Average Subtraction Method for Image Reconstruction of Brain using ECVT for Tumor Detection

Abstract

Brain Electrical Capacitance Volume Tomography (Brain ECVT) is a new technique that realizes real-time volumetric imaging of dynamic changes in electrical activity of the brain and allows total interrogation of the whole volume inside a helmet-shaped sensor. The technique has been used for investigating numerous brain functional abnormalities, including brain tumors, based on permittivity different from the tumor case, as compared to the normal brain. However, interpretation of the conventional Brain ECVT image is not practical for clinical purposes, as the image resolutions are high in the cortical area and lower in the middle region. The technique provides relatively good sensitivity when the tumor is located near the cortex. In this study, we developed a novel method, namely the average subtraction technique, to process the reconstructed image of the brain obtained by Brain ECVT. The technique generates a three-dimensional intracranial distribution of permittivity that correlates with the electrical activity map of the brain with improved resolution in the center region of the brain. The technique provides better insight into brain intracranial electrical activity, which is quite distinctive when there is tumor development inside the brain. The technique may lead to better detection of brain tumors inside the brain based on the electrical activity scan.

Dynamic cerebral blood flow assessment based on electromagnetic coupling sensing and image feature analysis

“…In contrast to traditional methodologies that solely detect changes in either electrical conductivity or the dielectric constant, a more reliable extraction of pulsatile CBF can be achieved through a combined detection of electrical coupling and magnetic induction in the near-field range. The electric coupling equivalent circuit, predominantly used for detecting changes in the dielectric constant of the subject, exhibits high sensitivity, albeit with compromised penetration capabilities ( Maharani et al, 2020 ). Conversely, magnetic induction, capable of penetrating the skull, allows the measurement of brain tissue’s electrical conductivity by gauging the disturbances of induced eddy currents within the intracranial region.…”

Application of Neuroimaging Technology in Military

“…The capability of Brain ECVT to measure brain functions in a deeper layer is shown by the successful results in capturing brain tumors (Maharani, Edison, Ihsan, & Taruno, 2020). It has the same potential as fMRI or MEG with advantages of practicality and mobility.…”