Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Johannes Zeintl"'
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 51(6)
We present a calibration method of a clinical SPECT/CT device for quantitative 99mTc SPECT. We use a commercially available reconstruction package including ordered-subset expectation maximization (OSEM) with depth-dependent 3-dimensional resolution
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee06cb4181963a692150da3ff6a48381
https://pubmed.ncbi.nlm.nih.gov/20484423
https://pubmed.ncbi.nlm.nih.gov/20484423
Publikováno v:
2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC).
We investigated biases in time-activity measurements relevant for quantitative dynamic SPECT/CT imaging when slow-rotating dual-headed gamma camera systems in combination with OSEM-3D (Flash3D) with scatter and attenuation correction are used. The go
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6fb03caab6cc3fd37ca04ecc2874659b
https://doi.org/10.1109/nssmic.2009.5401914
https://doi.org/10.1109/nssmic.2009.5401914
Publikováno v:
2008 IEEE Nuclear Science Symposium Conference Record.
Phantom studies are typically the first tests when the performance of the imaging system needs to be verified or when a problem needs troubleshooting. It is not always clear whether the resulting image indicates a systematic problem with the system.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23d3cf4d42ce5c6aec8cef43d9c9c591
https://doi.org/10.1109/nssmic.2008.4774448
https://doi.org/10.1109/nssmic.2008.4774448
Autor:
Torsten Kuwert, Joachim Hornegger, Alexander Hans Vija, Xinhong Ding, Amos Yahil, Johannes Zeintl
Publikováno v:
2008 IEEE Nuclear Science Symposium Conference Record.
In this study we systematically investigate biases relevant to quantitative SPECT if OSEM with isotropic (3D) depth dependent resolution recovery (OSEM-3D), attenuation and scatter correction is used. We focus on the dependencies of activity estimati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fb2ff19eee433ad0e93364b3b4923bf
https://doi.org/10.1109/nssmic.2008.4774185
https://doi.org/10.1109/nssmic.2008.4774185
Autor:
Torsten Kuwert, Xinhong Ding, Alexander Hans Vija, Johannes Zeintl, Joachim Hornegger, E.G. Hawman
Publikováno v:
2007 IEEE Nuclear Science Symposium Conference Record.
Iterative reconstruction methods with 3D resolution recovery, and attenuation and scatter compensations are now common in clinical practice. Still, the reconstruction of ECG gated cardiac SPECT data is often done with filtered backprojection (FBP) to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00960b644f1601b664884492928e5b2a
https://doi.org/10.1109/nssmic.2007.4437109
https://doi.org/10.1109/nssmic.2007.4437109
Publikováno v:
2006 IEEE Nuclear Science Symposium Conference Record.
Significant debate remains whether the established imaging protocols for myocardial perfusion SPECT delivers optimal image quality. This debate has been intensified with the introduction of advanced iterative reconstruction techniques which differ co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10eebbcc7e79dbe930faff3b5f6035cd
https://doi.org/10.1109/nssmic.2006.353702
https://doi.org/10.1109/nssmic.2006.353702