IEEE Conference on Nuclear Science Symposium and Medical Imaging最新文献

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Stability and reliability of the double sided silicon strip detector 双面硅条探测器的稳定性和可靠性
IEEE Conference on Nuclear Science Symposium and Medical Imaging Pub Date : 1992-10-25 DOI: 10.1109/NSSMIC.1992.301117
K. Yamamoto, M. Muramatsu, K. Yamamura, M. Ohmura, H. Utsuyama, H. Anzai, Y. Hayama
{"title":"Stability and reliability of the double sided silicon strip detector","authors":"K. Yamamoto, M. Muramatsu, K. Yamamura, M. Ohmura, H. Utsuyama, H. Anzai, Y. Hayama","doi":"10.1109/NSSMIC.1992.301117","DOIUrl":"https://doi.org/10.1109/NSSMIC.1992.301117","url":null,"abstract":"Evaluation devices of a double-sided silicon strip detector have been fabricated. These devices are basically AC-coupled and mainly designed to study the stability and reliability of a coupling capacitor to maintain low noise, high breakdown voltage. A hot electron analyzer was used to check the relation between breakdown voltage and charge injection in the coupling capacitor.<<ETX>>","PeriodicalId":447239,"journal":{"name":"IEEE Conference on Nuclear Science Symposium and Medical Imaging","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133442404","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
Radiation hardness measurements on bipolar test structures and an amplifier-comparator circuit 双极测试结构和放大比较电路的辐射硬度测量
IEEE Conference on Nuclear Science Symposium and Medical Imaging Pub Date : 1992-10-25 DOI: 10.1109/NSSMIC.1992.301437
N. Cartiglia, D. Dorfan, D. Pitzl, J. Rahn, W. Rowe, H. Sadrozinski, E. Spencer, M. Wilde, M. Turala, W. Dąbrowski
{"title":"Radiation hardness measurements on bipolar test structures and an amplifier-comparator circuit","authors":"N. Cartiglia, D. Dorfan, D. Pitzl, J. Rahn, W. Rowe, H. Sadrozinski, E. Spencer, M. Wilde, M. Turala, W. Dąbrowski","doi":"10.1109/NSSMIC.1992.301437","DOIUrl":"https://doi.org/10.1109/NSSMIC.1992.301437","url":null,"abstract":"The authors present radiation hardness measurements of both small-scale bipolar test structures and full amplifier-comparator circuits built in the Tektronix SHPi process. BJTs (bipolar junction transistors (npm of various sizes and a lateral pnp), JFETs (junction field effect transistors), diodes, and resistors have been irradiated to /sup 60/Co doses of up to 5 Mrad and to fluences of up to 1.1*10/sup 14/ cm/sup -2/ of 650 MeV protons. Radiation effects on transistor noise and current gain, the value of the pinch-off voltage and output resistance of the JFET, leakage of diodes, and resistor values are discussed. A full 64-channel amplifier-comparator circuit was exposed to 3.5 Mrad of gammas, and changes in gain and noise were measured. It is concluded that the Tektronix SHPi process appears to offer sufficient radiation hardness for the design of fast, low-power amplifier circuits for the Superconducting Super Collider.<<ETX>>","PeriodicalId":447239,"journal":{"name":"IEEE Conference on Nuclear Science Symposium and Medical Imaging","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133445384","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: 7
Neural network recognition of objects based on impact dynamics 基于冲击动力学的物体神经网络识别
IEEE Conference on Nuclear Science Symposium and Medical Imaging Pub Date : 1992-10-25 DOI: 10.1109/NSSMIC.1992.301442
M. Holler, A. Shmurun, S. Tam, J. Brauch
{"title":"Neural network recognition of objects based on impact dynamics","authors":"M. Holler, A. Shmurun, S. Tam, J. Brauch","doi":"10.1109/NSSMIC.1992.301442","DOIUrl":"https://doi.org/10.1109/NSSMIC.1992.301442","url":null,"abstract":"A system is presented which can classify unknown objects by the waveform produced upon their impact with a known object. The output of an accelerometer mounted on the known object is read into a unit that computes the waveform's discrete Fourier transform (DFT), which is then fed into a two-layer neural network recognition module. The specific application described observes a collision between two objects, one of which is a wooden platform while the other is made out of a different material. After being shown sample waveforms produced by collisions with three types of objects, the system can then classify new collisions with the objects within 6 ms after the impact. Both the DFT unit and the classification network are implemented with Intel's 80170NX Electrically Trainable Analog Neural Network (ETANN).<<ETX>>","PeriodicalId":447239,"journal":{"name":"IEEE Conference on Nuclear Science Symposium and Medical Imaging","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132724716","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
Implementing automated procurement engineering at BG&E 在BG&E实施自动化采购工程
IEEE Conference on Nuclear Science Symposium and Medical Imaging Pub Date : 1992-10-25 DOI: 10.1109/NSSMIC.1992.301421
K.B. Cellars, J. Spina, M.A. Elzey, E. F. McGinn, M. Winsor
