Confocal Imaging Using Ultra Wideband Antenna Array on Si Substrates for Breast Cancer Detection

Kubota, S.; Xiao, Xia; Sasaki, Nobuo; Kayaba, Yasuhisa; Kimoto, K.; Moriyama, W.; Kozaki, T.; Hanada, M.; Kikkawa, Takamaro

doi:10.1143/jjap.49.097001

Cited by 16 publications

(12 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Much of the work to date has involved computational studies based on 2D planar [13], cylindrical [18] and a few 3D spherical [19] FDTD models considering 5-15 mm size tumors [20][21][22] as well as CMI based experimental studies [12,13,23]. These studies are performed in 1-15 GHz frequency band, mostly utilizing 3-6 GHz frequency range.…”

Section: Introductionmentioning

confidence: 99%

Breast Tumor Detection and Classification Based on Microwave Imaging

Oral

Sahakian²

2022

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

View full text Add to dashboard Cite

Limitations caused by traditional breast cancer detection and screening techniques have encouraged researchers to investigate alternative solutions. This study examines the use of a microwave-based approach for tumor detection in breast tissue and related tumor type classification using matched-filtering. Radar-like confocal microwave imaging (CMI) method constructs the foundation of such tumor detection approach. In particular, a microwave pulse is first transmitted, then back-scattered pulses are collected. All major reflective sites in the breast tissue are detected by repeating this procedure on a microwave pulse transmission-reception grid, aligning captured signals in-time to focus on a particular region in the breast tissue and superimposing such time-shifted signals to improve signal-to-clutter level. In the observed signals, clutter is originated by the heterogeneity of the breast tissue while signal is originated by a tumor site as a function of its water content. All calculations, in the study, were performed computationally in terms of a 3D Finite-Difference Time-Domain (FDTD) simulation models. For the antenna system, two cross-polarized resistively loaded bow-ties antennas were used in the computational model, and the tumor site was modeled using five different size and morphologies. Matched-filtering, on the other hand, was performed matching such obtained observations with that of a homogenous breast tissue, namely clutter-free model. Performance of the proposed approach was tested for two different antenna array resolutions, and it was observed that this parameter is important for successful detection and classification of a tumor-site in a realistic heterogenous breast tissue model.

show abstract

Section: Introductionmentioning

confidence: 99%

Breast Tumor Detection and Classification Based on Microwave Imaging

Oral

Sahakian²

2022

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

View full text Add to dashboard Cite

show abstract

“…Actually, conventional imaging methods face difficulties arising from these issues [25][26][27]. Biomedical imaging based on the electromagnetic properties of biomedical tissues is considered to be an effective method because the electromagnetic properties of a malignant tumor and normal breast tissue are different [28].…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Imaging of Permittivity Distribution by an Activated Meta-Structure with a Functional Scanning Defect

2019

View full text Add to dashboard Cite

A novel 2D imaging method for permittivity imaging using a meta-structure with a functional scanning defect is proposed, working in the millimeter wave-range. The meta-structure we used here is composed of a perforated metal plate with subwavelength-holes and a needle-like conductor that can scan two-dimensionally just beneath the plate. The metal plate, which is referred to as a metal hole array (MHA) in this study, is known as a structure supporting propagation of spoof surface plasmon polaritons (SSPPs). High-frequency waves with frequencies higher than microwaves, including SSPPs, have the potential to detect signals from inner parts embedded beneath solid surfaces such as living cells or organs under the skin, without physical invasion, because of the larger skin depth penetration of millimeter wave-bands than optical wave-bands. Focused on activated SSPPs, the localized distortion of SSPP modes on an MHA is used in the proposed method to scan the electromagnetic properties of the MHA with a needle-like conductor (conductive probe), which is a kind of active defect-initiator. To show the validity of the proposed method, electromagnetic analyses of the localized distortions of wave fields were performed, and one- and two-dimensional imaging experiments were conducted with the aim of detecting both conductive and dielectric samples. The analytical results confirmed the localized distortion of the electric field distribution of SSPP modes and also indicated that the proposed method has scanning ability. In experimental studies, the detection of conductive and dielectric samples was successful, where the detected dielectrics contained pseudo-biological materials, with an accuracy on the order of millimeters. Finally, a biomedical diagnosis in the case of a rat lung is demonstrated by using the experimental system. These results indicate that the proposed method may be usable for non-invasive and low-risk biomedical diagnosis.

show abstract

“…UWB technologies have been applied to short range communication technology which transmits and receives the signals in the form of very short pulses such as Gaussian monocycle pulses (GMP) [2,3]. In order to develop a handheld screening system, we have proposed a compact mobile system in the supine position for breast cancer detection [4][5][6][7][8], in which generation and transmission of GMP signals have been achieved by complementary metal oxide semiconductor integrated circuits (CMOS-IC) [9,10].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Spatial Resolution of Breast Cancer Detection Using 4x4 UWB Antenna Array with Impedance Matching Layer

Sugitani¹,

Kubota²,

Xiao³

et al. 2013

Extended Abstracts of the 2013 International Conference on Solid State Devices and Materials

View full text Add to dashboard Cite

A 4x4 planar ultra-wideband (UWB) antenna array with a matching layer to breast skin and fat was developed for radar-based breast cancer detection system. The antenna array with the matching layer with a thickness of 0.25 mm and dielectric constant of 2.0 could improve the spatial resolution of two separate 5-mm-diameter spherical tumor phantoms, which were located at the depth of 22 mm with the spacing of 8 mm.

show abstract

Confocal Imaging Using Ultra Wideband Antenna Array on Si Substrates for Breast Cancer Detection

Cited by 16 publications

References 16 publications

Breast Tumor Detection and Classification Based on Microwave Imaging

Breast Tumor Detection and Classification Based on Microwave Imaging

Two-Dimensional Imaging of Permittivity Distribution by an Activated Meta-Structure with a Functional Scanning Defect

Improvement of Spatial Resolution of Breast Cancer Detection Using 4x4 UWB Antenna Array with Impedance Matching Layer

Contact Info

Product

Resources

About