Three-dimensional differential absorption x-ray cone-beam microtomography using balanced filters and algebraic reconstruction
✍ Scribed by Y.S. Ham; J.C. Russ; R.P. Gardner; K. Verghese
- Book ID
- 103989199
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 727 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0969-8043
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✦ Synopsis
A new x-ray tomographic method to image a particular element is proposed and described. This method uses an x-ray tube spectrum and a pair of balanced filters with absorption edges just above and just below the edge of the desired element. The proposed system consists of a microfocus x-ray tube as an x-ray source and a 2-D detector array to collect projection data. The main advantage of this system over traditional differential tomography using hvo monoenergetic sources is its easy application to fan-beam or cone-beam geometry without reducing too much its intensity. ART is used to reconstruct the 3-D images from the simulated projection data generated by a Monte Carlo program. Computer experiments demonstrate the feasibility of selective imaging in cone-beam geometry.