{"title":"Implementing automated procurement engineering at BG&E","authors":"K.B. Cellars, J. Spina, M.A. Elzey, E. F. McGinn, M. Winsor","doi":"10.1109/NSSMIC.1992.301421","DOIUrl":"https://doi.org/10.1109/NSSMIC.1992.301421","url":null,"abstract":"Baltimore Gas and Electric's (BG&E's) approach to implementing an automated procurement engineering process is presented. The process emphasizes part safety classification, procurement specification, and warehouse description standardization, of a limited population of the most frequently procured parts (stocked replacement items for safety-related systems, structures, and components). Logical grouping of over 10000 stock items resulted in consolidation to 275 automated procurement specifications maintained through a PC-based computer application. This automation has resulted in the following cost benefits: reduced procurement engineering staff, reduced procurement request backlog, reduced volume of bid exceptions/deviations, and elimination of duplicate stocked items.<<ETX>>","PeriodicalId":447239,"journal":{"name":"IEEE Conference on Nuclear Science Symposium and Medical Imaging","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133186964","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
Proton therapy in combination with PET as monitor: a feasibility study 质子治疗联合PET监测的可行性研究
IEEE Conference on Nuclear Science Symposium and Medical Imaging Pub Date : 1992-10-25 DOI: 10.1109/NSSMIC.1992.301094
A. Paans, J. Schippers
{"title":"Proton therapy in combination with PET as monitor: a feasibility study","authors":"A. Paans, J. Schippers","doi":"10.1109/NSSMIC.1992.301094","DOIUrl":"https://doi.org/10.1109/NSSMIC.1992.301094","url":null,"abstract":"To evaluate the possibility of combining proton therapy with positron emission tomography (PET) as a therapy monitor and as a tool for in situ dosimetry during therapy, proton activation experiments have been performed using a 55-MeV proton beam on two different materials. The three-dimensional measurements of the induced activity with PET are compared with the calculated dose distribution and with model calculations. It is concluded that the radioactivity induced by proton beams in tissue-like (consisting mainly of C, N and O) materials can be measured accurately by means of PET. It is expected that the rather low amount of activity created during a therapy treatment can be detected with sufficient accuracy; in particular, the region preceding the Bragg peak in the dose distribution can be monitored quite well with this method.<<ETX>>","PeriodicalId":447239,"journal":{"name":"IEEE Conference on Nuclear Science Symposium and Medical Imaging","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133209166","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: 66
A pipelined 4 by 12-bits domino logic VLSI adder 一个流水线4 × 12位的domino逻辑VLSI加法器
IEEE Conference on Nuclear Science Symposium and Medical Imaging Pub Date : 1992-10-25 DOI: 10.1109/NSSMIC.1992.301289
D. Panescu, T. Górski, Y. Hu, J. Lackey, P. Robl, W.H. Smith
{"title":"A pipelined 4 by 12-bits domino logic VLSI adder","authors":"D. Panescu, T. Górski, Y. Hu, J. Lackey, P. Robl, W.H. Smith","doi":"10.1109/NSSMIC.1992.301289","DOIUrl":"https://doi.org/10.1109/NSSMIC.1992.301289","url":null,"abstract":"A four 12-bit numbers adder fabricated using a 1.2 mu m N-well CMOS process is presented. It is proposed for use in the computation of the pipelined energy sums in the detectors at the Superconducting Super Collider (SSC). It comprises three 12-bit adders organized as a two-stage pipeline. To compute the final carry bit, the carry-select technique applied to five 4-bit adders is used. The 4-bit adders use the carry-lookahead method to compute their carriers. In order to reduce the circuit area and to simplify its structure the multiple-output domino logic design style is used. The first stage of the pipeline (two adders) performs two 12-bit additions in parallel while the second stage (one adder) finishes up the previously started computation. The pipeline is driven using a two-phase clocking strategy by processing a single-phase external clock. A worst-case throughput of 18 ns is achieved. A built-in facility for testing the first stage of the pipeline is included. The area of the circuit is 1425*5510 mu m/sup 2/; it has 76 pads; and it was packed in a 132 PGA. The transistor count is 6639. The dissipated power, at 18-ns clock, is approximately=0.75 W. The circuit has been fabricated through MOSIS, and a yield of approximately=80% for a lot of 50 chips was found.<<ETX>>","PeriodicalId":447239,"journal":{"name":"IEEE Conference on Nuclear Science Symposium and Medical Imaging","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134484160","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
Adjustable speed drives in nuclear applications 核应用中的可调速驱动器
IEEE Conference on Nuclear Science Symposium and Medical Imaging Pub Date : 1992-10-25 DOI: 10.1109/NSSMIC.1992.301406
N. Porter
{"title":"Adjustable speed drives in nuclear applications","authors":"N. Porter","doi":"10.1109/NSSMIC.1992.301406","DOIUrl":"https://doi.org/10.1109/NSSMIC.1992.301406","url":null,"abstract":"The application of adjustable speed drive technology at a nuclear plant is described. The 8900 hp reactor recirculating coolant pump motors will be driven by a GTO-PWM (gate turn-off pulse-width-modulated) drive rated at 11200 hp.<<ETX>>","PeriodicalId":447239,"journal":{"name":"IEEE Conference on Nuclear Science Symposium and Medical Imaging","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115391429","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
