M-sequence-coded excitation for magneto-acoustic imaging.
Magneto-acoustic imaging is a novel functional imaging method to electrical characteristics of tissue. It provides valuable tools for diagnosing early stage tumor and monitoring bioelectrical current. Common single short-pulse excitation limits SNR due to the short-pulse duration and low power of ma...
| Publicado en: | Medical & Biological Engineering & Computing Vol. 57; no. 5; pp. 1059 - 1068 |
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| Autores principales: | , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
May2019
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=135997073&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 135997073 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01400118 PO0 jtl: Medical & Biological Engineering & Computing issn: 01400118 maglogo: N pubinfo: dt: May2019 vid: 57 iid: 5 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 135997073 135997073 NLM30569398 10.1007/s11517-018-1941-x NLM30569398 135997073 ppf: 1059 ppct: 9 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: M-sequence-coded excitation for magneto-acoustic imaging. aug: au: Zhang, Shunqi Ma, Ren Yin, Tao Liu, Zhipeng affil: Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China sug: subj: Acoustics Signal Processing, Computer Assisted Image Processing, Computer Assisted Methods Sensitivity and Specificity Finite Element Analysis Computer Simulation Image Processing, Computer Assisted Electromagnetic Fields Clinical Assessment Tools Short Portable Mental Status Questionnaire ab: Magneto-acoustic imaging is a novel functional imaging method to electrical characteristics of tissue. It provides valuable tools for diagnosing early stage tumor and monitoring bioelectrical current. Common single short-pulse excitation limits SNR due to the short-pulse duration and low power of magneto-acoustic signal. In this study, we propose M-sequence-coded excitation and pulse compression approach to improve SNR of magneto-acoustic imaging. Simulations on the magneto-acoustic signal under different bit lengths M-sequence-coded excitation are performed. Experiments on the samples made of pork and graphite slices are done to validate the proposed coded excitation method. The SNR and sidelobe levels were investigated. The results showed when 7, 15, 31, 63, 127 bits M-sequence-coded excitations were applied onto the samples, SNR was improved by 17.4 dB, 24.2 dB, 30.6 dB, 37.6 dB, and 40.1 dB, respectively. For a similar SNR improvement, the total used time under coded excitation can be shortened to 9.4% under the single pulse excitation. The result indicates the M-sequence-coded excitation approach is effective to improve the magneto-acoustic signal SNR and shorten the imaging time. Graphical abstract SNR of the magneto-acoustic signal is significantly improved by the coded excitation than the pulse excitation, the reconstructed image of the front and back boundary of the pork can be seen clearly under the 7, 15, 31, 63, 127 bit M-sequence-coded excitations. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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