Incoherent optical processor for x-ray transaxial tomography

J. E. Greivenkamp, W. Swindell, A. F. Gmitro, H. H. Barrett

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


A single-channel incoherent optical processor that reconstructs an object from its 1-D x-ray projections has been developed. The projection data are recorded directly on x-ray film, which, after development, is used as the input transparency for the processor. The same computing algorithms used by commercial computed tomography units are optically implemented to reconstruct the object from these projections. The totally analog processor employs time-modulated OTF synthesis to achieve the necessary bipolar filtering operations. This technique involves a time-varying pupil plane mask in conjunction with synchronous demodulation of the detector output to obtain the desired response. Results are presented that are similar in quality to reconstructions produced by commercial scanners. The advantage of this system is that it should offer equivalent performance at a reduced cost.

Original languageEnglish (US)
Pages (from-to)264-273
Number of pages10
JournalApplied optics
Issue number2
StatePublished - Jan 1981

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


Dive into the research topics of 'Incoherent optical processor for x-ray transaxial tomography'. Together they form a unique fingerprint.

Cite this