Myocardial perfusion single-photon emission computed tomography (SPECT) image denoising: a comparative study

A Rahimian, M Etehadtavakol, M Moslehi, EYK Ng - Diagnostics, 2023 - mdpi.com
The present study aimed to evaluate the effectiveness of different filters in improving the
quality of myocardial perfusion single-photon emission computed tomography (SPECT) …

Reconstruction of preclinical PET images via chebyshev polynomial approximation of the sinogram

NE Protonotarios, AS Fokas, A Vrachliotis… - Applied Sciences, 2022 - mdpi.com
Over the last decades, there has been an increasing interest in dedicated preclinical
imaging modalities for research in biomedicine. Especially in the case of positron emission …

Comparison of Low‐Pass Filters for SPECT Imaging

IS Sayed, SS Ismail - International journal of biomedical …, 2020 - Wiley Online Library
In single photon emission computed tomography (SPECT) imaging, the choice of a suitable
filter and its parameters for noise reduction purposes is a big challenge. Adverse effects on …

Inversion formula for an integral geometry problem over surfaces of revolution

Z Ustaoglu - Studies in Applied Mathematics, 2024 - Wiley Online Library
An integral geometry problem is considered on a family of nn‐dimensional surfaces of
revolution whose vertices lie on a hyperplane and directions of symmetry axes are fixed and …

Effectiveness of the smoothing filter in pediatric 99mTc-dimercaptosuccinic acid renal scintigraphy

H Saito, T Ito, K Omachi, A Inugami… - … Physics and Technology, 2020 - Springer
The present study aimed to evaluate whether the use of a smoothing filter would improve the
image quality in pediatric 99m Tc-dimercaptosuccinic acid (99m Tc-DMSA) scintigraphy. We …

Reconstruction of a function from its two spherical Radon transforms with the centers on a plane

R Aramyan - arXiv preprint arXiv:2404.04630, 2024 - arxiv.org
Hyperplane is a set of non-injectivity of the spherical Radon transform (SRT) in the space of
continuous functions in R^ d. In this article, for the reconstruction of an unknown function f …

Evaluation of the spline reconstruction technique for preclinical PET imaging

A Vrachliotis, GA Kastis, NE Protonotarios… - Computer Methods and …, 2022 - Elsevier
Abstract Background and Objective The Spline Reconstruction Technique (SRT) is a fast
algorithm based on a novel numerical implementation of an analytic representation of the …

Quantification of T1, T2 relaxation times from Magnetic Resonance Fingerprinting radially undersampled data using analytical transformations

N Dikaios, NE Protonotarios, AS Fokas… - Magnetic Resonance …, 2021 - Elsevier
Quantitative magnetic resonance imaging (MRI) estimates magnetic parameters related to
tissue, such as T1, T2 relaxation times and proton density. MR fingerprinting (MRF) is a new …

Inversion of the two‐data circular Radon transform centered on a curve on C (R 2) \calC(R^2)

R Aramyan - Studies in Applied Mathematics - Wiley Online Library
More often, in the mathematical literature, the injectivity of the spherical Radon transform
(SRT) for compactly supported functions is considered. In this article, an additional condition …

Fokas on Medical Imaging: Analytic Reconstructions for Emission Tomography

NE Protonotarios, K Kalimeris, GA Kastis - International Conference on …, 2022 - Springer
Mathematical problems associated with the theoretical foundations of emission tomography
involve the inversion of the celebrated Radon transform of a function, defined as the set of all …