[1]沈宜昕,郭各朴,孙晓冬,等.换能器指向性对磁感应磁声成像伪影的影响[J].南京师范大学学报(工程技术版),2016,16(04):001.[doi:10.3969/j.issn.1672-1292.2016.04.001]
　Shen Yixin,Guo Gepu,Sun Xiaodong,et al.Transducer Directivity Influence on Image Artifacts of MagnetoacousticTomography with Magnetic Induction[J].Journal of Nanjing Normal University(Engineering and Technology),2016,16(04):001.[doi:10.3969/j.issn.1672-1292.2016.04.001]
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换能器指向性对磁感应磁声成像伪影的影响
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南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
16卷
期数:
2016年04期
页码:
001
栏目:
电气与电子工程
出版日期:
2016-12-31

文章信息/Info

Title:
Transducer Directivity Influence on Image Artifacts of MagnetoacousticTomography with Magnetic Induction
文章编号:
1672-1292(2016)04-0001-07
作者:
沈宜昕1; 郭各朴1; 孙晓冬2; 马青玉1
(1.南京师范大学物理科学与技术学院,江苏 南京 210023)(2.中国电子科技集团公司第58研究所,江苏 无锡 214035)
Author(s):
Shen Yixin1; Guo Gepu1; Sun Xiaodong2; Ma Qingyu1
(1.School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China)(2.China Key System & Integrated Circuit Co.,Ltd.,Wuxi 214035,China)
关键词:
磁感应磁声成像; 换能器; 指向性; 伪影
Keywords:
MAT-MI; transducer; directivity; artifacts
分类号:
O426.2
DOI:
10.3969/j.issn.1672-1292.2016.04.001
文献标志码:
A
摘要:
磁感应磁声成像具有超声成像高分辨率和强穿透性、电阻抗成像高对比度的优点,在早期肿瘤诊疗方面有巨大的应用潜力. 本文针对电导率边界图像伪影问题,基于换能器接收特性和声偶极辐射原理,对双层偏心球状组织模型进行了磁声信号的仿真,分析了重建图像伪影的产生原因,并研究了换能器指向性与重建图像伪影的关系. 结果表明,随着换能器ka的增大,其接收特性接近单指向性,重建图像的伪影逐渐模糊直至消失,证明提高换能器指向性可有效抑制伪影的产生. 本研究为磁感应磁声成像中换能器的选择提供参考,也为其图像重建质量的提高提供了技术支持.
Abstract:
Magnetoacoustic tomography with magnetic induction(MAT-MI)has prosperous applied potential in early tumor diagnosis with the advantages of high spatial resolution and long penetration depth of sonography and the good contrast of electrical impedance tomography. To eliminate the image artifacts for MAT-MI,numerical simulations are conducted with a two-layer eccentric spherical tissue model,based on principles of acoustic dipole radiation and transducer reception. The generation of image artifacts in MAT-MI is analyzed and the influence of transducer directivity on image reconstruction is also achieved. The images reconstructed with different ka values prove that with the increase of ka,the transducer directivity is closer to a uni-directivity,resulting in reducing image artifacts until they disappear. This study provides the basis for transducer selection with improved image quality in MAT-MI.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-10-25.
基金项目:国家自然科学基金(11274176、11474166、11604156)、江苏省自然科学基金(BK20161013)、中国博士后科学基金(2016M591874)、江苏高校优势学科建设项目.
通讯联系人:马青玉,博士,教授,博士生导师,研究方向:电子技术、信息处理、声学. E-mail:maqingyu@njnu.edu.cn
更新日期/Last Update: 2016-12-31