Zobrazeno 1 - 10
of 149
pro vyhledávání: '"George Fountos"'
Autor:
Christos Michail, Panagiotis Liaparinos, Nektarios Kalyvas, Ioannis Kandarakis, George Fountos, Ioannis Valais
Publikováno v:
Sensors, Vol 24, Iss 19, p 6251 (2024)
Medical imaging instrumentation design and construction is based on radiation sources and radiation detectors/sensors. This review focuses on the detectors and sensors of medical imaging systems. These systems are subdivided into various categories d
Externí odkaz:
https://doaj.org/article/0ebd6a09205c498d908e5401c47499c0
Autor:
Vasileios Ntoupis, Christos Michail, Nektarios Kalyvas, Athanasios Bakas, Ioannis Kandarakis, George Fountos, Ioannis Valais
Publikováno v:
Inorganics, Vol 12, Iss 8, p 230 (2024)
The aim of this study was to experimentally assess the luminescence efficiency of a cerium fluoride (CeF3) inorganic scintillator in crystal form as a possible alternative to high-luminescence but hygroscopic cerium bromide (CeBr3). The experiments w
Externí odkaz:
https://doaj.org/article/eef72f28688b40a683563021d44a53a1
Publikováno v:
Crystals, Vol 14, Iss 5, p 416 (2024)
Cone-beam computed tomography (CBCT) has emerged in recent years as an adequate alternative to mammography and tomosynthesis due to the several advantages over traditional mammography, including its ability to provide 3D images, its reduced radiation
Externí odkaz:
https://doaj.org/article/b500aab8beb64822ae62a16592c17076
Autor:
Marios K. Tzomakas, Vasiliki Peppa, Antigoni Alexiou, Georgios Karakatsanis, Anastasios Episkopakis, Christos Michail, Ioannis Valais, George Fountos, Nektarios Kalyvas, Ioannis S. Kandarakis
Publikováno v:
Heliyon, Vol 9, Iss 10, Pp e21116- (2023)
Purpose: In this study an evaluation of the imaging performance of an electronic portal imaging device (EPID) is presented. The evaluation performed employing the QC-3V image quality phantom. Methods: An EPID system of a 6 MV LINAC, was used to obtai
Externí odkaz:
https://doaj.org/article/a125ebe65e764aad844b6ca96f242927
Autor:
Christos Michail, Panagiotis Liaparinos, Nektarios Kalyvas, Ioannis Kandarakis, George Fountos, Ioannis Valais
Publikováno v:
Crystals, Vol 14, Iss 2, p 169 (2024)
Medical imaging instrumentation is mostly based on the use of luminescent materials coupled to optical sensors. These materials are employed in the form of granular screens, structured crystals, single transparent crystals, ceramics, etc. Storage pho
Externí odkaz:
https://doaj.org/article/541bd188bec44703ba89b957398fc563
Autor:
Stavros Tseremoglou, Christos Michail, Ioannis Valais, Konstantinos Ninos, Athanasios Bakas, Ioannis Kandarakis, George Fountos, Nektarios Kalyvas
Publikováno v:
Crystals, Vol 14, Iss 1, p 24 (2023)
The present study focuses on the determination of the optimal crystal thickness of LaCl3:Ce and LaBr3:Ce crystal scintillators for Nuclear Medicine Imaging applications. A theoretical model was applied for the estimation of the optical efficiency of
Externí odkaz:
https://doaj.org/article/04eb5fd6cafe4142ad0364c39766439b
Publikováno v:
Sensors, Vol 23, Iss 14, p 6588 (2023)
Scintillating screens for X-ray imaging applications are prepared with various methods. Among them, the classic sedimentation method presents certain weak points. In this context, a novel fabrication process was developed that offers simplicity, econ
Externí odkaz:
https://doaj.org/article/e95b0bcb522141dfbd295ec3cccfc8f2
Autor:
Nektarios Kalyvas, Anastasia Chamogeorgaki, Christos Michail, Aikaterini Skouroliakou, Panagiotis Liaparinos, Ioannis Valais, George Fountos, Ioannis Kandarakis
Publikováno v:
Sensors, Vol 23, Iss 4, p 2335 (2023)
Background: Mammographic digital imaging is based on X-ray sensors with solid image quality characteristics. These primarily include (a) a response curve that yields high contrast and image latitude, (b) a frequency response given by the Modulation T
Externí odkaz:
https://doaj.org/article/fe0e749c2d8d47c28155155fa3ca4149
Autor:
Vasileios Ntoupis, Dionysios Linardatos, George Saatsakis, Nektarios Kalyvas, Athanasios Bakas, George Fountos, Ioannis Kandarakis, Christos Michail, Ioannis Valais
Publikováno v:
Photonics, Vol 10, Iss 1, p 57 (2023)
Background: In this research, the response of a 10 × 10 × 10 mm3 commercially available PbF2 crystal was experimentally assessed under X-ray and gamma ray radiation to verify the possible application of this material in X-ray medical imaging. Metho
Externí odkaz:
https://doaj.org/article/8fb524b9b41b4547b92a599b9cd984ef
Autor:
Stavros Tseremoglou, Christos Michail, Ioannis Valais, Konstantinos Ninos, Athanasios Bakas, Ioannis Kandarakis, George Fountos, Nektarios Kalyvas
Publikováno v:
Applied Sciences, Vol 13, Iss 1, p 419 (2022)
In the present study, the response of the crystalline scintillator LaBr3:Ce when excited with X-rays at tube voltages from 50 kVp to 150 kVp was investigated, for possible use in hybrid medical-imaging systems. A single crystal (10 × 10 × 10 mm3) w
Externí odkaz:
https://doaj.org/article/f6f4cbdc84054cb1a6765a6871e5f5a1