009-05-16 2016-04-12 Rapiscan Systems, Inc. Systems and methods for high-Z threat alarm resolution
US9791590B2 (en) 2013-01-31 2017-10-17 Rapiscan Systems, Inc. Portable security inspection system
US9823383B2 (en) 2013-01-07 2017-11-21 Rapiscan Systems, Inc. X-ray scanner with partial energy discriminating detector array

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB519594A (en) * 1937-10-01 1940-04-01 Electrical Res Prod Inc Improvements in or relating to television image transmission systems
US3106640A (en) * 1960-10-06 1963-10-08 William H Oldendorf Radiant energy apparatus for investigating selected areas of the interior of objectsobscured by dense material
US3146349A (en) * 1961-12-01 1964-08-25 Edward D Jordan Detecting hidden explosives using neutron beams
US3151245A (en) * 1961-11-21 1964-09-29 High Voltage Engineering Corp X-ray beam collimating apparatus
US3790799A (en) * 1972-06-21 1974-02-05 American Science & Eng Inc Radiant energy imaging with rocking scanning

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB519594A (en) * 1937-10-01 1940-04-01 Electrical Res Prod Inc Improvements in or relating to television image transmission systems
US3106640A (en) * 1960-10-06 1963-10-08 William H Oldendorf Radiant energy apparatus for investigating selected areas of the interior of objectsobscured by dense material
US3151245A (en) * 1961-11-21 1964-09-29 High Voltage Engineering Corp X-ray beam collimating apparatus
US3146349A (en) * 1961-12-01 1964-08-25 Edward D Jordan Detecting hidden explosives using neutron beams
US3790799A (en) * 1972-06-21 1974-02-05 American Science & Eng Inc Radiant energy imaging with rocking scanning

Cited By (182)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2720759A1 (en) * 1976-06-01 1977-12-08 Tekniska Roentgencentralen Ab beam apparatus for inspecting an article by
DE3719923A1 (en) * 1986-06-20 1987-12-23 American Science & Eng Inc Roentgenbilderzeuger, especially for materials with low atomic number
DE3719923C2 (en) * 1986-06-20 1998-07-02 American Science & Eng Inc An image forming device, especially for materials with low atomic number
US5463224A (en) * 1986-07-01 1995-10-31 American Science And Engineering, Inc. X-ray detector suited for high energy applications with wide dynamic range, high stopping power and good protection for opto-electronic transducers
US5040199A (en) * 1986-07-14 1991-08-13 Hologic, Inc. Apparatus and method for analysis using x-rays
US5148455A (en) * 1986-07-14 1992-09-15 Hologic, Inc. Bone densitometer
US5044002A (en) * 1986-07-14 1991-08-27 Hologic, Inc. Baggage inspection and the like
WO1988000698A1 (en) * 1986-07-22 1988-01-28 American Science And Engineering, Inc. Method and apparatus for producing tomographic images
US5033073A (en) * 1987-11-24 1991-07-16 Boeing Company System for radiograhically inspecting a relatively stationary object and related method
US5132995A (en) * 1989-03-07 1992-07-21 Hologic, Inc. X-ray analysis apparatus
US5181234A (en) * 1990-08-06 1993-01-19 Irt Corporation X-ray backscatter detection system
US5838758A (en) * 1990-08-10 1998-11-17 Vivid Technologies Device and method for inspection of baggage and other objects
US5319547A (en) * 1990-08-10 1994-06-07 Vivid Technologies, Inc. Device and method for inspection of baggage and other objects
US5490218A (en) * 1990-08-10 1996-02-06 Vivid Technologies, Inc. Device and method for inspection of baggage and other objects
