Abstract
To produce a parallel-projection image on a planar array of gamma-ray detectors, the standard procedure is to use a parallel-hole collimator. An alternative presented here to place a pinhole array in front of the detector and to synthesize parallel projections from the pinhole data. This eliminates the physical blurring and distance-dependent resolution effects of collimators, and replaces them with the mathematical problem of estimating projection integrals. We provide conditions under which this can reasonably be done and show some examples.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 251-259 |
| Number of pages | 9 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3336 |
| DOIs | |
| State | Published - 1998 |
| Externally published | Yes |
| Event | Medical Imaging 1998: Physics of Medical Imaging - San Diego, CA, United States Duration: Feb 22 1998 → Feb 24 1998 |
Keywords
- Image synthesis
- Parallel projections
- Pinhole apertures
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering