Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Alexander A. Zamyatin"'
Publikováno v:
Medical Imaging 2022: Physics of Medical Imaging.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::643d48eec441e58fcff39dd8d44e0eeb
https://doi.org/10.1117/12.2611575
https://doi.org/10.1117/12.2611575
Publikováno v:
Innovative technologies in construction and management of infrastructure technical state. Сборник научных трудов IV Всероссийской национальной научно-практической конференции.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8671cdfc400a6249eb6797e59832d115
https://doi.org/10.46973/9785907295612_2022_53
https://doi.org/10.46973/9785907295612_2022_53
Publikováno v:
Vestnik Tomskogo gosudarstvennogo universiteta. Upravlenie, vychislitel'naya tekhnika i informatika. :57-66
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a53537c42724bc68ac56153097109408
https://doi.org/10.17223/19988605/48/7
https://doi.org/10.17223/19988605/48/7
Publikováno v:
SIAM Journal on Imaging Sciences. 4:200-219
In this paper we study local tomography (LT) in the motion contaminated case. It is shown that microlocally, away from some critical directions, LT is equivalent to a pseudodifferential operator of order one. LT also produces nonlocal artifacts that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aba69c2349bbe20aaba2bfb2f332d92f
https://doi.org/10.1137/100796728
https://doi.org/10.1137/100796728
Publikováno v:
Physics in Medicine and Biology. 53:N423-N435
We investigate image reconstruction with a circle and line trajectory with a tilted gantry. We derive new equations for reconstruction from the line data, such as equations of filtering lines, range of filtering lines and range of the line scan. We a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f9924fe8b4be1700629faa9e7059e6f
https://doi.org/10.1088/0031-9155/53/23/n02
https://doi.org/10.1088/0031-9155/53/23/n02
Extension of the reconstruction field of view and truncation correction using sinogram decomposition
Publikováno v:
Medical Physics. 34:1593-1604
We propose a novel truncation correction algorithm that completes unmeasured data outside of the scan field of view, which allows extending the reconstruction field of view. When a patient extends outside the detector coverage the projection data are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db35ea11ddcc1cb8bbe5e9e9d82e8a75
https://doi.org/10.1118/1.2721656
https://doi.org/10.1118/1.2721656
Publikováno v:
IEEE Transactions on Nuclear Science. 53:167-174
Great strides have been taken in the last few years in the development of both approximate and exact reconstruction algorithms for helical cone-beam CT. The proposed algorithm uses so-called hybrid convolution which is a sum of ramp filtering and Hil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2df16724b8b09e531bdf3065b75fe430
https://doi.org/10.1109/tns.2005.862973
https://doi.org/10.1109/tns.2005.862973
Publikováno v:
Medical Physics. 32:3117-3127
If a multislice or other area detector is shifted to one side to cover a larger field of view, then the data are truncated on one side. We propose a method to restore the missing data in helical cone-beam acquisitions that uses measured data on the l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e4c8b7a3f09638b2b4ef914ab1c8d61
https://doi.org/10.1118/1.2047784
https://doi.org/10.1118/1.2047784
Publikováno v:
Medical Imaging: Image Processing
In this work we revisit TV filter and propose an improved version that is tailored to diagnostic CT purposes. We revise TV cost function, which results in symmetric gradient function that leads to more natural noise texture. We apply a multi-scale ap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cff1733131eaa5aa3ed39a199004cb0
https://doi.org/10.1117/12.2043841
https://doi.org/10.1117/12.2043841
Autor:
Qiulin Tang, Akinola Akinyemi, Alexander A. Zamyatin, Satoru Nakanishi, Bibo Shi, Be-Shan Chiang
Publikováno v:
SPIE Proceedings.
A new motion estimation and compensation method for cardiac computed tomography (CT) was developed. By combining two motion estimation (ME) approaches the proposed method estimates the local and global cardiac motion and then preforms motion compensa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c4988ceb0217751e0c7519c519452f5
https://doi.org/10.1117/12.2043492
https://doi.org/10.1117/12.2043492