US5260982A (en) * 1991-05-31 1993-11-09 Kabushiki Kaisha Toshiba Scattered radiation imaging apparatus
US5493596A (en) * 1993-11-03 1996-02-20 Annis; Martin High-energy X-ray inspection system
US5764683A (en) * 1996-02-12 1998-06-09 American Science And Engineering, Inc. Mobile X-ray inspection system for large objects
US6252929B1 (en) 1996-02-12 2001-06-26 American Science & Engineering, Inc. Mobile x-ray inspection system for large objects
USRE39396E1 (en) * 1996-02-12 2006-11-14 American Science And Engineering, Inc. Mobile x-ray inspection system for large objects
US6292533B1 (en) 1996-02-12 2001-09-18 American Science & Engineering, Inc. Mobile X-ray inspection system for large objects
US5642394A (en) * 1996-04-03 1997-06-24 American Science And Engineering, Inc. Sidescatter X-ray detection system
US6344818B1 (en) * 1998-05-22 2002-02-05 Yuri Markov Apparatus and method for the detection of materials
US6269142B1 (en) 1999-08-11 2001-07-31 Steven W. Smith Interrupted-fan-beam imaging
US6473487B1 (en) 2000-12-27 2002-10-29 Rapiscan Security Products, Inc. Method and apparatus for physical characteristics discrimination of objects using a limited view three dimensional reconstruction
US7162005B2 (en) 2002-07-19 2007-01-09 Varian Medical Systems Technologies, Inc. Radiation sources and compact radiation scanning systems
US8929509B2 (en) 2002-07-23 2015-01-06 Rapiscan Systems, Inc. Four-sided imaging system and method for detection of contraband
US9020096B2 (en) 2002-07-23 2015-04-28 Rapiscan Systems, Inc. Self contained mobile inspection system and method
US20060056584A1 (en) * 2002-07-23 2006-03-16 Bryan Allman Self-contained mobile inspection system and method
US8503605B2 (en) 2002-07-23 2013-08-06 Rapiscan Systems, Inc. Four sided imaging system and method for detection of contraband
US8491189B2 (en) 2002-07-23 2013-07-23 Rapiscan Systems, Inc. Radiation source apparatus
US9025731B2 (en) 2002-07-23 2015-05-05 Rapiscan Systems, Inc. Cargo scanning system
US20050157842A1 (en) * 2002-07-23 2005-07-21 Neeraj Agrawal Single boom cargo scanning system
US8385501B2 (en) 2002-07-23 2013-02-26 Rapiscan Systems, Inc. Self contained mobile inspection system and method
US8668386B2 (en) 2002-07-23 2014-03-11 Rapiscan Systems, Inc. Compact mobile cargo scanning system
US8356937B2 (en) 2002-07-23 2013-01-22 Rapiscan Systems, Inc. Rotatable boom cargo scanning system
US9052403B2 (en) 2002-07-23 2015-06-09 Rapiscan Systems, Inc. Compact mobile cargo scanning system
US20070217572A1 (en) * 2002-07-23 2007-09-20 Andreas Kotowski Single boom cargo scanning system
US8275091B2 (en) 2002-07-23 2012-09-25 Rapiscan Systems, Inc. Compact mobile cargo scanning system
US8059781B2 (en) 2002-07-23 2011-11-15 Rapiscan Systems, Inc. Cargo scanning system
US7322745B2 (en) 2002-07-23 2008-01-29 Rapiscan Security Products, Inc. Single boom cargo scanning system
US7995705B2 (en) 2002-07-23 2011-08-09 Rapiscan Security Products, Inc. Self-contained mobile inspection system and method
US20080075232A1 (en) * 2002-07-23 2008-03-27 Neeraj Agrawal Cargo Scanning System
US7963695B2 (en) 2002-07-23 2011-06-21 Rapiscan Systems, Inc. Rotatable boom cargo scanning system
US9223049B2 (en) 2002-07-23 2015-12-29 Rapiscan Systems, Inc. Cargo scanning system with boom structure
US7369643B2 (en) 2002-07-23 2008-05-06 Rapiscan Security Products, Inc. Single boom cargo scanning system
US20080165926A1 (en) * 2002-07-23 2008-07-10 Andreas Kotowski Single Boom Cargo Scanning System
