Referenced Items are not available for this document.
Pinhole SPECT is very sensitive to mechanical alignment because it is a magnifying geometry. Because of magnification, small mechanical shifts of the aperture result in a large change in the projection data. Helical orbits may be used for pinhole SPECT to improve the completeness of the projection data. This has been done by using a research scanner to provide rotation while a linear stage produces axial movement. The combined effect is a helical orbit. However, reconstruction quality may be limited by the alignment of the linear stage with the axis of rotation of the scanner. We have developed a laser system for aligning the linear stage. We present the system design and estimate the accuracy of its alignment Experimental helical pinhole SPECT data are presented.
Published in:
Nuclear Science Symposium Conference Record, 2003 IEEE
(Volume:3
)
Date of Conference: 19-25 Oct. 2003
- Page(s):
- 1860 - 1864 Vol.3
- ISSN :
- 1082-3654
- Print ISBN:
- 0-7803-8257-9
- INSPEC Accession Number:
- 8152990
- Digital Object Identifier :
- 10.1109/NSSMIC.2003.1352241
- Product Type:
- Conference Publications
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