Share Email Print

Proceedings Paper

Application Of Fourier Techniques In CT Detector Alignment
Author(s): Haridas Kesavan; Dominic J. Heuscher
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

The application of DFT and FFT techniques provides a simpler detector alignment procedure in a fourth generation computed tomography system. A single scan of a circularly symmetric object can be used to provide the alignment data for this technique. Due to the symmetry involved, filtered autoconvolution employing an FFT technique similar to that used in CT reconstruction generates the locus of the perceived detector positions (known as the alignment curve). The fundamental components of this curve are seperated using a DFT to generate the actual detector alignment correction values. Applying these Fourier techniques to the CT alignment problem has simplified the calibration procedure necessary. Other applications having accurate positioning requirements may also benefit from these techniques.

Paper Details

Date Published: 1 May 1989
PDF: 10 pages
Proc. SPIE 1090, Medical Imaging III: Image Formation, (1 May 1989); doi: 10.1117/12.953234
Show Author Affiliations
Haridas Kesavan, Picker International (United States)
Dominic J. Heuscher, Picker International (United States)

Published in SPIE Proceedings Vol. 1090:
Medical Imaging III: Image Formation
Samuel J. Dwyer III; R. Gilbert Jost M.D.; Roger H. Schneider, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?