2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)最新文献_第5页

Development of Advanced Silicon 3D Sensors at FBK Using Stepper Lithography 采用步进光刻技术在FBK上开发先进的硅三维传感器

2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2020-10-31 DOI: 10.1109/NSS/MIC42677.2020.9508081

M. Boscardin, F. Ficorella, S. Ronchin, S. Ferrari, R. Mendicino, A. Lai, M. Meschini, Md. Arif Abdulla Samy, G. Betta

引用次数: 0

TOFHIR2: The readout ASIC of the CMS Barrel MIP Timing Detector TOFHIR2: CMS桶状MIP定时检测器的读出专用集成电路

2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2020-10-31 DOI: 10.1109/NSS/MIC42677.2020.9507749

E. Albuquerque, R. Bugalho, V. Dubceac, L. Ferramacho, H. França, M. Firlej, T. Fiutowski, M. Gallinaro, M. Idzik, J. Moroń, T. Niknejad, L. Oliveira, R. Francisco, J. C. Silva, R. Silva, M. Silveira, K. Swientek, J. Varela

引用次数: 6

Optimizing the Position of Inorganic Scintillators in a Handheld Dual Particle Imager 手持式双粒子成像仪中无机闪烁体位置的优化

2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2020-10-31 DOI: 10.1109/NSS/MIC42677.2020.9508098

W. Steinberger, N. Giha, P. Marleau, S. Clarke, S. Pozzi

{"title":"Optimizing the Position of Inorganic Scintillators in a Handheld Dual Particle Imager","authors":"W. Steinberger, N. Giha, P. Marleau, S. Clarke, S. Pozzi","doi":"10.1109/NSS/MIC42677.2020.9508098","DOIUrl":"https://doi.org/10.1109/NSS/MIC42677.2020.9508098","url":null,"abstract":"This work details an optimization process for incorporating inorganic scintillators into a stilbene-based handheld dual particle imager (H2DPI). A prototype H2DPI composed of eight stilbene pillars with dimensions of 6 x 6 x 50.5 mm3 coupled to silicon photomultipliers has been built and is capable of imaging both neutrons and gamma rays emitted by special nuclear material. Gamma-ray imaging with the prototype was performed using an approximate Compton imaging method due to lack of photoelectric absorption of gamma rays in stilbene. Incorporation of inorganic scintillators significantly increases the probability of photoelectric absorption, allowing for Compton imaging. Simulations were made for several geometries where the placement of CeBr3 scintillators was varied to analyze how the system geometry impacts the image quality of simulated measurements. These were compared to a step function using a structural similarity index to determine which system geometry produced the optimal images. It was found that placing the CeBr3 scintillators in the corners of the system produced the best gamma-ray images while maintaining high neutron double-scatter efficiency.","PeriodicalId":6760,"journal":{"name":"2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"221 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76642720","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}

引用次数: 1

Solar Photovoltaic Devices as Radiation Sensors for Post-detonation Nuclear Forensics 太阳能光伏装置作为爆炸后核取证的辐射传感器

2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2020-10-31 DOI: 10.1109/NSS/MIC42677.2020.9507766

P. Kandlakunta, L. Pan, L. Cao, M. Van Zile, Xuezeng Dai, Jinsong Huang, J. McClory

{"title":"Solar Photovoltaic Devices as Radiation Sensors for Post-detonation Nuclear Forensics","authors":"P. Kandlakunta, L. Pan, L. Cao, M. Van Zile, Xuezeng Dai, Jinsong Huang, J. McClory","doi":"10.1109/NSS/MIC42677.2020.9507766","DOIUrl":"https://doi.org/10.1109/NSS/MIC42677.2020.9507766","url":null,"abstract":"In this study, we evaluated the feasibility of applying solar photovoltaic (PV) panels as sensors of nuclear and electromagnetic radiation that includes neutrons, x-rays and gamma-rays, and optical radiation emanating from a nuclear explosion. We investigated the steady-state and transient response of both a commercial silicon (Si) and a perovskite solar cell to different radiation types. Solar cell current-voltage characteristics and short-circuit current (Isc) response under steady-state x-ray illumination were measured. The fast transient radiation pulse from a nuclear detonation was mimicked by using a fast switching, nanosecond pulsed laser source and the transient response of the solar cells was captured on an oscilloscope. Subsequently, the transient response of Si solar cells to pulsed x-rays generated by a mechanical x-ray chopper was measured. A 2 MeV neutron beam chopper was built at the fast neutron beam facility of a research reactor to produce time-modulated neutrons and evaluate the solar cell transient response to a neutron pulse. Our steady-state measurements demonstrated good response of solar cells to x-rays and neutrons. The pulsed radiation measurements indicated that the solar cells are able to detect a fast transient radiation and produce a proportional measurable output signature.","PeriodicalId":6760,"journal":{"name":"2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"70 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76936041","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}

引用次数: 0

Influence of pulse pile-up effects on material decomposition with photon-counting CT 脉冲堆积效应对光子计数CT材料分解的影响

