Patent · US Expired

Method and apparatus for removing objects from CT images

US4590558A · kind A · utility

51Cited by
12References
5Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 30, 1981
Grant dateMay 20, 1986
Priority date—
Expiry dateDec 30, 2001

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10S378/901
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

Method and apparatus for producing CT images in which localized regions ("rub-out" regions) of the original object are not reproduced in order to eliminate artifacts generated by objects within those regions. An operator defines a rub-out region encompassing the object to be removed. The projection set is then modified by creating an average function within the rub-out region which is strongly influenced by the discontinuity created by the object. That information is then utilized to modify the projection set, in effect eliminating the object from the set. The projection set is then used to create a reconstructed image in the normal way.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.