Pub Date : 2016-10-01DOI: 10.1109/NSSMIC.2016.8069771
M. Biroth, P. Achenbach, W. Lauth, Andreas Thomas
The C-Series of silicon photomultipliers (SiPM) from SensL provides devices with a fast response and high performance at low cost. The device's ability to detect light at temperatures of liquid nitrogen (77K) and liquid helium (4 K) with high photoelectron resolution was demonstrated. Results include relative photon detection efficiency (PDE), gain, microcell capacitance, and cross-talk probability at different over-voltages, both at room and at cryogenic temperatures. At 77K the SiPM demonstrated significantly improved operating characteristics while at 4K the observed increase in break-down voltage, the reduction of PDE by a factor of 2-3, and the extensively dropped microcell capacitance degraded the performance.
{"title":"Performance of sensl C-Series SiPM with high photoelectron resolution at cryogenic temperatures","authors":"M. Biroth, P. Achenbach, W. Lauth, Andreas Thomas","doi":"10.1109/NSSMIC.2016.8069771","DOIUrl":"https://doi.org/10.1109/NSSMIC.2016.8069771","url":null,"abstract":"The C-Series of silicon photomultipliers (SiPM) from SensL provides devices with a fast response and high performance at low cost. The device's ability to detect light at temperatures of liquid nitrogen (77K) and liquid helium (4 K) with high photoelectron resolution was demonstrated. Results include relative photon detection efficiency (PDE), gain, microcell capacitance, and cross-talk probability at different over-voltages, both at room and at cryogenic temperatures. At 77K the SiPM demonstrated significantly improved operating characteristics while at 4K the observed increase in break-down voltage, the reduction of PDE by a factor of 2-3, and the extensively dropped microcell capacitance degraded the performance.","PeriodicalId":184587,"journal":{"name":"2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130452019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/NSSMIC.2016.8069710
A. Ohzu, M. Maeda, M. Komeda, H. Tobita, M. Kureta, M. Koizumi, M. Seya
A specific Differential Die-away Analysis (DDA) system in an advanced non-destructive analysis (NDA) system using a compact pulsed neutron generator has been studied and designed for non-nuclear proliferation in the Japan Atomic Energy Agency (JAEA). The NDA system is composed mainly of combination of four active neutron analysis techniques, DDA, PGA (Prompt Gamma-ray Analysis), NRTA (Neutron Resonance Transmission Analysis) and DGS (Delayed Gamma Spectroscopy). The design study on the DDA section in the system has been performed with Monte Carlo simulation code (MCNP) to evaluate the performance of the DDA system. The simulation result shows that the 239Pu mass (contained in MOX fuel) of as low as 0.01 g is detectable. The dependence of the performance on the type of the inner wall material in the DDA section and the thickness of the cylindrical moderator placed to circumscribe the measurement sample are presented.
{"title":"Design study on differential die-away technique in an integrated active neutron NDA system for non-nuclear proliferation","authors":"A. Ohzu, M. Maeda, M. Komeda, H. Tobita, M. Kureta, M. Koizumi, M. Seya","doi":"10.1109/NSSMIC.2016.8069710","DOIUrl":"https://doi.org/10.1109/NSSMIC.2016.8069710","url":null,"abstract":"A specific Differential Die-away Analysis (DDA) system in an advanced non-destructive analysis (NDA) system using a compact pulsed neutron generator has been studied and designed for non-nuclear proliferation in the Japan Atomic Energy Agency (JAEA). The NDA system is composed mainly of combination of four active neutron analysis techniques, DDA, PGA (Prompt Gamma-ray Analysis), NRTA (Neutron Resonance Transmission Analysis) and DGS (Delayed Gamma Spectroscopy). The design study on the DDA section in the system has been performed with Monte Carlo simulation code (MCNP) to evaluate the performance of the DDA system. The simulation result shows that the 239Pu mass (contained in MOX fuel) of as low as 0.01 g is detectable. The dependence of the performance on the type of the inner wall material in the DDA section and the thickness of the cylindrical moderator placed to circumscribe the measurement sample are presented.","PeriodicalId":184587,"journal":{"name":"2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134224276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/NSSMIC.2016.8069511
Y. Shang, Shuai Wang, Wencai Cao, Hao Xu, Yuqing Liu, Q. Xie, P. Xiao
Measuring system response matrix (SRM) by Monte Carlo method is time and resource consuming, even with high performance computer nodes. In this paper, we exploited symmetry properties available to drastically reduce the complexity in computing SRM of panel PET, which has two parallel panel detectors. By extending the original system and simulating 4 voxels every slice parallel to the PET detector, SRM of other voxels on the same image slice can be obtained by symmetry and translation. Without loss of generality, the voxel size in Y and Z direction is one-quarter of the crystal pitch size respectively, and they may not be the same. The results show that the noise level and convergence of reconstruction images by Monte Carlo method and symmetry are better than that by calculating SRM on-the-fly like solid angle.