US20110116597A1 (en) * 2002-07-23 2011-05-19 Neeraj Agrawal Cargo Scanning System
US20090274270A1 (en) * 2002-07-23 2009-11-05 Andreas Kotowski Single Boom Cargo Scanning System
US7486768B2 (en) 2002-07-23 2009-02-03 Rapiscan Security Products, Inc. Self-contained mobile inspection system and method
US20110064192A1 (en) * 2002-07-23 2011-03-17 Edward James Morton Four Sided Imaging System and Method for Detection of Contraband
US7519148B2 (en) 2002-07-23 2009-04-14 Rapiscan Security Products, Inc. Single boom cargo scanning system
US7517149B2 (en) 2002-07-23 2009-04-14 Rapiscan Security Products, Inc. Cargo scanning system
US20110038453A1 (en) * 2002-07-23 2011-02-17 Edward James Morton Compact Mobile Cargo Scanning System
US7876880B2 (en) 2002-07-23 2011-01-25 Rapiscan Systems, Inc. Single boom cargo scanning system
US20090245462A1 (en) * 2002-07-23 2009-10-01 Neeraj Agrawal Cargo Scanning System
US7817776B2 (en) 2002-07-23 2010-10-19 Rapiscan Systems, Inc. Cargo scanning system
US7783004B2 (en) 2002-07-23 2010-08-24 Rapiscan Systems, Inc. Cargo scanning system
US20100189226A1 (en) * 2002-07-23 2010-07-29 Andreas Kotowski Rotatable boom cargo scanning system
US7720195B2 (en) 2002-07-23 2010-05-18 Rapiscan Security Products, Inc. Self-contained mobile inspection system and method
US20090202037A1 (en) * 2002-07-23 2009-08-13 Bryan Allman Self-Contained Mobile Inspection System and Method
US20110033027A1 (en) * 2002-07-23 2011-02-10 Bryan Allman Self-Contained Mobile Inspection System and Method
US20090116614A1 (en) * 2002-07-23 2009-05-07 Andreas Kotowski Cargo Scanning System
US8687765B2 (en) 2002-07-23 2014-04-01 Rapiscan Systems, Inc. Cargo scanning system with boom structure
US7369640B2 (en) 2002-07-24 2008-05-06 Varian Medical Systems Technologies, Inc. Radiation scanning of objects for contraband
US20040017888A1 (en) * 2002-07-24 2004-01-29 Seppi Edward J. Radiation scanning of objects for contraband
US20070003003A1 (en) * 2002-07-24 2007-01-04 Seppi Edward J Radiation scanning of objects for contraband
US7103137B2 (en) 2002-07-24 2006-09-05 Varian Medical Systems Technology, Inc. Radiation scanning of objects for contraband
US8000436B2 (en) 2002-07-24 2011-08-16 Varian Medical Systems, Inc. Radiation scanning units including a movable platform
US7672422B2 (en) 2002-07-24 2010-03-02 Varian Medical Systems, Inc. Radiation scanning of objects for contraband
US20040077849A1 (en) * 2002-10-16 2004-04-22 Orchid Chemicals & Pharmaceuticals Limited Process for the preparation of cefadroxil
US8194822B2 (en) 2002-11-06 2012-06-05 American Science And Engineering, Inc. X-ray inspection based on scatter detection
US20090257555A1 (en) * 2002-11-06 2009-10-15 American Science And Engineering, Inc. X-Ray Inspection Trailer
US7099434B2 (en) 2002-11-06 2006-08-29 American Science And Engineering, Inc. X-ray backscatter mobile inspection van
US7505556B2 (en) 2002-11-06 2009-03-17 American Science And Engineering, Inc. X-ray backscatter detection imaging modules
US7218704B1 (en) 2002-11-06 2007-05-15 American Science And Engineering, Inc. X-ray backscatter mobile inspection van
US20110075808A1 (en) * 2002-11-06 2011-03-31 American Science And Engineering, Inc. X-Ray Inspection Based on Scatter Detection
US20070269005A1 (en) * 2002-11-06 2007-11-22 Alex Chalmers X-Ray Backscatter Detection Imaging Modules
