Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Polad M Shikhaliev"'
Autor:
Polad M. Shikhaliev
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 904:35-43
Computed tomography (CT) has a major advantage over radiography in that it provides 3D imaging and resolves the structural overlap problem inherent to radiography. Since the early 1970s, CT evolved in parallel with radiography in many areas. As megav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6edfdeaaf9d137d41c2a143bfabc069a
https://doi.org/10.1016/j.nima.2018.07.017
https://doi.org/10.1016/j.nima.2018.07.017
Autor:
Polad M. Shikhaliev
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 882:158-168
Megavoltage (MV) radiography has important applications in imaging large cargos for detecting illicit materials. A useful feature of MV radiography is the possibility of decomposing and quantifying materials with different atomic numbers. This can be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51ce81c2164ac52069a965dcb523d37e
https://doi.org/10.1016/j.nima.2017.11.001
https://doi.org/10.1016/j.nima.2017.11.001
Autor:
Polad M. Shikhaliev, Haluk Atak
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 867:58-71
Purpose: Photon counting (PC) computed tomography (CT) can provide material-selective CT imaging at low patient dose, but it suffers from suboptimal detector count rate. A dynamic beam attenuator (DBA) can help with the count rate by modulating the x
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6acf188925aa87f2b08af163684ca3ec
https://doi.org/10.1016/j.nima.2017.04.016
https://doi.org/10.1016/j.nima.2017.04.016
Autor:
Haluk Atak, Polad M. Shikhaliev
Publikováno v:
Medical Physics. 43:1385-1400
Purpose: In photon counting (PC)x-ray imaging and computed tomography(CT), the broad x-rayspectrum can be split into two parts using an x-ray filter with appropriate K-edge energy, which can improve material decomposition. Recent experimental study h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5eff214bbf60dbefbbbd90e3dc21a1dd
https://doi.org/10.1118/1.4941742
https://doi.org/10.1118/1.4941742
Autor:
Polad M Shikhaliev, Edison Liang, Alexander Henderson, Robert L. Carver, Kenneth R. Hogstrom, John P. Gibbons, David J. McLaughlin, Kenneth L. Matthews, Taylor Clarke
Publikováno v:
Medical Physics. 42:5517-5529
Purpose: The purpose of this work was to adapt a lightweight, permanent magnet electron energy spectrometer for the measurement of energy spectra of therapeutic electron beams. Methods: An irradiation geometry and measurement technique were developed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6cdb3a6d268faad8ca28516f99261f2
https://doi.org/10.1118/1.4928674
https://doi.org/10.1118/1.4928674
Autor:
Polad M Shikhaliev
Publikováno v:
Physics in Medicine and Biology. 57:1595-1615
Photon counting spectral computed tomography (PCSCT) provides material selective CT imaging at a single CT scan and fixed tube voltage. The PCSCT data are acquired in several energy ranges (bins) arranged over the x-ray spectrum. The quasi-monoenerge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f262c239acd2e3f6a554b95abe9f7493
https://doi.org/10.1088/0031-9155/57/6/1595
https://doi.org/10.1088/0031-9155/57/6/1595
Autor:
Shannon G Fritz, Polad M Shikhaliev
Publikováno v:
Physics in Medicine and Biology. 56:1905-1930
Spectral CT systems with photon counting detectors have more advantages compared to conventional CT systems. However, clinical applications have been hampered for a long time due to the high demands of clinical systems and limitations of spectroscopi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bf241008e98f2ddd2ea9bf454a549eb
https://doi.org/10.1088/0031-9155/56/7/001
https://doi.org/10.1088/0031-9155/56/7/001
Autor:
Shannon G Fritz, L Steven Bujenovic, Peter Petrek, Tong Xu, Polad M Shikhaliev, Kenneth L. Matthews
Publikováno v:
Physics in Medicine and Biology. 55:2841-2861
The aim of this study is to develop and test an intravascular positron imaging system based on a storage phosphor detector for imaging and detecting vulnerable plaques of human coronary arteries. The radiotracer F18-FDG accumulates in vulnerable plaq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d118fa570dc9103376606a93084eecd
https://doi.org/10.1088/0031-9155/55/10/004
https://doi.org/10.1088/0031-9155/55/10/004
Publikováno v:
Medical Physics. 36:5107-5119
Purpose: The purpose of this work was to investigate the effect of characteristic x rays on the performance of photon countingdetectors for multienergy x-ray imaging.X-ray and CT systems with photon countingdetectors have compelling advantages compar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5bdf3f4e87a325aaf7f2bb91e92b7a9a
https://doi.org/10.1118/1.3245875
https://doi.org/10.1118/1.3245875
Autor:
Polad M Shikhaliev
Publikováno v:
Physics in Medicine and Biology. 54:4971-4992
The signal-to-noise ratio (SNR) in x-ray imaging can be increased using a photon counting detector which could allow for rejecting electronics noise and for weighting x-ray photons according to their energies. This approach, however, was not feasible
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba7812c84528ce59eed0ee75d8ca4113
https://doi.org/10.1088/0031-9155/54/16/009
https://doi.org/10.1088/0031-9155/54/16/009