{"title":"The dual head panel PET image reconstruction based on simulated system response matrix","authors":"Y. Shang, Shuai Wang, Wencai Cao, Hao Xu, Yuqing Liu, Q. Xie, P. Xiao","doi":"10.1109/NSSMIC.2016.8069511","DOIUrl":"https://doi.org/10.1109/NSSMIC.2016.8069511","url":null,"abstract":"Measuring system response matrix (SRM) by Monte Carlo method is time and resource consuming, even with high performance computer nodes. In this paper, we exploited symmetry properties available to drastically reduce the complexity in computing SRM of panel PET, which has two parallel panel detectors. By extending the original system and simulating 4 voxels every slice parallel to the PET detector, SRM of other voxels on the same image slice can be obtained by symmetry and translation. Without loss of generality, the voxel size in Y and Z direction is one-quarter of the crystal pitch size respectively, and they may not be the same. The results show that the noise level and convergence of reconstruction images by Monte Carlo method and symmetry are better than that by calculating SRM on-the-fly like solid angle.","PeriodicalId":184587,"journal":{"name":"2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134172508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/NSSMIC.2016.8069903
R. Schimassek, F. Ehrler, I. Perić
High-Voltage CMOS (HVCMOS) pixel sensors are depleted active pixel sensors implemented in standard commercial CMOS processes. HVCMOS pixel sensors will be used, or are proposed, for several experiments: Mu3e, ATLAS, CLIC. Thanks to charge collection with a high electric field, HVCMOS sensors have potentially a very high time resolution. The time resolution is limited by the rise time of the amplifier. In this article, means for enhancement of time resolution are described: A compensation method shifting the detection time depending on the signal height, an enhanced comparator — the time walk compensating comparator — and the sampling of the signal.
{"title":"HVCMOS pixel detectors — methods for enhancement of time resolution","authors":"R. Schimassek, F. Ehrler, I. Perić","doi":"10.1109/NSSMIC.2016.8069903","DOIUrl":"https://doi.org/10.1109/NSSMIC.2016.8069903","url":null,"abstract":"High-Voltage CMOS (HVCMOS) pixel sensors are depleted active pixel sensors implemented in standard commercial CMOS processes. HVCMOS pixel sensors will be used, or are proposed, for several experiments: Mu3e, ATLAS, CLIC. Thanks to charge collection with a high electric field, HVCMOS sensors have potentially a very high time resolution. The time resolution is limited by the rise time of the amplifier. In this article, means for enhancement of time resolution are described: A compensation method shifting the detection time depending on the signal height, an enhanced comparator — the time walk compensating comparator — and the sampling of the signal.","PeriodicalId":184587,"journal":{"name":"2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131565108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/NSSMIC.2016.8069526
A. Ahmed, H. Tashima, E. Yoshida, T. Yamaya
High sensitivity, high spatial resolution and low cost dedicated brain PET scanners are required for early diagnosis of Alzheimer's disease and brain function studies. As an optimal geometry, we proposed and developed the first prototype of the helmet-chin PET scanner. The scanner was constructed from 4-layer DOI detectors constructed from GSO crystals which were originally developed for our OpenPET. The helmet part of the helmet-chin PET consisted of three ring detectors with different radii arranged on a surface of a hemisphere and a top cover. In this study, for our next development, we optimized the size of the detectors to be arranged on the helmet, and compared two types of geometrical arrangements of the detectors on the hemisphere: a spherical arrangement in which the center of each detector faces toward the center of the hemisphere, and a multi-ring arrangement which has a similar detector arrangement to that of the first prototype. Geant4 simulation toolkit was used to model the scanners. The simulated scanners were constructed from LYSO crystals with a size of 1 × 1 × 5 mm3 (transaxial × axial × DOI). A dead-space of 2 mm was assumed in the axial and transaxial directions of the detector such as for wrapping. While fixing the number of the DOI layers to 4, the size of the detectors was varied by changing the number of crystals in the transaxial and axial directions. The results showed that, for the helmet detector, a detector with a size of 42 × 42 × 20 mm3 had the highest sensitivity evaluated using a hemispherical phantom. Then, the helmet-chin PET was modeled based on a detector whose size is 42 × 42 × 20 mm3 with the two geometrical arrangements and their sensitivities were compared. The respective sensitivities for hemispherical and multi-ring arrangements were 3.4% and 2.9% for a hemispherical phantom.
