Diagnosed image of breast cancer by antenna MVDR beamforming algorithm with composites

Author(s):  
V. Nagaraju ◽  
Abhisek Sethy ◽  
Raja Sarath Kumar Boddu ◽  
S. Balambigai ◽  
K. Sakthisudhan
2008 ◽  
Vol 2008 ◽  
pp. 1-9 ◽  
Author(s):  
M. Klemm ◽  
I. J. Craddock ◽  
J. A. Leendertz ◽  
A. Preece ◽  
R. Benjamin

We have evaluated a modified delay-and-sum (DAS) beamforming algorithm for breast cancer detection with a microwave radar-based system. The improved DAS algorithm uses an additional weight factor calculated at each focal point to improve image quality. These weights essentially represent the quality of preprocessing and coherent radar operation. Using a multistatic UWB radar system based on a hemispherical antenna array, we present experimental detection of 7 mm and 10 mm phantom tumours. We show that the new proposed DAS algorithm improves signal-to-clutter ratio in focused images by 2.65 dB for 10 mm tumour, and by 4.4 dB for 7 mm tumour.


2015 ◽  
Vol 5 (4) ◽  
pp. 357-364 ◽  
Author(s):  
Yaozhang Sai ◽  
Mingshun Jiang ◽  
Qingmei Sui ◽  
Lei Jia ◽  
Shizeng Lu

1988 ◽  
Author(s):  
Adam W. Bojanczyk ◽  
Franklin T. Luk

2013 ◽  
Vol 22 (10) ◽  
pp. 1340027 ◽  
Author(s):  
LI XU ◽  
XIA XIAO ◽  
TAKAMARO KIKKAWA

Ultra-wide band (UWB) microwave imaging is a promising method for the breast cancer detection based on the large contrast of electric parameters between the malignant tumor and its surrounded normal organisms. In this paper, a two-dimensional model of the breast organisms is numerically carried by the finite difference time domain (FDTD) method. The dispersion characteristics of the breast media are taken into account by single pole Debye model to approach the actual properties of the breast organism. In this method, a tumor is assumed in the model with two cases. The standard Capon beamforming (SCB) and doubly constrained robust Capon beamforming (DCRCB) algorithm performed to reconstruct the image is described in detail. The tumor can be detected and localized using the proposed algorithm and the result demonstrates a good stability of DCRCB algorithm.


2017 ◽  
Vol 31 (09) ◽  
pp. 1750091 ◽  
Author(s):  
Ze-Kun Yang ◽  
Cong-Cong Cheng ◽  
Zhaobin Wang ◽  
Hong-Wei Yang

This paper is based on the general principle of beamforming algorithm of array signal processing. It gives a kind of high precision adaptive time-domain beamforming algorithm, uses ultra-wide band (UWB) microwave signal as an emission source applied to the human body in early breast cancer detection. In this paper, we build a two-dimensional, semicircle breast tissue model, use numerical simulation with finite-difference time-domain (FDTD) method for detection. The result shows the superiority of beamforming algorithm compared with that of confocal imaging algorithms and beamforming algorithms, especially to the Capon beamforming algorithm.


Author(s):  
Liangyu Fan ◽  
Xiaoqian Zhu ◽  
Jiahua Zhu ◽  
Zhuang Xie ◽  
Zhengliang Hu ◽  
...  

Author(s):  
G. Kasnic ◽  
S. E. Stewart ◽  
C. Urbanski

We have reported the maturation of an intracisternal A-type particle in murine plasma cell tumor cultures and three human tumor cell cultures (rhabdomyosarcoma, lung adenocarcinoma, and osteogenic sarcoma) after IUDR-DMSO activation. In all of these studies the A-type particle seems to develop into a form with an electron dense nucleoid, presumably mature, which is also intracisternal. A similar intracisternal A-type particle has been described in leukemic guinea pigs. Although no biological activity has yet been demonstrated for these particles, on morphologic grounds, and by the manner in which they develop within the cell, they may represent members of the same family of viruses.


Author(s):  
John L. Swedo ◽  
R. W. Talley ◽  
John H. L. Watson

Since the report, which described the ultrastructure of a metastatic nodule of human breast cancer after estrogen therapy, additional ultrastructural observations, including some which are correlative with pertinent findings in the literature concerning mycoplasmas, have been recorded concerning the same subject. Specimen preparation was identical to that in.The mitochondria possessed few cristae, and were deteriorated and vacuolated. They often contained particulates and fibrous structures, sometimes arranged in spindle-shaped bundles, Fig. 1. Another apparent aberration was the occurrence, Fig. 2 (arrows) of linear profiles of what seems to be SER, which lie between layers of RER, and are often recognizably continuous with them.It was noted that the structure of the round bodies, interpreted as within autophagic vacuoles in the previous communication, and of vesicular bodies, described morphologically closely resembled those of some mycoplasmas. Specifically, they simulated or reflected the various stages of replication reported for mycoplasmas grown on solid nutrient. Based on this observation, they are referred to here as “mycoplasma-like” structures, in anticipation of confirmatory evidence from investigations now in progress.


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