The proposed system aims at overcoming the challenges of size, rigidity, and complex structures of existing systems. 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2007), Lyon, France, 23-26 August 2007. Materials and methods: The of the presented data was carried out during a search study of, Electromagnetic radiation influences in many ways humans and animals, while earthquakes are known to be related with electromagnetic phenomena. Unsupervised algorithm for brain anomalies localization in electromagnetic imaging. IEEE Transactions on Biomedical Engineering, 59 (4), 1068-1075. doi: 10.1109/TBME.2012.2182993, Trakic, Adnan, Eskandarnia, Neda, Li, Bing Keong, Weber, Ewald, Wang, Hua and Crozier, Stuart (2012). This paper presents simulation results of wave propagation in a anatomic realistic head phantom for the purpose of obtaining the feasibility of detecting brain matter affected by a simulated stroke. These approximations result in some undesirable effects in practice like reconstructing merely 2D images with limited accuracy, and manufacturing problems associated with selecting a suitable background matching medium with reasonable dielectric properties. and Wang, H. (2018). Piscataway, NJ, United States: IEEE (Institute for Electrical and Electronic Engineers). The number of transmit-receive (TX-RX) paths available for imaging are increased by performing a number of breast scans with varying array positions. results show that each method has its advantages; the DBIM shows faster Trakic, Adnan, Wang, Hua, Liu, Feng, Sanchez Lopez, Hector and Crozier, Stuart (2006). IEEE Transactions Biomedical Engineering, 61 (3) 6657819, 784-793. doi: 10.1109/TBME.2013.2289924, Modal analysis of currents induced by magnetic resonance imaging gradient coils, Sanchez, Hector, Poole, Michael, Trakic, Adnan, Freschi, Fabio, Smith, Elliot, Herbert, Jeremy, Fuentes, Miguel, Li, Yu, Tang, Fangfang, Repetto, Maurizio and Crozier, Stuart (2014). The FDTD simulations showed that tumors as small as 2 mm in diameter could be robustly detected in the presence of the background clutter generated by the heterogeneity of the surrounding normal tissue. Trakic, Adnan, Liu, Feng and Crozier, Stuart (2005). Journal Article: Unsupervised algorithm for brain anomalies localization in electromagnetic imaging, Brankovic, Aida, Zamani, Ali, Trakic, Adnan, Bialkowski, Konstanty, Mohammed, Beadaa, Cook, David, Walsham, James and Abbosh, Amin M. (2020). Multilayer integral method for simulation of eddy currents in thin volumes of arbitrary geometry produced by MRI gradient coils. Liu, Feng, Crozier, Stuart, Trakic, Adnan, Xu, Bin, Li, Bing Keong and Wei, Qing (2005). Expedited stroke imaging with electromagnetic polar sensitivity encoding. In addition there was a significant increase of admissions during a period of frequent small earthquakes, primarily among patients with bipolar disorder. Li, Bing Keong, Weber, Ewald, Bartel, Fabian, Morris, Dru, Engstrom, Craig, Trakic, Adnan, Wang, Hua, Kelly, Ben and Crozier, Stuart (2012). The polar sensitivity encoding (PSE) scheme is based on the fact that the … Requirements for diagnostic imaging in patients with ischemic stroke changed as a result of the 1995 study by the National Institute of Neurological Disorders and Stroke (NINDS) (, 1,, 2).Thrombolysis was introduced for the treatment of … In particular, a theoretical analysis, supported by numerical simulations and experiments, will be given to describe the physical constraints that arise in this kind of application and the relevant limitations. Portable lightweight electromagnetic head imaging systems for brain stroke detection are of great interest due to the need for fast and low-cost diagnosis tools. Improving the discrimination of benign and malignant breast MRI lesions using the apparent diffusion coefficient, McClymont, Darryl, Mehnert, Andrew, Trakic, Adnan, Crozier, Stuart and Kennedy, Dominic (2010). of form does not require homology of development) and was possibly co-opted from a preexisting asymmetrical chordate organ 262–280 The sensitivity of this technique to perfusion abnormalities in acute stroke ranged from 61% to 74% and the specificity ranged from 88% to 98% in 2 blinded, prospective, controlled trials (LOE: A). USA: International Society for Magnetic Resonance in Medicine. A method of microwave imaging via space-time (MIST) beamforming is proposed for detecting early-stage breast cancer. Patients and methods: chronic and severe psychiatric disorders varying in terms of etiology and treatment, i.e. In addition, we discuss the main aspects to be faced when implementing microwave imaging technology in a clinical scenario, by exploiting a design procedure to determine the number of antennas needed to capture, in a non-redundant way, the largest part of the available data. IEEE Transactions on Antennas and Propagation, 68 (12) 9103981, 8072-8081. doi: 10.1109/tap.2020.2996810, Autonomous