{"title":"Detector size and geometry optimization for the helmet-chin PET","authors":"A. Ahmed, H. Tashima, E. Yoshida, T. Yamaya","doi":"10.1109/NSSMIC.2016.8069526","DOIUrl":"https://doi.org/10.1109/NSSMIC.2016.8069526","url":null,"abstract":"High sensitivity, high spatial resolution and low cost dedicated brain PET scanners are required for early diagnosis of Alzheimer's disease and brain function studies. As an optimal geometry, we proposed and developed the first prototype of the helmet-chin PET scanner. The scanner was constructed from 4-layer DOI detectors constructed from GSO crystals which were originally developed for our OpenPET. The helmet part of the helmet-chin PET consisted of three ring detectors with different radii arranged on a surface of a hemisphere and a top cover. In this study, for our next development, we optimized the size of the detectors to be arranged on the helmet, and compared two types of geometrical arrangements of the detectors on the hemisphere: a spherical arrangement in which the center of each detector faces toward the center of the hemisphere, and a multi-ring arrangement which has a similar detector arrangement to that of the first prototype. Geant4 simulation toolkit was used to model the scanners. The simulated scanners were constructed from LYSO crystals with a size of 1 × 1 × 5 mm3 (transaxial × axial × DOI). A dead-space of 2 mm was assumed in the axial and transaxial directions of the detector such as for wrapping. While fixing the number of the DOI layers to 4, the size of the detectors was varied by changing the number of crystals in the transaxial and axial directions. The results showed that, for the helmet detector, a detector with a size of 42 × 42 × 20 mm3 had the highest sensitivity evaluated using a hemispherical phantom. Then, the helmet-chin PET was modeled based on a detector whose size is 42 × 42 × 20 mm3 with the two geometrical arrangements and their sensitivities were compared. The respective sensitivities for hemispherical and multi-ring arrangements were 3.4% and 2.9% for a hemispherical phantom.","PeriodicalId":184587,"journal":{"name":"2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)","volume":"248 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131600519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/NSSMIC.2016.8069762
Yudong Li, C. Veerappan, Myung-Jae Lee, L. Wen, Qi Guo, E. Charbon
We investigate the radiation effects on single-photon avalanche diodes (SPADs) fabricated in CMOS technology. For this investigation, a high-performance SPAD based on a vertical p-i-n construction with buried-N layer is proposed and used for the characterization. It retains good performance in terms of dark counts and photon detection probability upon irradiation doses from 10k Rad(Si) to 50k Rad(Si), with a slight increase of dark count rates and stable dark current, breakdown voltage, and sensitivity. This feature makes our device especially suitable to be integrated in SiPMs for applications in radiation-rich environments, where high radiation tolerance and low noise are essential.
{"title":"A Radiation-Tolerant, high performance SPAD for SiPMs implemented in CMOS technology","authors":"Yudong Li, C. Veerappan, Myung-Jae Lee, L. Wen, Qi Guo, E. Charbon","doi":"10.1109/NSSMIC.2016.8069762","DOIUrl":"https://doi.org/10.1109/NSSMIC.2016.8069762","url":null,"abstract":"We investigate the radiation effects on single-photon avalanche diodes (SPADs) fabricated in CMOS technology. For this investigation, a high-performance SPAD based on a vertical p-i-n construction with buried-N layer is proposed and used for the characterization. It retains good performance in terms of dark counts and photon detection probability upon irradiation doses from 10k Rad(Si) to 50k Rad(Si), with a slight increase of dark count rates and stable dark current, breakdown voltage, and sensitivity. This feature makes our device especially suitable to be integrated in SiPMs for applications in radiation-rich environments, where high radiation tolerance and low noise are essential.","PeriodicalId":184587,"journal":{"name":"2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131786032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/NSSMIC.2016.8069648
A. Grande, C. Fiorini, F. Erdinger, P. Fischer, M. Porro
In this work we present the study and the experimental results on two different front-end stages for the MiniSDD pixel sensors of the DSSC detector for photon science applications at the European XFEL GmbH in Hamburg. The detector must be able to cope with an image frame rate up to 4.5 MHz and must achieve a dynamic range up to 104 photons/pixel/pulse with a photon energy of 1 keV. In order to achieve this high dynamic range and single photon sensitivity at the same time, the front-end must provide a non-linear amplification. The non-linear response is obtained with a simple circuit that pushes the input PMOSFET into triode region as the input signal increases. Since the readout ASIC has more than 4000 channels operating in parallel, particular care was devoted to the homogeneity and the robustness of the implemented solution, especially with respect to power supply rejection ratio and the cross talk among channels.
