Phased-Array Near Field Radiometry for Brain Intracranial Applications

Abstract

Abstract-During the past decades there has been a tremendous increase throughout the scientific community for developing methods of understanding human brain functionality, as diagnosis and treatment of diseases and malfunctions, could be effectively developed through understanding of how the brain works. In parallel, research effort is driven on minimizing drawbacks of existing imaging techniques including potential risks from radiation and invasive attributes of the imaging methodologies. Towards that direction a new near field radiometry imaging system has been theoretically studied, developed and experimentally tested and all of the aforementioned research phases are herein presented. The system operation principle is based on the fact that human tissues emit chaotic thermal type radiation at temperatures above the absolute zero. Using a phase shifted antenna array system, spatial resolution, detection depth and sensitivity are increased. Combining previous research results, as well as new findings, the capabilities of the constructed system, as well as the possibility of using it as a complementary method for brain imaging are discussed in this paper.

Brain MR Image Classification Using Multiscale Geometric Analysis of Ripplet

“…It is not known beforehand which values of C and γ are the best for the classification problem at hand. Hence, various pairs of (C, γ) were tried with over the course of the CV procedure, and the one with the lowest CV error rate was picked, where C ∈ [1,10] and γ ∈ [1,3]. After finding the best values for the parameters C and γ, these values were used to train the LS-SVM model, and the test set was used to measure the error rate of the classification system.…”

“…Various researchers are not only trying to improve the MR image quality, but also seeking novel methods for easier and quicker inference from the images [5][6][7]. In recent years, MRI has emerged as one of the popular choice to study the human brain [8][9][10]. MRI can detect a variety of conditions of the brain such as cysts, tumors, bleeding, swelling, developmental and structural abnormalities, infections, inflammatory conditions, or problems with the blood vessels, etc..…”

A Novel Wideband Antenna Array With Tightly Coupled Octagonal Ring Elements

“…As broadband and multifunction electronic systems become more widespread in commercial and military applications, the interest and need for developing phased array antennas with multi-octave operating bandwidth and wide scan angle is increased [6][7][8][9][10]. Therefore, the problem of designing a phased array with good impedance matching and excellent scanning property over a wide frequency band is becoming an important topic in modern antenna array community.…”

Non Linear Optimization Technique for the Reduction of the Frequency Scanning Effect in a Phased Array Based on Broadband Injection-Locked Third Harmonic Self-Oscillating Mixers

“…For the design of antenna arrays with electronic beam-steering capabilities [1][2][3], low cost phase shifter circuits are required to control the phase distribution along the array. During the last few years, different approaches for the implementation of phase shifters have been proposed.…”