US7356115B2 (en) 2002-12-04 2008-04-08 Varian Medical Systems Technology, Inc. Radiation scanning units including a movable platform
US20060023835A1 (en) * 2002-12-04 2006-02-02 Seppi Edward J Radiation scanning units with reduced detector requirements
US7672426B2 (en) 2002-12-04 2010-03-02 Varian Medical Systems, Inc. Radiation scanning units with reduced detector requirements
US9020095B2 (en) 2003-04-25 2015-04-28 Rapiscan Systems, Inc. X-ray scanners
US9113839B2 (en) 2003-04-25 2015-08-25 Rapiscon Systems, Inc. X-ray inspection system and method
US9442082B2 (en) 2003-04-25 2016-09-13 Rapiscan Systems, Inc. X-ray inspection system and method
US9675306B2 (en) 2003-04-25 2017-06-13 Rapiscan Systems, Inc. X-ray scanning system
US8885794B2 (en) 2003-04-25 2014-11-11 Rapiscan Systems, Inc. X-ray tomographic inspection system for the identification of specific target items
US9618648B2 (en) 2003-04-25 2017-04-11 Rapiscan Systems, Inc. X-ray scanners
US8837669B2 (en) 2003-04-25 2014-09-16 Rapiscan Systems, Inc. X-ray scanning system
US7769133B2 (en) 2003-06-20 2010-08-03 Rapiscan Systems, Inc. Relocatable X-ray imaging system and method for inspecting commercial vehicles and cargo containers
US9285498B2 (en) 2003-06-20 2016-03-15 Rapiscan Systems, Inc. Relocatable X-ray imaging system and method for inspecting commercial vehicles and cargo containers
US7991113B2 (en) 2003-06-20 2011-08-02 Rapiscan Security Products, Inc. Relocatable x-ray imaging system and method for inspecting commercial vehicles and cargo containers
US20090161825A1 (en) * 2003-06-20 2009-06-25 James Carver Relocatable X-Ray Imaging System and Method for Inspecting Commercial Vehicles and Cargo Containers
US9042511B2 (en) 2003-08-08 2015-05-26 Rapiscan Systems, Inc. Methods and systems for the rapid detection of concealed objects
US20110228896A1 (en) * 2003-09-15 2011-09-22 Peschmann Kristian R Methods and Systems for Rapid Detection of Concealed Objects Using Fluorescence
US20090010386A1 (en) * 2003-09-15 2009-01-08 Peschmann Kristian R Methods and Systems for Rapid Detection of Concealed Objects Using Fluorescence
US8428217B2 (en) 2003-09-15 2013-04-23 Rapiscan Systems, Inc. Methods and systems for rapid detection of concealed objects
US9268058B2 (en) 2003-09-15 2016-02-23 Rapiscan Systems, Inc. Methods and systems for the rapid detection of concealed objects
US7856081B2 (en) 2003-09-15 2010-12-21 Rapiscan Systems, Inc. Methods and systems for rapid detection of concealed objects using fluorescence
US8674706B2 (en) 2003-09-15 2014-03-18 Rapiscan Systems, Inc. Methods and systems for the rapid detection of concealed objects
US8138770B2 (en) 2003-09-15 2012-03-20 Rapiscan Systems, Inc. Methods and systems for the rapid detection of concealed objects
US20100085066A1 (en) * 2003-09-15 2010-04-08 Peschmann Kristian R Methods and systems for the rapid detection of concealed objects
US20080253514A1 (en) * 2005-02-25 2008-10-16 Rapiscan Systems Limited X-Ray Security Inspection Machine
US7702069B2 (en) 2005-02-25 2010-04-20 Rapiscan Security Products, Inc. X-ray security inspection machine
US9223050B2 (en) 2005-04-15 2015-12-29 Rapiscan Systems, Inc. X-ray imaging system having improved mobility
US20060245548A1 (en) * 2005-04-22 2006-11-02 Joseph Callerame X-ray backscatter inspection with coincident optical beam
US20070098142A1 (en) * 2005-10-24 2007-05-03 Peter Rothschild X-Ray Inspection Based on Scatter Detection
US7551715B2 (en) 2005-10-24 2009-06-23 American Science And Engineering, Inc. X-ray inspection based on scatter detection
