scholarly journals Microwave Imaging Sensor Using Low Profile Modified Stacked Type Planar Inverted F Antenna

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2949 ◽  
Author(s):  
Mohammad Islam ◽  
Md. Ullah ◽  
Touhidul Alam ◽  
Mandeep Singh ◽  
Mengu Cho
Keyword(s):  
Electromagnetic Waves ◽  
Microwave Imaging ◽  
Microwave Antenna ◽  
Copper Sheet ◽  
Tissue Phantom ◽  
Low Profile ◽  
Reflection And Transmission Coefficient ◽  
Breast Phantom ◽  
And Performance ◽  
Imaging Sensor

Microwave imaging is the technique to identify hidden objects from structures using electromagnetic waves that can be applied in medical diagnosis. The change of dielectric property can be detected using microwave antenna sensor, which can lead to localization of abnormality in the human body. This paper presents a stacked type modified Planar Inverted F Antenna (PIFA) as microwave imaging sensor. Design and performance analysis of the sensor antenna along with computational and experimental analysis to identify concealed object has been investigated in this study. The dimension of the modified PIFA radiating patch is 40 × 20 × 10 mm3. The reflector walls used, are 45 mm in length and 0.2-mm-thick inexpensive copper sheet is considered for the simulation and fabrication which addresses the problems of high expenses in conventional patch antenna. The proposed antenna sensor operates at 1.55–1.68 GHz where the maximum realized gain is 4.5 dB with consistent unidirectional radiation characteristics. The proposed sensor antenna is used to identify tumor in a computational human tissue phantom based on reflection and transmission coefficient. Finally, an experiment has been performed to verify the antenna’s potentiality of detecting abnormality in realistic breast phantom.

scholarly journals A Homogeneous Breast Phantom Measurement System with an Improved Modified Microwave Imaging Antenna Sensor

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2962 ◽  
Author(s):  
Mohammad Tariqul Islam ◽  
Md. Samsuzzaman ◽  
Md. Tarikul Islam ◽  
Salehin Kibria ◽  
Mandeep Jit Singh
Keyword(s):  
Measurement System ◽  
Breast Imaging ◽  
Imaging System ◽  
Microwave Imaging ◽  
Microwave Antenna ◽  
Phantom Measurement ◽  
Additional Tool ◽  
Sensor Performance ◽  
Breast Phantom ◽  
Microwave Breast Imaging

Microwave breast imaging has been reported as having the most potential to become an alternative or additional tool to the existing X-ray mammography technique for detecting breast tumors. Microwave antenna sensor performance plays a significant role in microwave imaging system applications because the image quality is mostly affected by the microwave antenna sensor array properties like the number of antenna sensors in the array and the size of the antenna sensors. In this paper, a new system for successful early detection of a breast tumor using a balanced slotted antipodal Vivaldi Antenna (BSAVA) sensor is presented. The designed antenna sensor has an overall dimension of 0.401λ × 0.401λ × 0.016λ at the first resonant frequency and operates between 3.01 to 11 GHz under 10 dB. The radiating fins are modified by etching three slots on both fins which increases the operating bandwidth, directionality of radiation pattern, gain and efficiency. The antenna sensor performance of both the frequency domain and time domain scenarios and high-fidelity factor with NFD is also investigated. The antenna sensor can send and receive short electromagnetic pulses in the near field with low loss, little distortion and highly directionality. A realistic homogenous breast phantom is fabricated, and a breast phantom measurement system is developed where a two antennas sensor is placed on the breast model rotated by a mechanical scanner. The tumor response was investigated by analyzing the backscattering signals and successful image construction proves that the proposed microwave antenna sensor can be a suitable candidate for a high-resolution microwave breast imaging system.

scholarly journals Nanoparticles in enhancing microwave imaging and microwave Hyperthermia effect for liver cancer treatment

2021 ◽  
Vol 60 (1) ◽  
pp. 223-236
Author(s):  
Walaa Maamoun ◽  
Mohamed I. Badawi ◽  
Ayman A Aly ◽  
Y. Khedr
Keyword(s):  
Silver Nanoparticles ◽  
Liver Cancer ◽  
Cancer Treatment ◽  
Electromagnetic Waves ◽  
Microwave Imaging ◽  
Healthy Tissue ◽  
Cancer Tissue ◽  
Hyperthermia Treatment ◽  
Hyperthermia Therapy ◽  
Surrounding Healthy Tissue

Abstract Hyperthermia therapy is a promising therapy for liver cancer treatment that utilizes external electromagnetic waves to heat the tumor zone to preferentially kill or minimize cancer cells. Nevertheless, it’s a challenge to realize localized heating of the cancer tissue without harming the surrounding healthy tissue. This research proposes to utilize nanoparticles as microwave absorbers to enhance microwave imaging and achieve localized hyperthermia therapy. A realistic 3D abdomen model has been segmented using 3D Slicer segmentation software, and then the obtained segmented CAD model exported to Computer Simulation Technology (CST STUDIO) for applying the Finite Element Modeling (FEM). Next investigating both imaging and treatment capability. Finally, the specific absorption rate (SAR) and temperature distribution were computed without nanoparticles and with different types of nanoparticles such as gold (GNPs) and silver nanoparticles at frequency 915 MHz. By comparing the achived results, it was seen that Silver nanoparticles can make a great enhancement in raising the temperature. However, this result was unsatisfactory but, after adding gold nanoparticles the temperature exceed 42°C, at frequency 915 MHz which is achieving the hyperthermia treatment without harming the nearby healthy tissue, GNPs also can achieve a great enhancement in SAR result