{"title":"Study of PMOS front-end solution with signal compression for XFEL MiniSDD X-ray detectors","authors":"A. Grande, C. Fiorini, F. Erdinger, P. Fischer, M. Porro","doi":"10.1109/NSSMIC.2016.8069648","DOIUrl":"https://doi.org/10.1109/NSSMIC.2016.8069648","url":null,"abstract":"In this work we present the study and the experimental results on two different front-end stages for the MiniSDD pixel sensors of the DSSC detector for photon science applications at the European XFEL GmbH in Hamburg. The detector must be able to cope with an image frame rate up to 4.5 MHz and must achieve a dynamic range up to 104 photons/pixel/pulse with a photon energy of 1 keV. In order to achieve this high dynamic range and single photon sensitivity at the same time, the front-end must provide a non-linear amplification. The non-linear response is obtained with a simple circuit that pushes the input PMOSFET into triode region as the input signal increases. Since the readout ASIC has more than 4000 channels operating in parallel, particular care was devoted to the homogeneity and the robustness of the implemented solution, especially with respect to power supply rejection ratio and the cross talk among channels.","PeriodicalId":184587,"journal":{"name":"2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130715565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/NSSMIC.2016.8069590
D. Zeng, Z. Bian, Jing Huang, Yuting Liao, Jing Wang, Zhengrong Liang, Jianhua Ma
Dual energy computed tomography (DECT) has improved capability of differentiating different materials compared to conventional CT. However, due to non-negligible radiation exposure to patients, dose reduction has recently become a critical concern in CT imaging field. Moreover, direct material decomposition techniques such as numerical inversion can yield significantly amplified noise in the basic material images, and this is another common tissue in DECT imaging. In this work, to address the two issues, we present an iterative algorithm. More specifically, the DECT images are reconstructed by minimizing one objective function consisting a data-fidelity term using Alpha-divergence to describe the statistical distribution of the DE sinogram data and a regularization term utilizing redundant information within DECT images. For simplicity, the present algorithm is termed as “AlphaD-aviNLM”. To minimize the associative objective function, a modified proximal forward-backward splitting algorithm is proposed. Digital phantom was utilized to validate and evaluate the present AlphaD-aviNLM algorithm. The experimental results characterize the performance of the present AlphaD-aviNLM algorithm.