US9638646B2 (en) 2005-12-16 2017-05-02 Rapiscan Systems, Inc. X-ray scanners and X-ray sources therefor
US9048061B2 (en) 2005-12-16 2015-06-02 Rapiscan Systems, Inc. X-ray scanners and X-ray sources therefor
US9310322B2 (en) 2006-02-27 2016-04-12 Rapiscan Systems, Inc. X-ray security inspection machine
US8213570B2 (en) 2006-02-27 2012-07-03 Rapiscan Systems, Inc. X-ray security inspection machine
US20090238336A1 (en) * 2006-05-05 2009-09-24 Alan Akery Multiple Pass Cargo Inspection System
US20110127426A1 (en) * 2006-05-05 2011-06-02 Alan Akery Multiple Pass Cargo Inspection System
US8170177B2 (en) 2006-05-05 2012-05-01 Rapiscan Systems, Inc. Multiple pass cargo inspection system
US7860213B2 (en) 2006-05-05 2010-12-28 Rapiscan Systems, Inc. Multiple pass cargo inspection system
US8837670B2 (en) 2006-05-05 2014-09-16 Rapiscan Systems, Inc. Cargo inspection system
US7526064B2 (en) 2006-05-05 2009-04-28 Rapiscan Security Products, Inc. Multiple pass cargo inspection system
US8457275B2 (en) 2006-05-05 2013-06-04 Rapiscan Systems, Inc. Multiple pass cargo inspection system
US20070269007A1 (en) * 2006-05-05 2007-11-22 Alan Akery Multiple pass cargo inspection system
US9279901B2 (en) 2006-05-05 2016-03-08 Rapiscan Systems, Inc. Cargo inspection system
US8842808B2 (en) 2006-08-11 2014-09-23 American Science And Engineering, Inc. Scatter attenuation tomography using a monochromatic radiation source
US20100034347A1 (en) * 2006-08-23 2010-02-11 American Science And Engineering, Inc. Scatter Attenuation Tomography
US7924979B2 (en) 2006-08-23 2011-04-12 American Science And Engineering, Inc. Scatter attenuation tomography
US20080049899A1 (en) * 2006-08-23 2008-02-28 American Science And Engineering, Inc. Scatter Attenuation Tomography
US7551718B2 (en) 2006-08-23 2009-06-23 American Science And Engineering, Inc. Scatter attenuation tomography
US9182516B2 (en) 2007-02-01 2015-11-10 Rapiscan Systems, Inc. Personnel screening system
US7796733B2 (en) 2007-02-01 2010-09-14 Rapiscan Systems, Inc. Personnel security screening system with enhanced privacy
US9285325B2 (en) 2007-02-01 2016-03-15 Rapiscan Systems, Inc. Personnel screening system
US9291741B2 (en) 2007-02-01 2016-03-22 Rapiscan Systems, Inc. Personnel screening system
US20110081099A1 (en) * 2007-02-01 2011-04-07 Hughes Ronald J Personnel Security Screening System with Enhanced Privacy
US8135112B2 (en) 2007-02-01 2012-03-13 Rapiscan Systems, Inc. Personnel security screening system with enhanced privacy
US7929664B2 (en) 2007-02-13 2011-04-19 Sentinel Scanning Corporation CT scanning and contraband detection
US8254517B2 (en) 2007-02-13 2012-08-28 Sentinel Scanning Corporation CT scanning and contraband detection
US8199996B2 (en) 2007-06-21 2012-06-12 Rapiscan Systems, Inc. Systems and methods for improving directed people screening
US8774362B2 (en) 2007-06-21 2014-07-08 Rapiscan Systems, Inc. Systems and methods for improving directed people screening
US20090103686A1 (en) * 2007-10-23 2009-04-23 American Science And Engineering, Inc. X-Ray Imaging with Continuously Variable Zoom and Lateral Relative Displacement of the Source
US7593510B2 (en) 2007-10-23 2009-09-22 American Science And Engineering, Inc. X-ray imaging with continuously variable zoom and lateral relative displacement of the source
US8401147B2 (en) 2007-11-01 2013-03-19 Rapiscan Systems, Inc. Multiple screen detection systems
