
Proceedings Paper
Potential use of a single scatter model in breast CBCT applicationsFormat | Member Price | Non-Member Price |
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Paper Abstract
A model based on singly scattered photons could potentially be of use to correct for scatter effects in breast
CBCT applications. Consider a simple phantom consisting of a 14 cm diameter 10.5 cm long cylindrical 50:50
mixture of fibroglandular and fat tissue with 21 cylindrical segments embedded along its central axis. One group
of segments were 2 mm in diameter with compositions 0:100, 20:80, 35:65, 50:50, 65:35, 80:20, and 100:0. The
remaining two groups had diameters of 5 mm and 10 mm. In order to reduce the computational time required,
GEANT4 was used to simulate a scatter profile for a single projection which was then utilized in generating
the large number of unique projections required for CBCT reconstruction. The scatter model was applied in an
attempt to correct the cupping artifact caused by x ray scatter in the reconstructed images. The model assumed
a homogeneous 50:50 phantom. The SPR generated by the model near the phantom center was at most 8%
below that simulated by GEANT4. The scatter corrected images showed an almost complete removal of the
cupping artifact. This simple model shows considerable promise in correcting scatter, though more research is
required to determine its validity in more realistic imaging tasks.
Paper Details
Date Published: 19 March 2014
PDF: 7 pages
Proc. SPIE 9033, Medical Imaging 2014: Physics of Medical Imaging, 903365 (19 March 2014); doi: 10.1117/12.2043629
Published in SPIE Proceedings Vol. 9033:
Medical Imaging 2014: Physics of Medical Imaging
Bruce R. Whiting; Christoph Hoeschen, Editor(s)
PDF: 7 pages
Proc. SPIE 9033, Medical Imaging 2014: Physics of Medical Imaging, 903365 (19 March 2014); doi: 10.1117/12.2043629
Show Author Affiliations
C. Laamanen, Laurentian Univ. (Canada)
R. J. LeClair, Laurentian Univ. (Canada)
Published in SPIE Proceedings Vol. 9033:
Medical Imaging 2014: Physics of Medical Imaging
Bruce R. Whiting; Christoph Hoeschen, Editor(s)
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