The temporal response and relative proton-to-gamma ratio of radiation detectors made from natural diamond 天然金刚石辐射探测器的时间响应和相对质子-伽马比
IEEE Conference on Nuclear Science Symposium and Medical Imaging Pub Date : 1992-10-25 DOI: 10.1109/NSSMIC.1992.301147
R. Wagner, J. R. Joseph, R. Hilko, R. Harper, J. Tinsley
{"title":"The temporal response and relative proton-to-gamma ratio of radiation detectors made from natural diamond","authors":"R. Wagner, J. R. Joseph, R. Hilko, R. Harper, J. Tinsley","doi":"10.1109/NSSMIC.1992.301147","DOIUrl":"https://doi.org/10.1109/NSSMIC.1992.301147","url":null,"abstract":"The temporal response, relative proton-to-gamma ratio, and relative sensitivity of photoconductive detectors made in identical physical geometries from natural Class IIa diamond and from neutron-irradiated GaAs were measured. The temporal response of the diamond detectors varied from 145 to 360 ps FWHM for a 30 ps, 16 MeV end-point bremsstrahlung pulse. This response compares to 103 ps FWHM for the GaAs detectors. Proton-to-gamma ratios for the diamond detectors were three times those of the GaAs detectors. The relative sensitivities of the diamond detectors, compared with those in the GaAs detectors, were 0.5 to 0.7. The leakage current of the diamond detectors was at least three orders of magnitude lower than those in the GaAs devices. The temporal response of neutron-irradiated diamond detector was 90 ps FWHM, a significant improvement in speed over natural diamond.<<ETX>>","PeriodicalId":447239,"journal":{"name":"IEEE Conference on Nuclear Science Symposium and Medical Imaging","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115586021","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
Using list-mode data to compare scatter corrections in I-131 imaging 使用列表模式数据比较I-131成像中的散射校正
IEEE Conference on Nuclear Science Symposium and Medical Imaging Pub Date : 1992-10-25 DOI: 10.1109/NSSMIC.1992.301065
K. R. Pollard, A. Bice, L. Durack, T. Lewellen, R. Miyaoka, S. Kohlmyer
{"title":"Using list-mode data to compare scatter corrections in I-131 imaging","authors":"K. R. Pollard, A. Bice, L. Durack, T. Lewellen, R. Miyaoka, S. Kohlmyer","doi":"10.1109/NSSMIC.1992.301065","DOIUrl":"https://doi.org/10.1109/NSSMIC.1992.301065","url":null,"abstract":"Gamma camera imaging of I-131 suffers from detection of Compton-scattered events. Many different methods of scatter correction have been proposed for lower-energy radionuclide (e.g., Tc-99m) imaging. Extension of these scatter corrections to I-131 imaging is not obvious and may not be simple, because a significant fraction of the detected scatter is due to gamma rays that have scattered in the camera-head. The authors acquired list-mode data (x, y and E) from a digital gamma camera and rebinned it in different ways to compare five different scatter-correction techniques: lower-window subtraction, upper-window subtraction, upper and lower window subtraction, linear dual photopeak, and nonlinear dual photopeak. A lower, Compton-window subtraction appears most stable, and perhaps best.<<ETX>>","PeriodicalId":447239,"journal":{"name":"IEEE Conference on Nuclear Science Symposium and Medical Imaging","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114490181","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
A sophisticated estimation of scatter component in energy spectra using an artificial neural network in radionuclide imaging 利用人工神经网络对放射性核素成像中能谱散射分量的复杂估计
IEEE Conference on Nuclear Science Symposium and Medical Imaging Pub Date : 1992-10-25 DOI: 10.1109/NSSMIC.1992.301507
K. Ogawa, N. Nishizaki
{"title":"A sophisticated estimation of scatter component in energy spectra using an artificial neural network in radionuclide imaging","authors":"K. Ogawa, N. Nishizaki","doi":"10.1109/NSSMIC.1992.301507","DOIUrl":"https://doi.org/10.1109/NSSMIC.1992.301507","url":null,"abstract":"The authors present a novel method for estimating primary photons using an artificial neural network in radionuclide imaging. The neural network for Tc-99m has three layers, one input layer with five units, one hidden layer with five units, and one output layer with two units. As input values to the input units, count ratios were used which were the ratios of the counts acquired by narrow windows to the total count acquired by a broad window with the energy range from 125 to 154 keV. The outputs were a scatter count ratio and a primary count ratio. Using the primary count ratio and the total count, the primary count of the pixel was calculated directly. The neural network was trained with a backpropagation algorithm using calculated true energy spectra obtained by a Monte Carlo method. The simulation showed that accurate estimation of primary photons was accomplished within an error ratio of about 3% for primary photons.<<ETX>>","PeriodicalId":447239,"journal":{"name":"IEEE Conference on Nuclear Science Symposium and Medical Imaging","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114523919","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
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