NDLI: Evaluation of rotating slant-hole SPECT mammography using Monte-Carlo simulation methods

Content Provider	IEEE Xplore Digital Library
Author	Baird, W.H. Frey, E.C. Tsui, B.M.W. Yuchuan Wang Wessell, D.E.
Copyright Year	2002
Description	Author affiliation: Dept. of Biomed. Eng., North Carolina Univ., Chapel Hill, NC, USA (Baird, W.H.; Frey, E.C.; Tsui, B.M.W.; Yuchuan Wang)
Abstract	Multi-segment slant-hole (MSSH) collimators provide much higher detection efficiency of breast lesions at a single view than conventional low-energy high-resolution (LEHR) parallel-hole collimators. The purpose of this study is to evaluate rotating MSSH (RMSSH) SPECT mammography using Monte Carlo Simulation methods. We modified the SIMIND Monte Carlo code to generate RMSSH projection data including the effects of attenuation, collimator-detector response and scatter from a realistic NCAT phantom with an attached breast and a lesion placed at locations at the center and at the near and far walls of the breast. The projection data were reconstructed using analytic and iterative image reconstruction methods. For comparison, we examine an LEHR collimator with a resolution of 1 cm at 15.2 cm, which is the same as that of the MSSH at the center of the common volume-of-view. Also, we simulated the inclusion of a lead shield that covers the body to keep photons emitted from the other organs from reaching the MSSH collimator. Our results indicated that RMSSH SPECT provides greater breast lesion contrast than that of a planar image taken using a conventional LEHR collimator at all lesion locations. Depending on the lesion location, the spatial resolution of the RMSSH SPECT images may be comparable or slightly poorer than that of the planar scintimammographic images obtained using a LEHR collimator. Shielding of photon emissions from the other organs substantially improves the RMSSH SPECT image quality. We conclude that the Monte Carlo simulation methods are useful in evaluating the application of RMSSH SPECT to breast imaging as compared to conventional planar scintimammography and that RMSSH SPECT may enhance lesion detectability.
Starting Page	1331
Ending Page	1334
File Size	442949
Page Count	4
File Format	PDF
ISBN	0780373243
ISSN	10823654
DOI	10.1109/NSSMIC.2001.1008583
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-11-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mammography Collimators Lesions Breast Image reconstruction Single photon emission computed tomography Monte Carlo methods Attenuation Electromagnetic scattering Particle scattering
Content Type	Text
Resource Type	Article

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