2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2020-10-31 DOI: 10.1109/NSS/MIC42677.2020.9507751

K. Murata, K. Ogawa

{"title":"Influence of pulse pile-up effects on material decomposition with photon-counting CT","authors":"K. Murata, K. Ogawa","doi":"10.1109/NSS/MIC42677.2020.9507751","DOIUrl":"https://doi.org/10.1109/NSS/MIC42677.2020.9507751","url":null,"abstract":"The aim of this study is to reveal an influence of pulse pile-up effects on material decomposition with a photon-counting CT system. The photon-counting CT has great advantages compared with a conventional system. Among them we focused on the ability of a material decomposition. However, a photon-counting CT system also has many issues to be solved. The most serious problem is a pulse pile-up effect. When multiple X-ray photons are simultaneously incident on a detector, the recorded spectrum is distorted. It should significantly degrade the material decomposition accuracy. Hence, we investigated influence of the pile-up effect on material decomposition, and feasibility of a spectral distortion-correction method. Using an analytical pile-up model, we performed simulations and found that accuracy of material-density measurements decreased with increasing X-ray intensity. We also found that spectral distortion could not be negligible even in case of impractically low x-ray intensity for an accurate density measurement of low concentration solution, suggesting a requirement of spectral distortion correction. Hence, we provided a correction method based on a least square method. In a simulation, our method successfully corrected the spectral distortion even in case of wide energy windows. The remained uncertainty was less than a few percent for a moderate X-ray intensity.","PeriodicalId":6760,"journal":{"name":"2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"13 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78211155","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}

引用次数: 1

Recent Results from the First lpGBT-based Prototype of the End-of-Substructure Card for the ATLAS ITk Strip Detector ATLAS ITk条探测器首个基于lgbgb的子结构末端卡原型的最新结果

2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2020-10-31 DOI: 10.1109/NSS/MIC42677.2020.9507943

A. Boebel, H. Ceslik, Helmut Colbow, M. Dam, S. Díez, I. Gregor, P. Göttlicher, J. Keaveney, Joash Nicholas Naidoo, M. N. van der Merwe, J. Oechsle, S. Schmitt, M. Stanitzki, R. Ström, C. Wanotayaroj, J. Wyngaard

{"title":"Recent Results from the First lpGBT-based Prototype of the End-of-Substructure Card for the ATLAS ITk Strip Detector","authors":"A. Boebel, H. Ceslik, Helmut Colbow, M. Dam, S. Díez, I. Gregor, P. Göttlicher, J. Keaveney, Joash Nicholas Naidoo, M. N. van der Merwe, J. Oechsle, S. Schmitt, M. Stanitzki, R. Ström, C. Wanotayaroj, J. Wyngaard","doi":"10.1109/NSS/MIC42677.2020.9507943","DOIUrl":"https://doi.org/10.1109/NSS/MIC42677.2020.9507943","url":null,"abstract":"The main building blocks of the ATLAS Inner Tracker (ITk) Strip Detector, to be installed for the High-Luminosity Upgrade of the Large Hadron Collider (HL-LHC), are modules that host sensors and front-end ASICs. Carbon-fibre substructures provide mechanical support to up to 14 modules per side. An End-of-Substructure (EoS) card on each substructure side connects up to 28 differential data lines at 640 Mbit/s from the module to low-powered GigaBit Transceivers (lpGBT) ASICs for data serialisation and uses 10 GBit/s optical links to transmit signals to the off-detector systems via the Versatile Link PLUS (VL+) transceiver module, VTRx+. Prototype EoS cards have been designed and extensively tested using lpGBT and VTRx+ prototypes. The status of the electronics design and recent results of tests of electrical and data processing performance based on these prototypes are presented.","PeriodicalId":6760,"journal":{"name":"2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"33 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75391749","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}

引用次数: 1

Light Extraction Enhancement Techniques for Inorganic Scintillators 无机闪烁体的光萃取增强技术

2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2020-10-31 DOI: 10.20944/PREPRINTS202103.0157.V1

F. Gramuglia, S. Frasca, E. Ripiccini, E. Venialgo, V. Gâté, H. Kadiri, N. Descharmes, D. Turover, E. Charbon, C. Bruschini

{"title":"Light Extraction Enhancement Techniques for Inorganic Scintillators","authors":"F. Gramuglia, S. Frasca, E. Ripiccini, E. Venialgo, V. Gâté, H. Kadiri, N. Descharmes, D. Turover, E. Charbon, C. Bruschini","doi":"10.20944/PREPRINTS202103.0157.V1","DOIUrl":"https://doi.org/10.20944/PREPRINTS202103.0157.V1","url":null,"abstract":"In several applications which rely on the use of ionizing radiation, scintillators play an important role in the detection chain. An efficient extraction and detection of the generated light is mandatory to provide sufficient information on the high energy particles interacting with the crystal itself. The amount of light extracted, as well as its temporal distribution, have a direct impact on the overall system performance. In positron emission tomography (PET), energy resolution and coincidence resolving time are two of the main parameters, which both depend on the amount of detected light. Furthermore, if pixelated crystals with sub-millimiter pitch are needed, such as in preclinical PET scanners, the use of conventional reflectors on the crystal pixel surface implies a dramatic reduction of the packing fraction, due to their thickness. In this work several light extraction techniques for the most used inorganic scintillators are presented and compared. A novel approach, using a combination of distributed Bragg reflectors, metal coatings, and photonic crystals, is also introduced. A maximum gain of ~40% on light extraction and ~18% on energy resolution was observed.","PeriodicalId":6760,"journal":{"name":"2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"40 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77859350","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}