Potential Impact of RFID-Based Tracing Systems on the Integrity of Pharmaceutical Products

2012 ◽  
pp. 1724-1745
Author(s):  
Michele Maffia ◽  
Luca Mainetti ◽  
Luigi Patrono ◽  
Emanuela Urso
Keyword(s):  
Supply Chain ◽  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Electromagnetic Waves ◽  
Peptide Hormone ◽  
Pharmaceutical Products ◽  
Pharmaceutical Supply Chain ◽  
Rf Devices ◽  
And Performance ◽  
Auto Identification

Radio Frequency Identification (RFID) is going to play a crucial role as auto-identification technology in a wide range of applications such as healthcare, logistics, supply chain management, ticketing, et cetera. The use of electromagnetic waves to identify, trace, and track people or goods allows solving many problems related to auto-identification devices based on optical reading (i.e. bar code). Currently, high interest is concentrated on the use of Radio Frequency (RF) solutions in healthcare and pharmaceutical supply chain, in order to improve drugs flow transparency and patients’ safety. Unfortunately, there is a possibility that drug interaction with electromagnetic fields (EMFs) generated by RF devices, such as RFID readers, deteriorate the potency of bioactive compounds. This chapter proposes an experimental multidisciplinary approach to investigate potential alterations induced by EMFs on drug molecular structure and performance. To show the versatility of this approach, some experimental results obtained on two biological pharmaceuticals (peptide hormone-based) are discussed.

Design and Performance Study of a Novel Minimally Invasive Active Surgical Needle

2019 ◽  
Vol 13 (4) ◽  
Author(s):  
Zahra Khashei Varnamkhasti ◽  
Bardia Konh
Keyword(s):  
Experimental Tests ◽  
Needle Insertion ◽  
Integrated System ◽  
Performance Study ◽  
Medical Treatments ◽  
Tissue Phantom ◽  
Sma Actuator ◽  
Potential Improvement ◽  
And Performance ◽  
And Control

Abstract Many medical treatments such as brachytherapy, thermal ablation, and biopsy are performed using percutaneous needle-based procedures. The success of these procedures highly depends on accurate placement of the needle tip at target positions. A novel active needle was designed and developed in this work that can steer inside the tissue via a shape memory alloy (SMA) actuator attached to its body. With actuation and control offered by the actuator, the active needle can reach the target positions with more accuracy, and thereby potential improvement in clinical outcomes. An integrated system was also developed to robotically operate the active needle insertion. The performance of the active needle was evaluated with finite element methods and experimental tests on a fabricated prototype in air. Active needle insertion tests in a tissue phantom were also performed to evaluate the performance of the active needle. The deflection in air and tissue phantom demonstrated the capability of the active needle to reach target positions.

Selective Transmission of Electromagnetic Wave by Using Diamond Photonic Crystals with Graded Lattice Spacing

2006 ◽  
Vol 45 ◽  
pp. 1139-1144
Author(s):  
Soshu Kirihara ◽  
Yoshinari Miyamoto
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Electromagnetic Waves ◽  
Lattice Spacing ◽  
Three Dimensional ◽  
Dielectric Constants ◽  
Microwave Antenna ◽  
Diamond Structure ◽  
Band Calculation ◽  
Graded Lattice

Three-dimensional electromagnetic or photonic crystals with periodic variations of the dielectric constants were fabricated by using a rapid prototyping method called stereolithography. Millimeter-order epoxy lattices with a diamond structure were designed to reflect electromagnetic waves by forming an electromagnetic band gap in GHz range. Titania based ceramic particles were dispersed into the lattice to control the dielectric constant. The diamond lattice structures formed the perfect band gap reflecting electromagnetic waves for all directions. The location of the band gap agreed with the band calculation using the plane wave propagation method. The diamond structures with graded lattice spacing were successfully fabricated as well, resulting in the directional transmission of microwaves. The stretching ratio of the lattice spacing in the crystal structure was changed according to the electromagnetic band calculation. A microwave antenna head composed of the diamond structure with graded lattice spacing was fabricated which achieved the unidirectional transmission.

Airborne Multiwavelength Microwave Imaging Sensor

2005 ◽  
Author(s):  
I.V. Cherny ◽  
A.G. Fimov ◽  
G.Y. Gus'kov ◽  
N.N. Gorobetz ◽  
O.P. Ivanov ◽  
...  
Keyword(s):  
Microwave Imaging ◽  
Imaging Sensor
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