Fourier coded aperture imaging in nuclear medicine

Chien Chou

Research output: Contribution to journalJournal Article peer-review

3 Scopus citations


Fourier Aperture (FA) consists of two sinusoidal gratings in contact with each other. One possible mode of operation, both gratings are rotated about the same axis through equal angles in opposite directions. A clear difference moiré fringes is shown. The moiré frequency depends on the angle between two gratings. This aperture of moiré fringes is used as a variable frequency grating. It is able to scan the object spectrum in frequency domain. The summation filtered back projection algorithm with three different apodizing functions were introduced in the reconstruction. 99mTc gamma ray source and 1" diameter Nal scintillation detector was used in the experiment. The thyroid phantom images show the spatial resolution of FA agree with the theoretical prediction. Three-D images capability is also discussed. The matrix inversion algorithm was used in the computer simulation of 3-D images. The depth resolution of FA is limited by the restricted view angle of the detector. Two plane objects with noise free in different depth were reconstructed.

Original languageEnglish
Pages (from-to)457-464
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 15 06 1984
Externally publishedYes


Dive into the research topics of 'Fourier coded aperture imaging in nuclear medicine'. Together they form a unique fingerprint.

Cite this