US8003949B2 (en) 2007-11-01 2011-08-23 Rapiscan Systems, Inc. Multiple screen detection systems
US20090141860A1 (en) * 2007-11-01 2009-06-04 Peter Ryge Multiple Screen Detection Systems
US8148693B2 (en) 2007-11-01 2012-04-03 Rapiscan Systems, Inc. Multiple screen detection systems
US7826589B2 (en) 2007-12-25 2010-11-02 Rapiscan Systems, Inc. Security system for screening people
US8576982B2 (en) 2008-02-01 2013-11-05 Rapiscan Systems, Inc. Personnel screening system
US20110116600A1 (en) * 2008-02-28 2011-05-19 Edward James Morton Scanning Systems
US20110098870A1 (en) * 2008-02-28 2011-04-28 Edward James Morton Mobile Scanning Systems
US8644453B2 (en) 2008-02-28 2014-02-04 Rapiscan Systems, Inc. Scanning systems
US9429530B2 (en) 2008-02-28 2016-08-30 Rapiscan Systems, Inc. Scanning systems
US9158027B2 (en) 2008-02-28 2015-10-13 Rapiscan Systems, Inc. Mobile scanning systems
US8971485B2 (en) 2008-02-28 2015-03-03 Rapiscan Systems, Inc. Drive-through scanning systems
US9121958B2 (en) 2008-02-28 2015-09-01 Rapiscan Systems, Inc. Scanning systems
US8774357B2 (en) 2008-02-28 2014-07-08 Rapiscan Systems, Inc. Scanning systems
US9036779B2 (en) 2008-02-28 2015-05-19 Rapiscan Systems, Inc. Dual mode X-ray vehicle scanning system
US8433036B2 (en) 2008-02-28 2013-04-30 Rapiscan Systems, Inc. Scanning systems
US20110116599A1 (en) * 2008-02-28 2011-05-19 Rapiscan Security Products, Inc. Scanning Systems
US20110004002A1 (en) * 2008-02-29 2011-01-06 Basf Se Process for preparing alkyl 2-alkoxymethylene-4,4-difluoro-3-oxobutyrates
US20110142203A1 (en) * 2008-05-20 2011-06-16 Edward James Morton Gantry Scanner Systems
US8831176B2 (en) 2008-05-20 2014-09-09 Rapiscan Systems, Inc. High energy X-ray inspection system using a fan-shaped beam and collimated backscatter detectors
US9332624B2 (en) 2008-05-20 2016-05-03 Rapiscan Systems, Inc. Gantry scanner systems
US20110135060A1 (en) * 2008-05-20 2011-06-09 Edward James Morton High Energy X-Ray Inspection System Using a Fan-Shaped Beam and Collimated Backscatter Detectors
US8840303B2 (en) 2008-05-20 2014-09-23 Rapiscan Systems, Inc. Scanner systems
US8579506B2 (en) 2008-05-20 2013-11-12 Rapiscan Systems, Inc. Gantry scanner systems
US8389941B2 (en) 2008-06-11 2013-03-05 Rapiscan Systems, Inc. Composite gamma-neutron detection system
US9329285B2 (en) 2008-06-11 2016-05-03 Rapiscan Systems, Inc. Composite gamma-neutron detection system
US8735833B2 (en) 2008-06-11 2014-05-27 Rapiscan Systems, Inc Photomultiplier and detection systems
US8389942B2 (en) 2008-06-11 2013-03-05 Rapiscan Systems, Inc. Photomultiplier and detection systems
US8993970B2 (en) 2008-06-11 2015-03-31 Rapiscan Systems, Inc. Photomultiplier and detection systems
US8963094B2 (en) 2008-06-11 2015-02-24 Rapiscan Systems, Inc. Composite gamma-neutron detection system
US7965816B2 (en) 2008-08-11 2011-06-21 Control Screening, LLC. Scanning X-ray inspection system using scintillation detection with simultaneous counting and integrating modes
US20100034353A1 (en) * 2008-08-11 2010-02-11 Kravis Scott D Scanning X-ray inspection system using scintillation detection with simultaneous counting and integrating modes
US9310323B2 (en) 2009-05-16 2016-04-12 Rapiscan Systems, Inc. Systems and methods for high-Z threat alarm resolution
US8340245B2 (en) 2009-06-05 2012-12-25 Sentinel Scanning Corporation Transportation container inspection system and method
US8824632B2 (en) 2009-07-29 2014-09-02 American Science And Engineering, Inc. Backscatter X-ray inspection van with top-down imaging