{"title":"Statistical image reconstruction for low-dose dual energy CT using alpha-divergence constrained spectral redundancy information","authors":"D. Zeng, Z. Bian, Jing Huang, Yuting Liao, Jing Wang, Zhengrong Liang, Jianhua Ma","doi":"10.1109/NSSMIC.2016.8069590","DOIUrl":"https://doi.org/10.1109/NSSMIC.2016.8069590","url":null,"abstract":"Dual energy computed tomography (DECT) has improved capability of differentiating different materials compared to conventional CT. However, due to non-negligible radiation exposure to patients, dose reduction has recently become a critical concern in CT imaging field. Moreover, direct material decomposition techniques such as numerical inversion can yield significantly amplified noise in the basic material images, and this is another common tissue in DECT imaging. In this work, to address the two issues, we present an iterative algorithm. More specifically, the DECT images are reconstructed by minimizing one objective function consisting a data-fidelity term using Alpha-divergence to describe the statistical distribution of the DE sinogram data and a regularization term utilizing redundant information within DECT images. For simplicity, the present algorithm is termed as “AlphaD-aviNLM”. To minimize the associative objective function, a modified proximal forward-backward splitting algorithm is proposed. Digital phantom was utilized to validate and evaluate the present AlphaD-aviNLM algorithm. The experimental results characterize the performance of the present AlphaD-aviNLM algorithm.","PeriodicalId":184587,"journal":{"name":"2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133265332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/NSSMIC.2016.8069433
F. Segovia, Ignacio Álvarez Illán, D. Salas-González, Francisco J. Martínez-Murcia, A. Ortiz, J. Górriz, J. Ramírez
This paper presents PETRA, a Web-based system to assist practitioners in the diagnosis of Alzheimer's Disease (AD). Particularly, it provides with online tools to carry out multiple advanced analysis on T1 Magnetic Resonance Images (MRI) and Positron Emission Tomographies (PET). The key innovation behind PETRA is that it enables anywhere, anytime access to advanced neuroimaging tools, which previously required specialized machines with high computational resources. Specifically, PETRA allows to automatically segment tissue, white matter, grey matter and cerebro-spinal fluid; to visualize, manipulate and compare MRIs, PETs and already-segmented neuroimages; to manage large sets of images in a simple manner; and to perform an automatized pre-diagnosis through the application of different classification techniques.
{"title":"PETRA: A web-based system supporting computer aided diagnosis of alzheimer's disease","authors":"F. Segovia, Ignacio Álvarez Illán, D. Salas-González, Francisco J. Martínez-Murcia, A. Ortiz, J. Górriz, J. Ramírez","doi":"10.1109/NSSMIC.2016.8069433","DOIUrl":"https://doi.org/10.1109/NSSMIC.2016.8069433","url":null,"abstract":"This paper presents PETRA, a Web-based system to assist practitioners in the diagnosis of Alzheimer's Disease (AD). Particularly, it provides with online tools to carry out multiple advanced analysis on T1 Magnetic Resonance Images (MRI) and Positron Emission Tomographies (PET). The key innovation behind PETRA is that it enables anywhere, anytime access to advanced neuroimaging tools, which previously required specialized machines with high computational resources. Specifically, PETRA allows to automatically segment tissue, white matter, grey matter and cerebro-spinal fluid; to visualize, manipulate and compare MRIs, PETs and already-segmented neuroimages; to manage large sets of images in a simple manner; and to perform an automatized pre-diagnosis through the application of different classification techniques.","PeriodicalId":184587,"journal":{"name":"2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132763788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/NSSMIC.2016.8069890
L. Bosisio, C. Licata, L. Lanceri, L. Vitale
The Belle-II VerteX Detector (VXD) is a 6 layers silicon tracker device that will cope with an unprecedented luminosity of 8 × 1035 cm−2 s−1 achievable by the new SuperKEKB e+e− collider, now under commissioning at the KEK laboratory (Tsukuba, Japan). A radiation monitoring and beam abort system has been developed based on single-crystal s-CVD diamond sensors. The sensors will be placed in 20 key positions in the vicinity of the interaction region. The severe space limitations require a remote readout of the sensors. In this contribution we present the system design, along with the sensor characterisation procedure. We present also the preliminary results with the prototype system during the first SuperKEKB commissioning phase in February-June 2016.
{"title":"The s-CVD radiation monitoring and beam abort system of the Belle-II vertex detector","authors":"L. Bosisio, C. Licata, L. Lanceri, L. Vitale","doi":"10.1109/NSSMIC.2016.8069890","DOIUrl":"https://doi.org/10.1109/NSSMIC.2016.8069890","url":null,"abstract":"The Belle-II VerteX Detector (VXD) is a 6 layers silicon tracker device that will cope with an unprecedented luminosity of 8 × 10<sup>35</sup> cm<sup>−2</sup> s<sup>−1</sup> achievable by the new SuperKEKB e<sup>+</sup>e<sup>−</sup> collider, now under commissioning at the KEK laboratory (Tsukuba, Japan). A radiation monitoring and beam abort system has been developed based on single-crystal s-CVD diamond sensors. The sensors will be placed in 20 key positions in the vicinity of the interaction region. The severe space limitations require a remote readout of the sensors. In this contribution we present the system design, along with the sensor characterisation procedure. We present also the preliminary results with the prototype system during the first SuperKEKB commissioning phase in February-June 2016.","PeriodicalId":184587,"journal":{"name":"2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134500462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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