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ID:36864747
大小:1.81 MB
页数:50页
时间:2019-05-17
《反投影断层阻抗成像的图像处理与分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、翌苎三些釜竺竺三堂笙丝苎,反投影断层阻抗成像的图像处理与分析摘要当今对医学威像技术的要求越来越高,研究也越来越广泛。龟抗断层成像2、外扰动算法、拟Newton算法等。目前这些算法普遍图像分辨率低,不能满足嬷床要求。提离图像质量的方法有两静,~种是改进算法,另一静是数字图像处理。反投影算法是一种应用广泛、极为有效的重建算法,它成像速度快,可以实现实时监测,但是它的成像结果不理想、分辨率较低,所以本论文尝试对反投影重建图像进行图像处理,提高反投影图像的分辨率,以求得到较为清晰的图像。完成的主要工作如下:11研究了反投影断层成像的图像重建算法,对比了在不同剖分密度和不同阻抗变化区域情况下的成缘分辨率。2)运用数字图像处理技术,对反投影断层成像结果进行图像采集3、和数字化,研究了对反投影断层成像的成像结果进行数字化的方法。3)对反投影断层成像的成像结果进行数字化分析和处理,处理的结果基本上可以去除噪声并增强分辨率,可以达到预期效果。关键词:电阻抗断层成像,反投影,数字图像处理,滤波反投影断层瓢抗J蕊像的圈像她珊筠分析lMAGE刘姨NlPU毛A重loNANDANAlⅣSISoFTH飘ELECTRICALlMPEDANCEToMoGRAPHYABSTRACTTodaymedicalimagingtechnologyisusedmorewidelyandhasbeenadvancedmo4、re.ElectricalImpedanceTomography(EIT)isakindofnewmedicalimagingmethod.Itdon’tusethenuclideandtheradialtodoharmtothehumanbodv}SOitcanbeusedmanytimesconfinuousI孓Anditisalsoverycheapandconvenient,SOitis程kindofperfectandtemptingmedicalimagingtechnologywithoutharm.Imag5、ingreconstructionmethodisoneoftheimportantaspectofEIT.TheEITreconstructionmethodincludesdynamicimagingandstaticimaging。DynamicimagingincludesSensitivityMatrixmethod,BackProjectionmethodere.StaticimagingincludesNewton—Raphsonmethod,asidedisturbmethodandimitatedNewt6、onmethodetc.Allthesemethods’resolvingpowerarelOWandCannotsatisfytheclinic。Sotherearetwomethodstoimprovetheimagingquality,oneisamendingthealgodthra,theotherisDigitaiImageProcessing(DIP).Backerojection(BP)isvalidandwidelyused.ItisfastandCanbedetectedattherealtime,bu7、titsimagingresMtisblurry.ThearticletrytomakeimagemanipulationandanalysistotheBackprojectionreconstructionimagetoenhancetheresolvingpowerandachieveaclearerimage.ThemainWOrkwasasfollows:({)StudiedtheBackProjection国垮reconstructionmethod.Comparedthedifferentresolvingp8、oweroftheresultsofthedifferentcelldensityanddifferentresistancechangingplace.(2)UsingtheDigitalImageProcessing《DpX媳eEITimagecouldbecollectedanddigitized
2、外扰动算法、拟Newton算法等。目前这些算法普遍图像分辨率低,不能满足嬷床要求。提离图像质量的方法有两静,~种是改进算法,另一静是数字图像处理。反投影算法是一种应用广泛、极为有效的重建算法,它成像速度快,可以实现实时监测,但是它的成像结果不理想、分辨率较低,所以本论文尝试对反投影重建图像进行图像处理,提高反投影图像的分辨率,以求得到较为清晰的图像。完成的主要工作如下:11研究了反投影断层成像的图像重建算法,对比了在不同剖分密度和不同阻抗变化区域情况下的成缘分辨率。2)运用数字图像处理技术,对反投影断层成像结果进行图像采集
3、和数字化,研究了对反投影断层成像的成像结果进行数字化的方法。3)对反投影断层成像的成像结果进行数字化分析和处理,处理的结果基本上可以去除噪声并增强分辨率,可以达到预期效果。关键词:电阻抗断层成像,反投影,数字图像处理,滤波反投影断层瓢抗J蕊像的圈像她珊筠分析lMAGE刘姨NlPU毛A重loNANDANAlⅣSISoFTH飘ELECTRICALlMPEDANCEToMoGRAPHYABSTRACTTodaymedicalimagingtechnologyisusedmorewidelyandhasbeenadvancedmo
4、re.ElectricalImpedanceTomography(EIT)isakindofnewmedicalimagingmethod.Itdon’tusethenuclideandtheradialtodoharmtothehumanbodv}SOitcanbeusedmanytimesconfinuousI孓Anditisalsoverycheapandconvenient,SOitis程kindofperfectandtemptingmedicalimagingtechnologywithoutharm.Imag
5、ingreconstructionmethodisoneoftheimportantaspectofEIT.TheEITreconstructionmethodincludesdynamicimagingandstaticimaging。DynamicimagingincludesSensitivityMatrixmethod,BackProjectionmethodere.StaticimagingincludesNewton—Raphsonmethod,asidedisturbmethodandimitatedNewt
6、onmethodetc.Allthesemethods’resolvingpowerarelOWandCannotsatisfytheclinic。Sotherearetwomethodstoimprovetheimagingquality,oneisamendingthealgodthra,theotherisDigitaiImageProcessing(DIP).Backerojection(BP)isvalidandwidelyused.ItisfastandCanbedetectedattherealtime,bu
7、titsimagingresMtisblurry.ThearticletrytomakeimagemanipulationandanalysistotheBackprojectionreconstructionimagetoenhancetheresolvingpowerandachieveaclearerimage.ThemainWOrkwasasfollows:({)StudiedtheBackProjection国垮reconstructionmethod.Comparedthedifferentresolvingp
8、oweroftheresultsofthedifferentcelldensityanddifferentresistancechangingplace.(2)UsingtheDigitalImageProcessing《DpX媳eEITimagecouldbecollectedanddigitized
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