Method and apparatus for transmitting information about a target object between a prescanner and a CT scanner

• US 7,023,957 B2
• Filed: 11/19/2003
• Issued: 04/04/2006
• Est. Priority Date: 02/06/2002
• Status: Expired due to Term

• Current Assignee: Leidos Security Detection & Automation Incorporated (Leidos Holdings, Inc.)
• Original Assignee: L-3 Communications Security & Detection Systems, Inc. (Leidos Holdings, Inc.)
• Inventors: Eilbert, Richard F., Bijjani, Richard R., Shi, Shunghe
• Primary Examiner(s): Ho, Allen C.
• Application Number:
  US10/717,051
• Publication Number:
  US 20050053184A1
• Time in Patent Office: 867 Days
• Field of Search: 378/5, 378/7, 378/57, 378/86, 378/87, 378/89, 378/90, 378/98.9, 378/98.8
• US Class Current: 378/57
• CPC Class Codes: G01N 2223/402 mapping distribution of elements
• CPC Class Codes: G01N 2223/419 computed tomograph
• CPC Class Codes: G01N 2223/421 digitised image, analysed in real time (recognition algorithms)
• CPC Class Codes: G01N 23/046 using tomography, e.g. computed tomography [CT]
• CPC Class Codes: G01N 23/087 using polyenergetic X-rays
• CPC Class Codes: G01V 5/224 Multiple energy techniques using one type of radiation, e.g. X-rays of different energies
• CPC Class Codes: G01V 5/226 using tomography

Abstract

A method or apparatus for analyzing an object includes an X-ray prescanner that performs a prescan of the object to determine prescan information about the object. Then, a CT scanner performs a CT scan on at least one plane of the object based on the prescan information to determine CT information. In one embodiment, if the CT scan of the object includes or is in the vicinity of metal, then metal artifact correction of a reconstructed image from the CT scan is performed based on the prescan information. In another embodiment, a processor analyzes the CT information and the prescan information to determine whether to update the prescan information based on the CT information

Claims

1. A method for analyzing an object comprising:

prescanning the object using a multiple energy X-ray device to determine prescan information;

transmitting the prescan information to a processor coupled to a computed tomography device;

performing a computed tomography scan of at least a portion of the object based on the prescan information, wherein the computed tomography scan generates computed tomography scan data and is performed using the computed tomography device; and

performing a metal artifact correction on the computed tomography scan data, wherein the prescan information is used to perform the metal artifact correction on the computed tomography scan data.

2. The method of claim 1, wherein the processor is located within the computed tomography device.

3. The method of claim 1, wherein prescanning comprises prescanning the object using a second computed tomography device.

4. A method for analyzing an object comprising:

prescanning the object using a multiple energy X-ray device to determine information indicative of effective atomic number characteristics of the object;

transmitting, to another device that is separate from and coupled to the multiple energy X-ray device, a transmission that is based at least partially on the information; and

using the information received at the device to process scan data generated by a computed tomography device.

5. The method of claim 4, wherein the another device is a processor coupled to the computed tomography device, and wherein at least a portion of the multiple energy X-ray device is not common to the computed tomography device.

6. The method of claim 4, further comprising:

using the information to select an area of interest of the object based upon the information; and

conducting a scan of the area of interest of the object with the computed tomography device to generate the scan data.

7. The method of claim 4, wherein using the information received at the device to process scan data comprises using the information to apply a metal artifact correction algorithm to the scan data.

8. The method of claim 4, wherein the transmission comprises the information.

9. The method of claim 4, wherein using the information received at the device to process scan data comprises using the information to determine a type of a metal positioned to create a metal artifact in the scan data.

10. The method of claim 4, wherein using the information received at the device to process scan data comprises using the information to determine a shape of a metal positioned to create a metal artifact in the scan data.

11. The method of claim 4, wherein using the information received at the device to process scan data comprises using the information to make a decision relating to threat detection.

12. The method of claim 4, wherein the multiple energy x-ray device comprises a processor that is separate from the device.