2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)最新文献_第3页

Motion compensated 4D PET-CT-MR image generation for respiratory synchronized multi-modal image display 运动补偿4D PET-CT-MR图像生成呼吸同步多模态图像显示

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-11-01 DOI: 10.1109/NSSMIC.2013.6829266

W. H. Nam, Jihye Kim, I. Ahn, Yongjin Chang, J. Ra

{"title":"Motion compensated 4D PET-CT-MR image generation for respiratory synchronized multi-modal image display","authors":"W. H. Nam, Jihye Kim, I. Ahn, Yongjin Chang, J. Ra","doi":"10.1109/NSSMIC.2013.6829266","DOIUrl":"https://doi.org/10.1109/NSSMIC.2013.6829266","url":null,"abstract":"Positron emission tomography (PET) image has been widely used for early detection of malignant lesion(s) and its treatment, because it can provide functional information. Since computed tomography (CT) and magnetic resonance (MR) images can provide high resolution anatomical information, their simultaneous display with PET image may improve the clinical value of PET-image-based applications. Meanwhile, temporal information regarding anatomical changes due to respiration may be important in the radiation therapy planning of a thoracic or abdominal region. To provide such important information, we propose a framework for motion compensated 4D PET-CT-MR image generation. To realize the framework, we present a MR-driven motion compensation algorithm for respiratory-gated 4D PET imaging. We then introduce a respiratory-synchronized multi-modal image generation method. We expect that the respiratory-synchronized multi-modal image display can be useful for clinicians to efficiently utilize the temporal information as well as the complementary spatial information in their applications.","PeriodicalId":246351,"journal":{"name":"2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)","volume":"148 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131435984","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

Imaging corn plants with PhytoPET, a modular PET system for plant biology 用植物生物学的模块化PET系统PhytoPET成像玉米植株

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-11-01 DOI: 10.1109/NSSMIC.2013.6829796

S. Lee, B. Kross, J. McKisson, J. McKisson, A. Weisenberger, W. Xi, C. Zorn, G. Bonito, C. Howell, C. Reid, A. Crowell, L. Cumberbatch, C. Topp, M. Smith

引用次数: 5

LOR-based reconstruction for super-resolved 3D PET image 基于lr的超分辨三维PET图像重建

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-11-01 DOI: 10.1109/NSSMIC.2013.6829239

I. Ahn, Jihye Kim, W. H. Nam, Yongjin Chang, J. Ra

{"title":"LOR-based reconstruction for super-resolved 3D PET image","authors":"I. Ahn, Jihye Kim, W. H. Nam, Yongjin Chang, J. Ra","doi":"10.1109/NSSMIC.2013.6829239","DOIUrl":"https://doi.org/10.1109/NSSMIC.2013.6829239","url":null,"abstract":"PET images usually suffer from low spatial resolution due to positron range, photon non-collinearity, scatters inside scintillating crystals, finite dimension of crystals, and so on. To improve the spatial resolution based on wobble scanning, we previously proposed a sinogram-based super-resolution (SR) algorithm based on a space-variant blur matrix. However, the algorithm may cause unwanted resolution loss due to an inevitable interpolation process for preparing even-spaced sinograms. In this paper, we propose a novel and efficient one-step line of response (LOR) based SR framework for 3D PET images. In the framework, we efficiently determine a large number of space-variant PSFs in an image space by using the scanner symmetries and the proposed PSF interpolation scheme based on non-rigid registration. We then obtain a HR image via one-step super-resolved 3D PET image reconstruction with the determined PSFs. Furthermore, we reduce the computational time of GPU-based reconstruction by introducing a parallel-friendly cone-beam based LOR system matrix. The proposed framework provides noticeable improvement on the spatial resolution of PET images with a considerable reduction of computational time.","PeriodicalId":246351,"journal":{"name":"2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)","volume":"292 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115753212","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

Characterization results and first applications of KLauS - an ASIC for SiPM charge and fast discrimination readout 用于SiPM电荷和快速鉴别读出的专用集成电路KLauS的表征结果和首次应用

