Charles W Stearns
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Explore the profile of Charles W Stearns including associated specialties, affiliations and a list of published articles.
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15
Citations
216
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0
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Recent Articles
1.
Twyman R, Arridge S, Kereta Z, Jin B, Brusaferri L, Ahn S, et al.
IEEE Trans Med Imaging
. 2022 Aug;
42(1):29-41.
PMID: 36044488
Penalised PET image reconstruction algorithms are often accelerated during early iterations with the use of subsets. However, these methods may exhibit limit cycle behaviour at later iterations due to variations...
2.
Tsai Y, Schramm G, Ahn S, Bousse A, Arridge S, Nuyts J, et al.
IEEE Trans Med Imaging
. 2019 May;
39(1):11-22.
PMID: 31144629
In this study, we explore the use of a spatially-variant penalty strength in penalized image reconstruction using anatomical priors to reduce the dependence of lesion contrast on surrounding activity and...
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Tsai Y, Bousse A, Ehrhardt M, Stearns C, Ahn S, Hutton B, et al.
IEEE Trans Med Imaging
. 2018 Apr;
37(4):1000-1010.
PMID: 29610077
This paper reports on the feasibility of using a quasi-Newton optimization algorithm, limited-memory Broyden-Fletcher-Goldfarb-Shanno with boundary constraints (L-BFGS-B), for penalized image reconstruction problems in emission tomography (ET). For further acceleration,...
6.
Bertolli O, Arridge S, Wollenweber S, Stearns C, Hutton B, Thielemans K
Phys Med Biol
. 2017 Mar;
62(8):3204-3220.
PMID: 28346222
Patient respiratory motion during PET image acquisition leads to blurring in the reconstructed images and may cause significant artifacts, resulting in decreased lesion detectability, inaccurate standard uptake value calculation and...
7.
Bowen S, Pierce L, Alessio A, Liu C, Wollenweber S, Stearns C, et al.
J Med Imaging (Bellingham)
. 2015 Jul;
1(2):026001.
PMID: 26158039
The objective of this investigation was to propose techniques for determining which patients are likely to benefit from quantitative respiratory-gated imaging by correlating respiratory patterns to changes in positron emission...
8.
Nyflot M, Lee T, Alessio A, Wollenweber S, Stearns C, Bowen S, et al.
Med Phys
. 2015 Jan;
42(1):110-20.
PMID: 25563252
Purpose: Respiratory-correlated positron emission tomography (PET/CT) 4D PET/CT is used to mitigate errors from respiratory motion; however, the optimal CT attenuation correction (CTAC) method for 4D PET/CT is unknown. The...
9.
MacDonald L, Schmitz R, Alessio A, Wollenweber S, Stearns C, Ganin A, et al.
IEEE Nucl Sci Symp Conf Rec (1997)
. 2011 Nov;
4:2488-2493.
PMID: 22072860
We investigated the use of partial collimation on a clinical PET scanner by removing septa from conventional 2D collimators. The goal is to improve noise equivalent count-rates (NEC) compared to...
10.
Application and evaluation of a measured spatially variant system model for PET image reconstruction
Alessio A, Stearns C, Tong S, Ross S, Kohlmyer S, Ganin A, et al.
IEEE Trans Med Imaging
. 2010 Mar;
29(3):938-49.
PMID: 20199927
Accurate system modeling in tomographic image reconstruction has been shown to reduce the spatial variance of resolution and improve quantitative accuracy. System modeling can be improved through analytic calculations, Monte...