引用次数: 6

The Role of Dynamic 11C-Acetate PET imaging in Early Detection of Response to Radiotherapy Treatment 动态11c -醋酸PET显像在早期发现放疗反应中的作用

2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2020-10-31 DOI: 10.1109/NSS/MIC42677.2020.9508103

Redha-alla Abdo, Chang-Shu Wang, É. Lavallée, F. Lessard, M. Bentourkia

{"title":"The Role of Dynamic 11C-Acetate PET imaging in Early Detection of Response to Radiotherapy Treatment","authors":"Redha-alla Abdo, Chang-Shu Wang, É. Lavallée, F. Lessard, M. Bentourkia","doi":"10.1109/NSS/MIC42677.2020.9508103","DOIUrl":"https://doi.org/10.1109/NSS/MIC42677.2020.9508103","url":null,"abstract":"Positron Emission Tomography (PET) imaging with 11C-Acetate (ACE) is regularly used in cardiovascular and in cancer imaging. In the earlier stages of ACE developments, it has been mainly used for hepatocellular carcinoma, prostate cancer, and myocardial oxygen consumption. The previous studies compared the advantage of ACE with 18F-Fluorodeoxyglucose (18F-FDG) imaging using Standard Uptake Value (SUV) and the tissue-to-blood ratio (TBR) method. The current study proposes the application of dynamic ACE PET imaging in monitoring the early response to cancer treatment. We conducted two dynamic ACE PET scans on two patients suffering from Head and Neck Cancer (HNC) (Squamous Cell Carcinoma) in the base of the tongue. Pre-treatment dynamic ACE and static 18F-FDG PET were conducted before initiation of the treatment, and the second ACE dynamic scan was performed after four weeks of radiotherapy (after 35 Gy). We applied the two-tissue compartment model to represent the kinetics of ACE in HNC. The results showed a reduction in tumor volume by more than 50% compared to the initial volume in patient-1. Besides, patient-2 has displayed a more reduced tumor volume after 4 weeks of treatment. Compartmental modeling parameter k2 increased after radiotherapy dose in both patients. This increase of k2 could reflect the reoxygenation process inside the tumor, and it can reflect the early treatment response. In conclusion, ACE could predict the early changes in the tumor perfusion and the oxidative metabolism to optimally adjust the treatment.","PeriodicalId":6760,"journal":{"name":"2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"44 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74781254","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}

引用次数: 0

Measurement results for the ASoC V3: A High Performance Waveform Digitizer System-on-Chip ASoC V3:一种高性能波形数字化仪片上系统的测量结果

2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2020-10-31 DOI: 10.1109/NSS/MIC42677.2020.9507893

I. Mostafanezhad, L. Macchiarulo, G. Varner, B. Rotter, D. Uehara, C. Chock

引用次数: 1

Direct Dual Energy CT Material Decomposition Using Noise2Noise Prior 基于Noise2Noise先验的直接双能量CT材料分解

2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2020-10-31 DOI: 10.1109/NSS/MIC42677.2020.9508021

Wei Fang, Dufan Wu, Kyungsang Kim, Ramandeep Singh, M. Kalra, Liang Li, Quanzheng Li

{"title":"Direct Dual Energy CT Material Decomposition Using Noise2Noise Prior","authors":"Wei Fang, Dufan Wu, Kyungsang Kim, Ramandeep Singh, M. Kalra, Liang Li, Quanzheng Li","doi":"10.1109/NSS/MIC42677.2020.9508021","DOIUrl":"https://doi.org/10.1109/NSS/MIC42677.2020.9508021","url":null,"abstract":"Dual energy computed tomography (DECT) can provide material decomposition capability, which can be useful for many clinical diagnosis applications. But the decomposed images can be very noisy due to the dose limit in the scanning and the ill-condition of decomposition process. Recently Noise2Noise framework shows its potential on restoring images by using only noisy data. Inspired by this, we proposed an iterative DECT reconstruction algorithm with a Noise2Noise prior. The algorithm directly estimates material images from projection data and thus can significantly reduce possible bias which may occur in other post-smoothen methods. The Noise2Noise prior was built by a deep neural network, which did NOT need external data for training. The data fidelity term and the Noise2Noise network are alternatively optimized respectively using separable quadratic surrogate (SQS) and Adam algorithm. The method was validated both on simulation data and real clinical data. Quantitative analysis demonstrates the method's promising performance on denoising, bias avoiding and detail reservation.","PeriodicalId":6760,"journal":{"name":"2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"22 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84198230","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}

引用次数: 0