نتایج جستجو برای: electrical impedance imaging

تعداد نتایج: 668248  

Journal: :Journal of physics. Conference series 2013
S Khan A Borsic Preston Manwaring Alexander Hartov Ryan Halter

Electrical Impedance Tomography (EIT) systems are used to image tissue bio-impedance. EIT provides a number of features making it attractive for use as a medical imaging device including the ability to image fast physiological processes (>60 Hz), to meet a range of clinical imaging needs through varying electrode geometries and configurations, to impart only non-ionizing radiation to a patient,...

Journal: :Physiological measurement 2010
A Borsic R Halter Y Wan A Hartov K D Paulsen

Transrectal electrical impedance tomography (TREIT) has been proposed as an adjunct modality for enhancing standard clinical ultrasound (US) imaging of the prostate. The proposed TREIT probe has an array of electrodes adhered to the surface of a cylindrical US probe that is introduced inside of the imaging volume. Reconstructing TREIT images in the open-domain geometry established with this tec...

Journal: :Chest 1994
S Kimura T Morimoto T Uyama Y Monden Y Kinouchi T Iritani

The electrical impedance of a pulmonary mass was measured in 53 patients of whom 44 had primary lung cancer, 5 had metastatic lung tumor, and 4 had organizing pneumonia. Because biologic tissue can be regarded, electrically, to consist of extracellular resistance (Re), intracellular resistance (Ri), and the electrical capacitance of the cell membrane (Cm), these three parameters were calculated...

Journal: :Physiological measurement 2006
Manuchehr Soleimani Camille Gómez-Laberge Andy Adler

Electrical impedance tomography (EIT) attempts to reconstruct the internal impedance distribution in a medium from electrical measurements at electrodes on the medium surface. One key difficulty with EIT measurements is due to the position uncertainty of the electrodes, especially for medical applications, in which the body surface moves during breathing and posture change. In this paper, we de...

Journal: :IEEE Transactions on Instrumentation and Measurement 2021

Electrical impedance tomography (EIT) is an emerging imaging modality to monitor 3D cell culture dynamics through reconstructing the electrical properties of clusters. Recently, machine-learning (ML)-based approaches have achieved significant gains for image reconstruction EIT against conventional physical model-based methods. However, continuous, multilevel conductivity distributions, which co...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2003
Glenn A. Wilson David Victor Thiel

The principle of numerically modeling the surface impedance of a homogeneous transverse magnetic (TM)-type plane wave incident upon an inhomogeneous half-space with inclined uniaxial electrical anisotropy as an equivalent half-space with fundamental electrical biaxial anisotropy is demonstrated. The self-consistent impedance method is introduced and shown to accurately model the surface impedan...

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