Zobrazeno 1 - 10
of 468
pro vyhledávání: '"iterative image reconstruction"'
Autor:
Farnaz Yousefzadeh, Mehran Yazdi, Seyed Mohammad Entezarmahdi, Reza Faghihi, Sadegh Ghasempoor, Negar Shahamiri, Zahra Abuee Mehrizi, Mahdi Haghighatafshar
Publikováno v:
EJNMMI Physics, Vol 11, Iss 1, Pp 1-22 (2024)
Abstract Purpose The problem of image denoising in single-photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) is a fundamental challenge. Although various image processing techniques have been presented, they may degrade th
Externí odkaz:
https://doaj.org/article/1a2f20db14744eb1ae7bc34e8aee9538
Autor:
Camiel E. M. Kerckhaert, Hugo W. A. M. de Jong, Marjolein B. M. Meddens, Rob van Rooij, Maarten L. J. Smits, Yothin Rakvongthai, Martijn M. A. Dietze
Publikováno v:
EJNMMI Physics, Vol 11, Iss 1, Pp 1-16 (2024)
Abstract Background Subtraction of single-photon emission computed tomography (SPECT) images has a number of clinical applications in e.g. foci localization in ictal/inter-ictal SPECT and defect detection in rest/stress cardiac SPECT. In this work, w
Externí odkaz:
https://doaj.org/article/31d5573fb73a49dfac5c5b364526b409
Autor:
Stefanie Kaser, Thomas Bergauer, Ander Biguri, Wolfgang Birkfellner, Sepideh Hatamikia, Albert Hirtl, Christian Irmler, Benjamin Kirchmayer, Felix Ulrich-Pur
Publikováno v:
Zeitschrift für Medizinische Physik, Vol 33, Iss 4, Pp 552-566 (2023)
Proton irradiation is a well-established method to treat deep-seated tumors in radio oncology. Usually, an X-ray computed tomography (CT) scan is used for treatment planning. Since proton therapy is based on the precise knowledge of the stopping powe
Externí odkaz:
https://doaj.org/article/7dad548715824d56bc50d6a0eb5ae2d3
Autor:
Metin Ertas
Publikováno v:
PeerJ, Vol 12, p e16715 (2024)
Compressed sensing-based reconstruction algorithms have been proven to be more successful than analytical or iterative methods for sparse computed tomography (CT) imaging by narrowing down the solution set thanks to its ability to seek a sparser solu
Externí odkaz:
https://doaj.org/article/c782b3dd03a143feb821d10415e10921
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Negar Omidvari, Li Cheng, Edwin K. Leung, Yasser G. Abdelhafez, Ramsey D. Badawi, Tianyu Ma, Jinyi Qi, Simon R. Cherry
Publikováno v:
Frontiers in Nuclear Medicine, Vol 2 (2022)
The current generation of total-body positron emission tomography (PET) scanners offer significant sensitivity increase with an extended axial imaging extent. With the large volume of lutetium-based scintillation crystals that are used as detector el
Externí odkaz:
https://doaj.org/article/0fdbd99b50e74e038b983e1e4fbd615c
Publikováno v:
IEEE Access, Vol 8, Pp 57400-57413 (2020)
The sparse view problem of image reconstruction encountered in computed tomography (CT) is an important research issue due to its considerable potential in lowering radiation dose. Among the researches, the total variation (TV) method is especially e
Externí odkaz:
https://doaj.org/article/2032bc1fc19f4f7e885d753f3b43dc27
Autor:
Takeshi Kojima, Tetsuya Yoshinaga
Publikováno v:
Algorithms, Vol 16, Iss 1, p 60 (2023)
Recently, an extended family of power-divergence measures with two parameters was proposed together with an iterative reconstruction algorithm based on minimization of the divergence measure as an objective function of the reconstructed images for co
Externí odkaz:
https://doaj.org/article/d6008e949f4841e4b0aca054c53afe81
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.