Application of Fresnel zone plates to hologram construction
To enhance the quality of scintillation images in nuclear medicine, some research has been oriented toward the use of a Fresnel Zone Plate (FZP) coding technique. Its utility is in its ability to perform recordings and reconstructions of three dimensional radioactive distributions. An analogy exists between optical holography and FZP since, apart from all other considerations, a FZP is nothing else but a Gabor's hologram of a point source. In this paper present how nuclear medicine imaging techniques for the coding and decoding of three dimensional objects can be applied to digital holography. We have developed algorithms for the reconstruction of near-field holograms (including Fresnel diffraction) in the framework of the scalar theory of diffraction and we study in more detail the impulse responses of these algorithms applied to FZP coded images in order to obtain the best possible parameters for a FZP coding.
Bibliographic Reference: Paper presented: Genie Biologique et Medical, Toulouse (FR), June 6-7, 1996
Availability: Available from (1) as Paper FR 39769 ORA
Record Number: 199610680 / Last updated on: 1996-06-21
Original language: fr
Available languages: fr