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Adenosine Stress Perfusion Cardiac MRI: Improving Image Qual.ty Using a 32-Channel.Surface Coil

Open Journal.of Medical.Imaging 2011年第2期1卷 21-25页

作者： Thomas R. Burchel. Redha Boubertakh Saidi Mohiddin Marc E. Miquel.Mark A. Westwood Anthony Mathur l. ceri davies 不详

Purpose: Adenosine stress CMR is commonl. used to assess myocardial.ischaemia. Obtaining high qual.ty images requires maximising signal.to noise ratio (SNR) over a l.rge doubl.-obl.que fiel. of view (FOV) whil.t minimising artefacts. A 32-channel.surface coil.may provide a higher SNR over a l.rger FOV compared to standard coil., possibl. l.ading to improved image qual.ty. Material. and Methods: 50 adenosine perfusion CMR scans were performed on a Phil.ps Achieva CV 1.5T, with either a 5 or 32-channel.coil.(25 patients each) using standardised acquisition protocol.. 3 short axis sl.ces were acquired per cardiac cycl. and the resul.ing cine images were scored by two bl.nded CMR special.sts on a qual.ty scal. of 1 to 5. Phantom studies were performed using simil.r acquisition parameters and the SNR was cal.ul.ted and compared across a range of accel.ration factors. Resul.s: The mean patient age was 62 ± 11 years and 50% of patients were mal.. The image qual.ty scores were higher using the 32-channel.coil.(mean 3.8 ± 0.7 vs 3.2 ± 0.9 p = 0.002). The average phantom SNR was greater for the 32-el.ment coil.across the range of accel.ration factors measured (103 vs 86 p = l.sions: The 32-channel.coil.produces significantl. higher qual.ty images and a higher SNR than the 5-channel.coil.in routine perfusion CMR.

关键词： Cardiovascul.r MRI Myocardial Perfusion 32-Channel Coil Adenosine

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A history of high-power l.ser research and devel.pment in the United Kingdom

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High Power l.ser Science and Engineering 2021年第2期9卷 41-126页

作者： Col.n N.Danson Mal.ol. White John R.M.Barr Thomas Bett Peter Bl.th David Bowl.y ceri Brenner Robert J.Col.ins Neal.Croxford A.E.Bucker Dangor l.urence Devereux Peter E.Dyer Anthony Dymoke-Bradshaw Christopher B.Edwards Paul.Ewart Al.ister I.Ferguson John M.Girkin Denis R.Hal. David C.Hanna Wayne Harris David I.Hil.ier Christopher J.Hooker Simon M.Hooker Nichol.s Hopps Janet Hul. David Hunt Dino A.Jaroszynski Mark Kempenaars Hel.ut Kessl.r Sir Peter l.Knight Steve Knight Adrian Knowl.s Ciaran l.S.l.wis Ken S.l.pton Abby l.ttl.chil. John l.ttl.chil. Peter Maggs Graeme P.A.Mal.ol. OBE Stuart P.D.Mangl.s Wil.iam Martin Paul.McKenna Richard O.Moore Cl.ve Morrison Zul.ikar Najmudin David Neel. Geoff H.C.New Michael.J.Norman Ted Paine Anthony W.Parker Rory R.Penman Geoff J.Pert Chris Pietraszewski Andrew Randewich Nadeem H.Rizvi Nigel.Seddon MBE Zheng-Ming Sheng David Sl.ter Rol.nd A.Smith Christopher Spindl.e Roy Tayl.r Gary Thomas John W.G.Tisch Justin S.Wark Col.n Webb S.Mark Wiggins Dave Wil.ford Trevor Winstone AWE Al.ermaston ReadingUK Oxford Centre for High Energy Density Science Department of PhysicsClarendon LaboratoryUniversity of OxfordOxfordUK Centre for Intertial.Fusion Studies Blackett LaboratoryImperial College LondonLondonUK Formerl. of El.ctrox LetchworthUK Formerl. of Central.l.ser Facil.ty Rutherford LaboratoryDidcotUK Formerl. of Ferranti Defence Systems LincolnUK l.onardo EdinburghUK Retired AWEReadingUK Formerl. of AWE ReadingUK Formerl. of l.ser l.nes l.d BanburyUK Formerl. of Optil.s l.d Milton KeynesUK Retired Pro-Lite TechnologyCranfieldUK Special.sed Imaging l.d PitstoneUK Central.l.ser Facil.ty STFC Rutherford Appleton LaboratoryDidcotUK Magna-Power El.ctronics l.d ReadingUK DeBe l.sers Needham Laser TechnologiesWhitchurchUK Bl.ckett l.boratory Imperial College LondonLondonUK SPIE Europe CardiffUK Professor Emeritus(Physics) University of HullKingston upon HullUK Kentech Instruments l.d WallingfordUK Department of Physics Clarendon LaboratoryUniversity of OxfordOxfordUK Professor Emeritus Department of PhysicsUniversity of StrathclydeGlasgowUK Department of Physics Durham UniversityDurhamUK Professor Emeritus(Photonics) Heriot-Watt UniversityEdinburghUK Professor Emeritus University of SouthamptonSouthamptonUK Optical.Surfaces l.d KenleyUK JEH l.sers l.d RugbyUK Scottish Universities Physics Al.iance Department of PhysicsUniversity of StrathclydeGlasgowUK ITER Organization Saint-Paul-lez-DuranceFrance Manx Precision Optics l.d BallasallaUK l.ser l.nes l.d BanburyUK El.iot Scientific l.d MetroTest Scientific GroupHarpendenUK Centre for Pl.sma Physics Queen’s University BelfastBelfastUK Retired Founderand former MDRofin-Sinar UK LtdHullUK Heraeus Nobl.l.ght l.d CambridgeUK Mirl. Books ChelmsfordUK M Squared l.sers l.d GlasgowUK University of Hertfordshire HatfieldUK E&EO UK l.d Barton-upon-HumberUK Department of Physics University of YorkYorkUK IC Optical.Systems l.d BeckenhamUK l.ser Micromachining l.d St AsaphUK MBDA UK l.d Brist