US8345819B2 (en) 2009-07-29 2013-01-01 American Science And Engineering, Inc. Top-down X-ray inspection trailer
US8654922B2 (en) 2009-11-18 2014-02-18 Rapiscan Systems, Inc. X-ray-based system and methods for inspecting a person's shoes for aviation security threats
US8532823B2 (en) 2010-02-12 2013-09-10 American Science And Engineering, Inc. Disruptor guidance system and methods based on scatter imaging
US8995619B2 (en) 2010-03-14 2015-03-31 Rapiscan Systems, Inc. Personnel screening system
US8576989B2 (en) 2010-03-14 2013-11-05 Rapiscan Systems, Inc. Beam forming apparatus
US9058909B2 (en) 2010-03-14 2015-06-16 Rapiscan Systems, Inc. Beam forming apparatus
US9218933B2 (en) 2011-06-09 2015-12-22 Rapidscan Systems, Inc. Low-dose radiographic imaging system
US9057679B2 (en) 2012-02-03 2015-06-16 Rapiscan Systems, Inc. Combined scatter and transmission multi-view imaging system
WO2014096705A1 (en) 2012-12-20 2014-06-26 Commissariat A L'energie Atomique Et Aux Energies Alternatives Scanning illuminating device, imaging device comprising same and method of implementation
US9823383B2 (en) 2013-01-07 2017-11-21 Rapiscan Systems, Inc. X-ray scanner with partial energy discriminating detector array
US9791590B2 (en) 2013-01-31 2017-10-17 Rapiscan Systems, Inc. Portable security inspection system

Similar Documents

Publication Publication Date Title
US3432660A (en) Gamma-ray camera for imaging radioisotope distribution in a transverse section of a rotating subject
US3101407A (en) Fluoroscope system utilizing an image storage tube
US3978337A (en) Three-dimensional time-of-flight gamma camera system
US4057725A (en) Device for measuring local radiation absorption in a body
US5051591A (en) Reflective chopper for infrared imaging systems
US5519222A (en) 90 degree parallel path collimators for three head spect cameras
US5493596A (en) High-energy X-ray inspection system
US5874744A (en) Process and apparatus for retrieving information from a storage phosphor screen
US6856667B2 (en) X-ray inspection system
US6424695B1 (en) Separate lateral processing of backscatter signals
US4095107A (en) Transaxial radionuclide emission camera apparatus and method
US4433427A (en) Method and apparatus for examining a body by means of penetrating radiation such as X-rays
US7400701B1 (en) Backscatter inspection portal
USRE37536E1 (en) Split energy level radiation detection
US4017730A (en) Radiographic imaging system for high energy radiation
US5864141A (en) Compact, high-resolution, gamma ray imaging for scintimammography and other medical diagostic applications
US6735279B1 (en) Snapshot backscatter radiography system and protocol
US4736401A (en) X-ray scanner
US5150394A (en) Dual-energy system for quantitative radiographic imaging
US4933961A (en) Imaging system
US6448559B1 (en) Detector assembly for multi-modality scanners
US5040199A (en) Apparatus and method for analysis using x-rays
US7110493B1 (en) X-ray detector system having low Z material panel
Doshi et al. Design and evaluation of an LSO PET detector for breast cancer imaging
US20080298546A1 (en) Cargo container inspection method

Legal Events

Date Code Title Description
AS Assignment

Owner name: UNITED STATES TRUST COMPANY, 30/40 COURT ST., BOST

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMERICAN SCIENCE AND ENGINEERING, INC., A CORP. OF MA.;REEL/FRAME:005513/0323

Effective date: 19900703