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-10-31 DOI: 10.1109/NSSMIC.2013.6829778

K. Briggl, W. Shen, T. Harion, R. Hagdorn, P. Eckert, T. Klapdor-Kleingrothaus, M. Dorn, H. Schultz-Coulon

{"title":"Characterization results and first applications of KLauS - an ASIC for SiPM charge and fast discrimination readout","authors":"K. Briggl, W. Shen, T. Harion, R. Hagdorn, P. Eckert, T. Klapdor-Kleingrothaus, M. Dorn, H. Schultz-Coulon","doi":"10.1109/NSSMIC.2013.6829778","DOIUrl":"https://doi.org/10.1109/NSSMIC.2013.6829778","url":null,"abstract":"KLauS is an ASIC produced in the AMS 0.35μm SiGe technology to read out the charge signals from silicon photomultipliers. Developed as an analog front end for future calorimeters with high granularity as pursued by the AHCAL concept in the CALICE collaboration, the ASIC is supposed to measure the charge signal of the sensors in a large dynamic range and with a high precision. In order to compensate bias and temperature fluctuations of each sensor individually, an 8-bit DAC to tune the voltage at the input terminal is implemented. Using an integrated fast comparator with low jitter, the time information can be measured with sub-nanosecond resolution. The low power consumption of the ASIC can be further decreased using power gating techniques. Future versions of KLauS are under development and will incorporate an ADC with a resolution of up to 12 bit together with blocks for digital data transmission. Most recent characterization results for the KLauS chip are presented as well as results from a KLauS-based test setup developed for mass characterization of scintillator tiles used in the AHCAL test beam program.","PeriodicalId":246351,"journal":{"name":"2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128500603","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

The LHCb trigger system: Performance and outlook LHCb触发系统:性能和前景

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-10-31 DOI: 10.1109/NSSMIC.2013.6829553

A. Navarro

引用次数: 0

ATLAS trigger menu and performance in Run 1 and prospects for Run 2 ATLAS触发器菜单和运行1中的性能以及运行2的前景

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-10-29 DOI: 10.1109/NSSMIC.2013.6829554

O. Igonkina

引用次数: 2

Development of a 3D imaging calorimeter in lanthanum bromide for gamma-ray space astronomy 伽玛射线空间天文学用溴化镧三维成像量热计的研制

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-10-29 DOI: 10.1109/NSSMIC.2013.6829593

A. Gostojić, V. Tatischeff, J. Kiener, C. Hamadache, N. Karkour, D. Linget, G. Sedes, S. Blin, P. Barrillon

{"title":"Development of a 3D imaging calorimeter in lanthanum bromide for gamma-ray space astronomy","authors":"A. Gostojić, V. Tatischeff, J. Kiener, C. Hamadache, N. Karkour, D. Linget, G. Sedes, S. Blin, P. Barrillon","doi":"10.1109/NSSMIC.2013.6829593","DOIUrl":"https://doi.org/10.1109/NSSMIC.2013.6829593","url":null,"abstract":"The new generation of high light-output inorganic scintillators i.e. cerium-doped lanthanum(III) bromide (LaBr3:Ce) show a promising future in application as a space-based γ-ray calorimeter. Its internal qualities such as good energy resolution or radiation tolerance are well suited for detection of γ-rays in the MeV range, thus providing access to, so far, understudied questions in physics of nucleosynthesis, the active Sun or astrophysical compact objects. For this purpose, under the project of creating a new Compton telescope prototype, we have studied the response of a detection module comprising a 5×5 cm2 area and 1 cm thick LaBr3:Ce crystal scintillator coupled to a 64 channel multi-anode photomultiplier read out by the ASIC MAROC. Measurements with various radioactive sources have been compared with detailed GEANT4 simulations that include the tracking of the near-UV photons produced in the scintillation crystal. The localization of the first interaction point of incident γ-rays have been studied from the measured charge distributions using an artificial neural network. Together with the other measured properties, the position resolution that we obtain makes this detector module very interesting for the next generation of space telescopes operating in the medium-energy γ-ray domain.","PeriodicalId":246351,"journal":{"name":"2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127764362","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: 4

