Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Albert Henry Roger Lonn"'
Autor:
Gaspar Delso, G. Novak, Sonal Ambwani, Albert Henry Roger Lonn, Florian Wiesinger, M. Fidrich, Rakesh Mullick, A. Tari, Z. Piti, Scott David Wollenweber
Publikováno v:
IEEE Transactions on Nuclear Science. 60:3383-3390
The goal of this study was to compare MR-based PET patient attenuation correction (AC) to CT-based AC in the head using clinical whole-body FDG-PET patient data obtained from a tri-modality PET/CT & MR setup. The MR-based AC utilizes an atlas-based a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7cb6e8cdfaf3f6498db61ae49fece84
https://doi.org/10.1109/tns.2013.2273417
https://doi.org/10.1109/tns.2013.2273417
Autor:
Sandeep Kaushik, Albert Henry Roger Lonn, Scott David Wollenweber, Gaspar Delso, Florian Wiesinger, Dattesh Dayanand Shanbhag, Sheshadri Thiruvenkadam, Rakesh Mullick, Sonal Ambwani, Hua Qian
Publikováno v:
IEEE Transactions on Nuclear Science. 60:3391-3398
The goal of this study was to compare two approaches for MR-based PET patient attenuation correction (AC) in whole-body FDG-PET imaging using a tri-modality PET/CT & MR setup. Sixteen clinical whole-body FDG patients were included in this study. Mean
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56d3566cb1e8bee2984c0df02d3466f5
https://doi.org/10.1109/tns.2013.2278759
https://doi.org/10.1109/tns.2013.2278759
Autor:
Albert Henry Roger Lonn, Gaspar Delso, Florian Wiesinger, Patrick Veit-Haibach, Scott David Wollenweber
Publikováno v:
Physics in Medicine and Biology. 58:2267-2280
Among the proposed system architectures capable of delivering positron emission tomography/magnetic resonance (PET/MR) datasets, tri-modality systems open an interesting field in which the synergies between these modalities can be exploited to addres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa27e3e5b4f61af7698991197eebb66a
https://doi.org/10.1088/0031-9155/58/7/2267
https://doi.org/10.1088/0031-9155/58/7/2267
Publikováno v:
Medical Physics. 39:6028-6034
Purpose: To further improve the image quality, in particularly, to suppress the boundary artifacts, in the extended scan field-of-view (SFOV) reconstruction. Methods: To combat projection truncation artifacts and to restore truncated objects outside
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3081a1c4e0281ecc068eb1497d8a5295
https://doi.org/10.1118/1.4752086
https://doi.org/10.1118/1.4752086
Publikováno v:
2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC).
In PET/MR the attenuation map required for PET reconstruction is obtained by segmenting MR images and assigning linear attenuation coefficients (LAC) to the segmented regions. Some tissues such as brain, muscle and fat have relatively uniform attenua
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c36045da51b5555d180bb46683fd57f
https://doi.org/10.1109/nssmic.2012.6551689
https://doi.org/10.1109/nssmic.2012.6551689
Publikováno v:
2011 IEEE Nuclear Science Symposium Conference Record.
We have previously described the algorithm for estimating the contribution of random coincidences to the PET dataset using a set of singles counters, one per detector element, which accumulate the single events transmitted to the coincidence processo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb73b776a1403549e72ccf5cd2b5e35d
https://doi.org/10.1109/nssmic.2011.6153706
https://doi.org/10.1109/nssmic.2011.6153706
Autor:
Albert Henry Roger Lonn, Stephen J. Lokitz, Jean-Baptiste Thibault, Timothy G. Turkington, Jiang Hsieh, Tinsu Pan, James G. Colsher
Publikováno v:
2008 IEEE Nuclear Science Symposium Conference Record.
In this paper, we present an ultra low-dose CT acquisition and reconstruction technique that provides sufficient image quality for PET attenuation correction while keeping the CT dose to a minimum. With PET/CT, CT is used instead of radioactive trans
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a52b9c96e0623408047453ddddf1290a
https://doi.org/10.1109/nssmic.2008.4774499
https://doi.org/10.1109/nssmic.2008.4774499
Autor:
Jeremy J. Erasmus, Albert Henry Roger Lonn, Rachelle Campbell, Homer A. Macapinlac, S.G. Kohlmyer, Dianna D. Cody, Donald A. Podoloff, Tinsu Pan, Osama Mawlawi
Publikováno v:
AJR. American journal of roentgenology. 186(5)
Discrepancy between fields of view (FOVs) in a PET/CT scanner causes a truncation artifact when imaging extends beyond the CT FOV. The purposes of this study were to evaluate the impact of this artifact on measurements of 18F-FDG activity concentrati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3771542b510fd114230db6b606c64c57
https://pubmed.ncbi.nlm.nih.gov/16632745
https://pubmed.ncbi.nlm.nih.gov/16632745
Publikováno v:
2006 IEEE Nuclear Science Symposium Conference Record.
The Discovery ST PET-CT scanner corrects the attenuation of the 511 keV PET emission using an attenuation map derived from a CT scan which is acquired with a 50 cm detector field of view. The PET scanner uses a 70 cm reconstruction field of view, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d88fd7d3c6c57f20217601341db0b808
https://doi.org/10.1109/nssmic.2006.356450
https://doi.org/10.1109/nssmic.2006.356450
Publikováno v:
SPIE Proceedings.
Reprojection is the process by which projections are produced from an image such that, if these projections are filtered and backprojected, they yield the original image. Because of the computational expense of reprojection, algorithms that employ th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6bfc5135ce9207ccb0540370b35a4e7
https://doi.org/10.1117/12.968646
https://doi.org/10.1117/12.968646