Claims
- 1. A system for correcting for scatter in a computed tomography scanner comprising:a tunnel having a platform disposed therein for receiving an object to be scanned; an x-ray source for directing x-rays at the object to be scanned; a detector array including a plurality of primary detectors for receiving said x-rays and at least one secondary detector for receiving portions of said x-ray beam scattered within said tunnel; and processing means for reducing the effects of scatter in images of the object reconstructed from the x-rays detected by said primary detectors, said processing means performing the steps of: A. determining an amount of scatter detected by said at least one secondary detector resulting from said tunnel and said platform prior to the placement of the object on said platform; B. determining an amount of scatter detected by said at least one secondary detector resulting from said tunnel, said platform and the object after the object has been placed on said platform; C. estimating an amount of scatter caused only by the presence of the object on said platform within said tunnel; and D. correcting the reconstructed images of the object based on the amount of scatter estimated in Step C.
- 2. A method of correcting for scatter in a computed tomography scanner having platform for receiving an object to be scanned, the platform being disposed within a tunnel, a primary detector array for detecting x-rays provided by and x-ray source and a secondary detector array for detecting scattered x-rays from said x-ray source, the method comprising:A. determining an amount of scatter detected by said secondary detector array resulting from the tunnel and the platform prior to the placement of the object on the platform; B. determining an amount of scatter detected by said secondary detector array resulting from the tunnel, the platform and the object after the object has been placed on the platform; C. estimating an amount of scatter caused only by the presence of the object on the platform within the tunnel; and D. correcting reconstructed images of the object based on the amount of scatter estimated in Step C.
RELATED APPLICATIONS
This application claims the benefit of U.S. Provisional Patent Application Serial No. 60/283,075, filed Apr. 11, 2001, entitled SCATTER CORRECTION FOR CT SCANNER, which application is hereby incorporated by reference in their entirety.
US Referenced Citations (8)
Non-Patent Literature Citations (1)
Entry |
G. H. Glover, “Compton Scatter Effects In CT Reconstructions”, Med. Phys. 9(6), Nov./Dec. 1982, 1982 Am. Assoc. Phys. Med., pp. 860-867. |
Provisional Applications (1)
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Number |
Date |
Country |
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60/283075 |
Apr 2001 |
US |