{"title":"光声层析成像中LTI维纳滤波的反卷积算法","authors":"Tao Lu, Huiyong Mao","doi":"10.1109/SOPO.2009.5230129","DOIUrl":null,"url":null,"abstract":"In order to improve the imaging contrast in photoacoustic tomography, the frequency spectrum of photoacoustic signal should be restored by deconvolving the transducer impulse response out of the photoacoustic signal of the tissue phantom. But it is difficult to generate photoacoustic impulse of a temporal delta function in experiment. To solve the problem, a method that the photoacoustic impulse was produced by a point optical absorber was proposed. The relationship between the transducer frequency response to a temporal delta function and a point optical absorber was studied. A LTI wiener filter was used during deconvolution in order to suppress noise adaptively. The photoacoustic image was finally reconstructed by time-domain spherical back projection algorithm. The feasibility of the method was demonstrated both by numerical simulation and experiment.","PeriodicalId":6416,"journal":{"name":"2009 Symposium on Photonics and Optoelectronics","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Deconvolution Algorithm with LTI Wiener Filter in Photoacousic Tomography\",\"authors\":\"Tao Lu, Huiyong Mao\",\"doi\":\"10.1109/SOPO.2009.5230129\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In order to improve the imaging contrast in photoacoustic tomography, the frequency spectrum of photoacoustic signal should be restored by deconvolving the transducer impulse response out of the photoacoustic signal of the tissue phantom. But it is difficult to generate photoacoustic impulse of a temporal delta function in experiment. To solve the problem, a method that the photoacoustic impulse was produced by a point optical absorber was proposed. The relationship between the transducer frequency response to a temporal delta function and a point optical absorber was studied. A LTI wiener filter was used during deconvolution in order to suppress noise adaptively. The photoacoustic image was finally reconstructed by time-domain spherical back projection algorithm. The feasibility of the method was demonstrated both by numerical simulation and experiment.\",\"PeriodicalId\":6416,\"journal\":{\"name\":\"2009 Symposium on Photonics and Optoelectronics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2009-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2009 Symposium on Photonics and Optoelectronics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/SOPO.2009.5230129\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 Symposium on Photonics and Optoelectronics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SOPO.2009.5230129","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Deconvolution Algorithm with LTI Wiener Filter in Photoacousic Tomography
In order to improve the imaging contrast in photoacoustic tomography, the frequency spectrum of photoacoustic signal should be restored by deconvolving the transducer impulse response out of the photoacoustic signal of the tissue phantom. But it is difficult to generate photoacoustic impulse of a temporal delta function in experiment. To solve the problem, a method that the photoacoustic impulse was produced by a point optical absorber was proposed. The relationship between the transducer frequency response to a temporal delta function and a point optical absorber was studied. A LTI wiener filter was used during deconvolution in order to suppress noise adaptively. The photoacoustic image was finally reconstructed by time-domain spherical back projection algorithm. The feasibility of the method was demonstrated both by numerical simulation and experiment.