2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)最新文献_第4页

A new solution of time synchronization in all-digital PET based on TDC 基于TDC的全数字PET时间同步新方案

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7581850

Lei Fang, Bo Zhang, Li Yan, Jian Dai, Weidong Wang, Q. Xie, Jing Li

{"title":"A new solution of time synchronization in all-digital PET based on TDC","authors":"Lei Fang, Bo Zhang, Li Yan, Jian Dai, Weidong Wang, Q. Xie, Jing Li","doi":"10.1109/NSSMIC.2015.7581850","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581850","url":null,"abstract":"High-accuracy time synchronization is one of the most important issues for basic detector modules (BDMs) in the all-digital PET. The existing synchronization solutions are hard to extend as strict requirement to the wires and interfaces. Once the number of BDM changed, the whole system's synchronization should be rebuilt from the beginning. In this paper, a new high-accuracy time-sync solution based on TDC with a feature of flexible extensible has been designed and implemented. It provides a protocol for time correction by any of two detectors through a simple communication: Each TDC implemented in every detector will record the accurate time of both the ASK and REPLY messages and sends the time-records to the other. By the exchange of time-records, the two detectors will calculate the time differences and correct it to for time synchronization. This method promise a lower requirement to the interfaces, and much simpler connecting and easier to be extended. And it can always offer a high accuracy time synchronization by just a soft correction, despite of the change or development of the PET system such as increasing or decreasing detectors.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121080284","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

Investigation of RF field penetrability of a novel electrically floating PET insert for PET/MR 一种新型电浮PET/MR嵌套的射频场穿透性研究

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7582092

Brian J. Lee, Alexander M. Grant, Chen-Ming Chang, C. Levin

{"title":"Investigation of RF field penetrability of a novel electrically floating PET insert for PET/MR","authors":"Brian J. Lee, Alexander M. Grant, Chen-Ming Chang, C. Levin","doi":"10.1109/NSSMIC.2015.7582092","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7582092","url":null,"abstract":"Combined positron emission tomography (PET) and magnetic resonance imaging (MRI) has shown potential to provide a powerful tool for disease characterization as it enables the simultaneous measurement of molecular, functional and anatomical information of the body. However, the availability of whole-body simultaneous PET/MRI has been limited by its high cost. To address this issue, we have developed an RF-penetrable PET technology that can be inserted into an MRI system without requiring modifications to the MR hardware. The prototype PET insert consists of 16 PET detector modules in a 32 cm ring pattern with 1 mm inter-modular gaps. By using electro-optical coupling technology, and batteries for power, the PET insert is electrically floating relative to the MRI RF ground which allows the RF field transmitted from the built-in body coil to penetrate through the PET ring. We performed experiments with various configurations to study the RF-penetrability of the PET insert in the MR system: No PET insert, with PET insert (powered with batteries), with PET ring gaps blocked with copper conductor but ends open, and with PET inserted, ends blocked with copper conductor but gaps open. With these configurations, we acquired B1 maps and performed electromagnetic simulations. We then compared the magnitude and homogeneity of the acquired B1 maps and simulation results. We have found that negligible amount of RF field enters through the gaps with the ends blocked, but this contributes to increasing the uniformity by ~400% when ends and gaps are both open. Then, the electromagnetic simulations show that by either decreasing the detector height and/or widening the inter-module gaps improve the RF-penetrability by nearly 300%.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121151477","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

Development of the trigger readout system for the phase-I upgrade of the ATLAS Liquid Argon calorimeters ATLAS液氩量热计一期升级触发读出系统的研制

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7581793

H. Xu

{"title":"Development of the trigger readout system for the phase-I upgrade of the ATLAS Liquid Argon calorimeters","authors":"H. Xu","doi":"10.1109/NSSMIC.2015.7581793","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581793","url":null,"abstract":"The ATLAS Liquid Argon (LAr) Calorimeters were designed and built to measure electromagnetic and hadronic energy in proton-proton collisions produced at the LHC at centre-of-mass energies up to 14 TeV and at instantaneous luminosities up to 1034cm-2s-1. An LHC upgrade is planned to enhance the luminosities to 2-3×1034cm-2s-1 and to deliver an integrated luminosity of about 300 fb-1 during Run 3 from 2021 through 2023. In order to improve the identification performance for electrons, photons, taus, jets, missing energy at high background rejection rates, an improved spatial granularity of the trigger primitives has been proposed. A new trigger readout system is being designed to digitize and process the signals with higher spatial granularity. A demonstrator system has been developed and installed on the ATLAS detector to evaluate the technical and performance aspects. Analog signal parameters including noise and cross-talk have been analyzed. The performance of the new demonstrator system in the data taking run will be presented. The next generation of prototypes for the trigger readout system is being developed. In this paper, research and development of radiation tolerant custom ASICs for the final trigger readout system will be discussed.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124860590","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: 2

Summing of dynamic sinograms 动态图的求和

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7582061

Chuanyu Zhou, W. K. Luk, M. Casey

引用次数: 1

The building blocks for the upgrade of the LHCb RICH detectors LHCb RICH探测器升级的基石

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7581962

C. Gotti

引用次数: 0

Volume visualization using adaptive tetrahedral mesh with GPU-accelerated fast cell search 基于gpu加速快速单元搜索的自适应四面体网格体可视化

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7581930

A. Kimura, Satoshi Tanaka

引用次数: 0

Initial results for automatic calibration of the LabPET II front-end detector module LabPET II前端检测器模块自动校准的初步结果

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7582076

Nadia Jurgensen, L. Arpin, H. Bouziri, L. Njejimana, K. Koua, Émilie Gaudin, J. Pratte, R. Lecomte, R. Fontaine

引用次数: 1

A high frame rate pixel readout chip design for synchrotron radiation applications 用于同步辐射应用的高帧率像素读出芯片设计

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7582280

Wei Wei, Jie Zhang, Z. Ning, Yun-Ju Lu, L. Fan, Huai-shen Li, Xiaoshan Jiang, A. K. Lan, Q. Ouyang, Z. Wang, K. Zhu, Yuan-bo Chen, Peng Liu

引用次数: 9

Experiment research on liquid security screening with energy dispersive X-ray diffraction 能量色散x射线衍射液体安全筛检实验研究

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7581755

Tianyi Yangdai, Li Zhang

引用次数: 1

Segmentation method for breast tumor diagnosis based on Artificial Neural Network algorithm applied to dynamic 18F-FDG PET images 基于人工神经网络算法的乳腺肿瘤诊断分割方法应用于动态18F-FDG PET图像

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7582056

Xinyue Zhang, Yinlin Li, R. Sánchez-Jurado, A. Pardo, Andrew M. Polemi, Antonio J. González, J. Alamo, J. Ferrer, S. Majewski, B. Kundu

引用次数: 1