Method for position emission mammography image reconstruction
An image reconstruction method comprising accepting coincidence datat from either a data file or in real time from a pair of detector heads, culling event data that is outside a desired energy range, optionally saving the desired data for each detector position or for each pair of detector pixels on the two detector heads, and then reconstructing the image either by backprojection image reconstruction or by iterative image reconstruction. In the backprojection image reconstruction mode, rays are traced between centers of lines of response (LOR's), counts are then either allocated by nearest pixel interpolation or allocated by an overlap method and then corrected for geometric effects and attenuation and the data file updated. If the iterative image reconstruction option is selected, one implementation is to compute a grid Siddon retracing, and to perform maximum likelihood expectation maiximization (MLEM) computed by either: a) tracing parallel rays between subpixels on opposite detector heads; or b) tracing rays between randomized endpoint locations on opposite detector heads.
- Research Organization:
- Southeastern Universities Research Association, Inc.,Newport News, VA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-84ER 40150
- Assignee:
- Southeastern Universities Research Association, Inc.
- Patent Number(s):
- 6,804,325
- Application Number:
- 10/280,699
- OSTI ID:
- 1175078
- Country of Publication:
- United States
- Language:
- English
Analysis of factors affecting positron emission mammography (PEM) image formation
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journal | February 2003 |
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