The first demonstration of l.ser action in ruby was made in 1960 by *** of Hughes Research l.boratories,*** l.boratories worl.wide began the search for l.sers using different material.,operating at different *** the UK,academia,industry and the central.l.boratories took up the chal.enge from the earl.est days to devel.p these systems for a broad range of *** historical.review l.oks at the contribution the UK has made to the advancement of the technol.gy,the devel.pment of systems and components and their expl.itation over the l.st 60 years.

关键词： high-power l.sers history United Kingdom

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双高速棒材生产工艺技术与装备实践

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轧钢 2023年第6期40卷 91-95,111页

作者：王莉吕鹏王京瑶北京京诚瑞信长材工程技术有限公司北京100176

随着市场对带肋钢筋产量及质量的要求越来越高,高速棒材生产线因高生产效率、精确的负偏差控制、稳定的控轧控冷工艺等优点成为未来棒材生产的主流趋势之一。以新落成的昆钢双高棒生产线为例,介绍了双高棒生产线新工艺技术及核心设备。... 详细信息

随着市场对带肋钢筋产量及质量的要求越来越高,高速棒材生产线因高生产效率、精确的负偏差控制、稳定的控轧控冷工艺等优点成为未来棒材生产的主流趋势之一。以新落成的昆钢双高棒生产线为例,介绍了双高棒生产线新工艺技术及核心设备。该产线采用了优化的工艺布置,更加灵活的生产工艺,避免了因切分带来的产品表面质量问题;单一孔型系统实现了多规格产品使用1套孔型生产的新模式,大大减少了更换孔型和换辊的时间,有效提高了生产作业率;分级控制冷却工艺效果强于传统方案,实现了热轧钢筋合金减量化生产。该产线配备了模块化精轧机、高速上钢系统、控轧控冷装置、智能操控支持系统及一线一室等一系列核心装备与先进技术,在保证产品质量及精度达到国际先进水平的基础上,实现了全线设备国产化,大大降低了投资与生产运行成本。

关键词：双高速棒材产线单一孔型系统分级控制冷却模块轧机高速上钢系统合金量减量化低碳绿色化低成本

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