Title

Iterative method and apparatus for x-ray computed tomographic fluoroscopy

Document Type

Patent

Patent Number

US Patent 6,101,236

Patent agency

United States Patent and Trademark Office

Publication Date

8-8-2000

Assignee

University of Iowa Research Foundation (Iowa City, IA, US)

Application Number

09/165,370

Date Filed

1998-10-02

Total Pages

16 pages

Abstract

In the present invention, an iterative process is provided for computed tomographic fluoroscopy (CTF) based upon an ordered-subset based algorithm or an adaptation of the row-action expectation maximization (RAEM) formula. This process is applied to reduce metal artifacts in CTF imaging, reduce image noise and provide rapid-image updating suitable for real-time applications. In one embodiment, generation of a projection mask and computation of a relaxation matrix are used to compensate for beam divergence and data incompleteness, and a priori knowledge such as a known image support is used to reduce image reconstruction errors.

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URL

https://ir.uiowa.edu/patents/242