Near-field diffraction tomography

被引：8
|
作者：
Mensah, S [1 ]
Ferriere, R [1 ]
机构：
[1] CNRS, Lab Mecan & Acoust, F-13402 Marseille 20, France
来源：
ULTRASONIC IMAGING | 2002年 / 24卷 / 01期
关键词：
diffraction tomography FDTD; mammography; near-field;
D O I：
10.1177/016173460202400102
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
We propose an algorithm that deals with broadband ultrasonic signals acquired in the near-field domain using probes close to the skin. This technique is designed for diffraction tomography of compact support objects interrogated by spherical waves (small transducers). It is an approximate inversion procedure in the Born approximation based on elliptical backprojection. Near-field imaging is enhanced by reducing the geometrical distortion observed on standard tomography. Numerical tests based on finite difference time domain (FDTD) simulations of data scattered by a tissue-like phantom are given.
引用
收藏
页码：13 / 24
页数：12
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