Case Report: Preliminary Images From an Electromagnetic Portable Brain Scanner for Diagnosis and Monitoring of Acute Stroke

Introduction: Electromagnetic imaging is an emerging technology which promises to provide a mobile, and rapid neuroimaging modality for pre-hospital and bedside evaluation of stroke patients based on the dielectric properties of the tissue. It is now possible due to technological advancements in materials, antennae design and manufacture, rapid portable computing power and network analyses and development of processing algorithms for image reconstruction. The purpose of this report is to introduce images from a novel, portable electromagnetic scanner being trialed for bedside and mobile imaging of ischaemic and haemorrhagic stroke.Methods: A prospective convenience study enrolled patients (January 2020 to August 2020) with known stroke to have brain electromagnetic imaging, in addition to usual imaging and medical care. The images are obtained by processing signals from encircling transceiver antennae which emit and detect low energy signals in the microwave frequency spectrum between 0.5 and 2.0 GHz. The purpose of the study was to refine the imaging algorithms.Results: Examples are presented of haemorrhagic and ischaemic stroke and comparison is made with CT, perfusion and MRI T2 FAIR sequence images.Conclusion: Due to speed of imaging, size and mobility of the device and negligible environmental risks, development of electromagnetic scanning scanner provides a promising additional modality for mobile and bedside neuroimaging.

Sectorial Scanning Electromagnetic Defectoscope: The Next Stage in Well Integrity Diagnostics

The paper presents a new technology for the oil and gas industry for azimuthal electromagnetic scanning of the first tubular wall defects, the basis of which is a small-sized sector scanning tool that measures the pipe wall thickness. The paper presents the results of laboratoryand well tests, as well as the early field surveys using this technology. These constitute thebasis on which the actual sensitivity of the technology and its prospects in diagnosing well integrity are determined.

OBTAINING AND AUTOMATIC DATA PROCESSING FROM ELECTROMAGNETIC SCANNING OF ROAD PAVEMENTS WITH SUBSEQUENT VISUALIZATION

Рассмотрены вопросы получения и автоматизации обработки данных электромагнитного сканирования дорожной одежды с последующей визуализацией. В качестве инженерного оборудования для георадарного обследования использован георадар «ОКО». В результате сбора и анализа данных электромагнитного сканирования выявлены деструктивные участки дорожного покрытия. На основании изучения методов обработки, интерпретации визуализации данных георадарного сканирования принято решение о необходимости разработки специализированных средств автоматизации анализа таких данных при сканировании дорожных конструкций. Произведен анализ методов и средств, используемых для обработки данных радарограмм, рассмотрены структура файла хранения данных электромагнитного сканирования и доступные в программе «GeoScan32» средства обработки и конвертации данных. Предложена последовательность действий для реализации процедуры поиска трасс, характеризующихся недопустимым уровнем отклонения характеристик сигнала от средних значений The article discusses the issues of obtaining and automatic data processing from electromagnetic scanning of road pavements with subsequent visualization. Georadar "OKO" was used as engineering equipment for georadar survey. As a result of collecting and analyzing the electromagnetic scanning data, destructive sections of the road surface were identified. Based on the study of processing methods, interpretation and visualization of GPR scanning data, we decided that it is necessary to develop specialized tools for automating the analysis of such data when scanning road structures. The analysis of the methods and means used for processing the radarogram data was carried out, the structure of the file for storing the data of electromagnetic scanning and the means of processing and converting data available in the GeoScan32 program were considered. A sequence of actions was proposed to implement the procedure for searching for traces characterized by an unacceptable level of deviation of signal characteristics from the average values