Architecture for CT scanning system

• US 6,185,272 B1
• Filed: 03/15/1999
• Issued: 02/06/2001
• Est. Priority Date: 03/15/1999
• Status: Expired due to Term

• Current Assignee: Analogic Corporation
• Original Assignee: Analogic Corporation
• Inventors: Crawford, Carl R., Simanovsky, Sergey, Hiraoglu, Muzaffer, Bechwati, Ibrahim M.
• Primary Examiner(s): BRUCE, DAVID VERNON
• Application Number:
  US09/268,628
• Time in Patent Office: 694 Days
• Field of Search: 378/4, 378/8, 378/15, 378/62, 378/57, 378/901
• US Class Current: 378/57
• CPC Class Codes: G01V 5/20 Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: Y10S 378/901 Computer tomography program or processor

Abstract

A system for and method of detecting and classifying objects contained within or concealed by items scanned by an X-ray scanner is described. Greater throughput and relatively reduced cost is achieved by using a shared bulk memory for entering imaging data received from the scanner into slots of a bulk shared memory; and storing detection and classification data in slots of the bulk memory after processing imaging data so as to provide detection and classification data relating to absence or suspected presence of predetermined target objects. Preferably, the scanner is a CT scanner and the imaging data is CT data.

Claims

1. A system for automatically detecting predetermined image information contained with data representative of a scanned image of an object, a system architecture comprising:

one or more data processes to fill shared memory with the data;

one or more detection processes to detect the presence of the predetermined image information from the data in shared memory;

one or more display processes to display information related to (a) the data and (b) the presence of the predetermined image information from the data in shared memory; and

a controller process constructed and arranged so as to support the data, detection and display processes substantially independently of one another all on the same computer system having predetermined resources so that the resources are used in an optimal timely fashion.

2. A system according to claim 1, further including a conveyor constructed and arranged to sequentially scan a plurality of objects.

3. A system according to claim 1, wherein the detection processes provide detection and classification data relating to the presence or absence of the predetermined image information.

4. A system according to claim 3, wherein the detection processes are arranged so as to coordinate themselves.

5. A system according to claim 3, wherein the detection processes are controlled by a controller.

6. A system according to claim 5, further including a controller, and wherein access to the shared bulk memory is controlled by the controller.

7. A system according to claim 1, further including an access flag arranged so as control access to the shared bulk memory.

8. A system according to claim 1, further including an archive system constructed and arrange to store the imaging data.

9. A system according to claim 1, further including a non-volative memory of an archive system constructed and arranged to store the imaging data.

10. A system according to claim 1, further including a scanner constructed and arranged so as to scan the object so as to acquire the data.

11. A system according to claim 10, wherein the scanner is a CT scanner, and further including a display constructed and arranged so as to display information related to at least one CT slice and associated detection data.

12. A system according to claim 11, wherein the system is constructed and arranged to display the CT data in the order that the detection processes are completed with respect to each scanned item.

13. A system according to claim 11, wherein the system is constructed and arranged to display the CT data in the order each item enters the scanner.

14. A system according to claim 11, wherein the system is constructed and arranged to display markings of suspected objects in images of CT slices.

15. A system according to claim 11, wherein the system is constructed and arranged to display markings of suspected objects in synthetic projections of the items.

16. A system according to claim 11, wherein the system is constructed and arranged to display additional information associated suspected objects detected.

17. A system according to claim 16, wherein the system is constructed and arranged to display markings of suspected objects in the display information and linking information related to a suspected object and the markings.

18. A system according to claim 11, wherein the system is constructed and arranged so that the information displayed automatically changes as the items move through the scanner, and is capable of suspending the display of information related to at least one of said CT slices and associated detection data to examine the display.

19. A system according to claim 11, wherein the system is constructed and arranged so that a false detection of a suspected object can be cleared by the operator.

20. A system according to claim 11, wherein the information displayed includes information regarding any items that have been scanned by the scanner and data that are waiting to be displayed.

21. A system according to claim 20, wherein the information displayed includes the number of such items.

22. A system according to claim 20, wherein the information regarding any items that have been scanned includes item identification numbers associated with such items.

23. A system according to claim 11, wherein information displayed includes information regarding any items that are awaiting detection by the scanner.

24. A system according to claim 23, wherein information regarding any items that are awaiting detection includes displaying the number of such items.

25. A system according to claim 23, wherein the information regarding any items that are awaiting detection includes item identification numbers associated with such items.

26. A scanning apparatus capable of detecting and classifying objects contained within or concealed by items scanned by the apparatus, the scanning apparatus comprising:

A. at least one CT x-ray scanner constructed and arranged so as to generate CT data representative of a plurality of CT slices of a scanned item;

B. a communication subsystem in communication with the scanner;

C. a detection and classification subsystem constructed and arranged so as to process CT data and provide detection and classification data related to the absence or the suspected presence of detected objects associated with one or more CT slices of a scanned item;

D. a bulk shared memory comprising a plurality of memory slots constructed to store CT data and detection and classification data related to the detection and classification of suspected objects derived from the CT data; and

E. a control subsystem cooperative with (1) the communication system so as to enter CT data received from the scanner into slots of the bulk shared memory;

(2) the detection and classification subsystem so as process CT data so as to provide detection and classification data, and store the detection and classification data in slots of the bulk shared memory.

27. A scanning apparatus according to claim 26, further including a conveying system for conveying items through the scanner.

28. A scanning apparatus according to claim 26, wherein said detection and classification subsystem includes multiple processors each cooperative with the bulk shared memory.

29. A scanning system according to claim 26, wherein said detection and classification subsystem is constructed and arranged so as to process CT data and provide detection and classification data related to the absence or the suspected presence of objects associated with one or more CT slices of a scanned item in accordance with each of a plurality of different sets of detection criteria and a plurality of independent processes.

30. A scanning system according to claim 29, wherein the plurality of independent processes coordinate themselves.

31. A scanning system according to claim 29, wherein said control subsystem includes a coordinator constructed to coordinate the plurality of independent processes.

32. A scanning system according to claim 31, wherein said coordinator controls access to the shared bulk memory.

33. A scanning system according to claim 26, wherein the control subsystem includes an access flag for controlling access to the shared bulk memory.

34. A scanning system according to claim 26, further including an archive subsystem constructed and arranged so as to store CT data.

35. A scanning system according to claim 33, wherein the archive system includes non-volatile memory constructed and arranged to store CT data.

36. A scanning apparatus according to claim 26, further including a display constructed and arranged so as to display information related to at least one of said CT slices and associated detection data.

37. A method of detecting predetermined objects contained within or concealed by items scanned by an X-ray scanner, comprising:

entering imaging data received from the scanner into slots of a bulk shared memory;

processing imaging data so as to provide detection and classification data relating to absence or suspected presence of predetermined objects; and

storing the detection and classification data in slots of the bulk shared memory.

38. Method according to claim 37, wherein processing imaging data includes sharing bulk memory among a plurality of processors.

39. A process of detecting the presence of predetermined objects contained within or concealed by items scanned by an X-ray scanner, comprising:

receive a set of data representative of a corresponding scanned object and store the set of data in a predefined slot in memory in a predetermined data queue;

process data in each slot in a predetermined detection queue in accordance with one or more detection processes;

storing the results of each detection process in the same slot in which the corresponding set of data is stored; and

displaying the results of the detection process.