A penalized weighted least-squares image reconstruction based on scatter correction methods for X-ray CT 基于散射校正方法的x射线CT惩罚加权最小二乘图像重建

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-10-27 DOI: 10.1109/NSSMIC.2013.6829246

Long Chen, T. Rodet, N. Gac

引用次数: 2

Incorporation of time-of-flight information in PET list-mode reconstruction using a projector with accurate detector PSF modeling 结合飞行时间信息的PET表模重建利用投影仪与精确的探测器PSF建模

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-10-27 DOI: 10.1109/NSSMIC.2013.6829242

A. Autret, J. Bert, O. Strauss, D. Visvikis

{"title":"Incorporation of time-of-flight information in PET list-mode reconstruction using a projector with accurate detector PSF modeling","authors":"A. Autret, J. Bert, O. Strauss, D. Visvikis","doi":"10.1109/NSSMIC.2013.6829242","DOIUrl":"https://doi.org/10.1109/NSSMIC.2013.6829242","url":null,"abstract":"In list-mode PET reconstruction the projector is an operator that computes on-the-fly the spatial detector response related to a specific line-of-response (LOR). In the literature, many projectors with PSF modeling have been proposed with different levels of accuracy. A recently proposed projector based on the random sampling of the intrinsic detector response function was shown to accurately model all detector effects including geometry and crystal scatter. Recent PET scanners have the capability to measure the difference in the time arrival of the annihilation gamma photon pairs, also called time-of-flight (TOF). Many studies have shown the benefits, in terms of image quality, from the use of the TOF within the reconstruction process. In this study we evaluate the impact of including TOF information within a projector that includes a full modeling of the detector response. A comparative study with non-TOF image reconstruction using a projector with no (Siddon) and a less accurate (Gaussian) detector PSF modeling was also included in this study. All reconstruction algorithms were implemented on multi-GPUs. Results have shown that combining both TOF and PSF allows a double benefit on the reconstructed images. Contrast recovery was improved by nearly a factor of two, and overall execution times including TOF information were reduced by half compared to corresponding non-TOF reconstructions.","PeriodicalId":246351,"journal":{"name":"2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130952778","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

Evaluation of dosimetry characteristics of a Silicon Photo-Multiplier with a plastic scintillator by Cs-137 用Cs-137评价带有塑料闪烁体的硅光倍增器的剂量学特性

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-10-27 DOI: 10.1109/NSSMIC.2013.6829622

H. Yoo, C. Kim, Y. Kim, J. Kim, M. Kim, D. Lee, M. Cho, H. Kim, K. Park, D. Kang, S. Park, G. Cho

{"title":"Evaluation of dosimetry characteristics of a Silicon Photo-Multiplier with a plastic scintillator by Cs-137","authors":"H. Yoo, C. Kim, Y. Kim, J. Kim, M. Kim, D. Lee, M. Cho, H. Kim, K. Park, D. Kang, S. Park, G. Cho","doi":"10.1109/NSSMIC.2013.6829622","DOIUrl":"https://doi.org/10.1109/NSSMIC.2013.6829622","url":null,"abstract":"A Silicon Photo Multiplier (SiPM) is states of arts radiation detector, it is alternative to PM-Tube. But, availability research of SiPM is not entirely satisfactory. In this study, we suggest the radiation detector module coupled with the SiPM and the plastic scintillator, and then, evaluate the availability of detector module for Cs-137 dosimetry. To confirm the dosimetry characteristics, we experimented count difference depends on equivalent dose rate and equivalent dose comparing with MCNP calculation, and, calculating the conversion coefficient depends on count rate and total count that finding the region keeps the linearity of calculating the dose. These experiment results means the SiPM with the plastic scintillator is able to use the dosimetry application for Cs-137. New detector module has the advantages that smaller volume than GM Tube and ion chamber and the lower price than indirect detector module using inorganic scintillator as CsI(TI). So, it will helpful to relieving the public anxiety about radiation exposure by popularizing the dosimetry device.","PeriodicalId":246351,"journal":{"name":"2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134146178","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