microwave inspection systems for civil and marine industry, (2019–2022) Advance Queensland Industry Research Fellowships, Microwave Detection of Structural Degradations in Maritime Industry, Multimode optical waveguide characterisation facility, (2019) UQ Major Equipment and Infrastructure, Electromagnetic-based Imaging of Marine Infrastructure, Computer assisted detection and characterisation of breast cancer in MRI, Unsupervised algorithm for brain anomalies localization in electromagnetic imaging, Closing the gap of simulation to reality in electromagnetic imaging of brain strokes via deep neural networks, Expedited stroke imaging with electromagnetic polar sensitivity encoding, Flexible electromagnetic cap for head imaging, Alqadami, Abdulrahman S. M., Trakic, Adnan, Stancombe, Anthony E., Mohammed, Beadaa, Bialkowski, Konstanty S. and Abbosh, Amin M. (2020). The introduction of this MR term requires only slight modifications to the classical DBIM algorithm, and adds little computational complexity. ISMRM-ESMRMB Joint Annual Meeting 2010: Clinical Needs and Technological Solutions, Stockholm, Sweden, 1-7 May 2010. All inversion results are blind, but appropriate physical values for the reconstructed contrast are maintained. The comparison is based on a computational resource analysis, inversion of synthetic data, and inversion of experimentally collected data from both the Fresnel and UPC Barcelona data sets. A parallel FDTD scheme for electromagnetic analysis and design of MRI system. ISMRM 14th Scientific Meeting & Exhibition, Washington, USA, 6-12 May, 2006. Modal analysis of currents induced by magnetic resonance imaging gradient coils. The presented imaging results of a nonsparse model indicate that the proposed technique, in comparison with traditional microwave imaging or compressive-sensing (CS) algorithms, achieve very low normalized error rate (NER) at a short computational time using only small number of antennas. Coil arrangement for use in a magnetic resonance imaging system. authors (Int. 12 days IEEE Transactions on Antennas and Propagation. Crozier, Stuart, Trakic, Adnan, Wang, Hua and Liu, Feng (2007). 28th Annual International Conference IEEE Engineering in Medicine and Biology Society, New York, USA, 30 August - 3 September, 2006. California, USA: International Society for Magentic Resonance in Medicine (ISMRM). The resulting system is a helmet equipped with 24 antennas, whose performances have been numerically validated in terms of both spatial resolution and reconstruction capabilities, by employing full-wave numerical simulations, realistic 3-D phantoms of the human head and an accurate modeling of the actual antennas employed in the system. Open phased array knee coil for dynamic MSK MRI. A post-processing confocal algorithm is used to get an image of the phantom and to accurately detect the presence and location of the stroke. IEEE Transactions on Magnetics, 50 (2) 6749046, 7023404.1-7023404.4. doi: 10.1109/TMAG.2013.2282392, An analysis of the gradient-induced electric fields and current densities in human models when situated in a hybrid MRI-LINAC system, Liu, Limei, Trakic, Adnan, Sanchez-Lopez, Hector, Liu, Feng and Crozier, Stuart (2014). Imaging in patients with stroke | Explore the latest full-text research PDFs, articles, conference papers, preprints and more on STROKE IMAGING. IEEE Transactions on Biomedical Circuits and Systems, 14 (5) 9201335, 1097-1107. doi: 10.1109/TBCAS.2020.3025341, In vivo sensitivity estimation and imaging acceleration with rotating RF coil arrays at 7 Tesla, Li, Mingyan, Jin, Jin, Zuo, Zhentao, Liu, Feng, Trakic, Adnan, Weber, Ewald, Zhuo, Yan, Xue, Rong and Crozier, Stuart (2015). In this paper, a microwave‐based stroke localization and classification framework is proposed. Despite its recognized value in detecting and characterizing breast disease, X-ray mammography has important limitations that motivate the quest for alternatives to augment the diagnostic tools that are currently available to the radiologist. GPU Accelerated FDTD Solver and Its Application in B1-Shimming. 9977100. Specifically, it appears that the average relative permittivity of the breast as a whole correlates with radiologic breast density categorization and may be considerably higher than previously published values, which have been based on ex vivo tissue specimens. Acute ischemia constitutes approximately 80% of all strokes and is an important cause of morbidity and mortality in the United States (, 1).Before effective therapies were introduced for acute ischemic stroke, imaging was used primarily to exclude hemorrhage and other mimics of stroke, … Efficient hybrid imaging reconstruction of sensitivity encoding parallel imaging performed on rotating radiofrequency coil array. The received backscattered signals are passed through a space-time beamformer that is designed to image backscattered signal energy as a function of location. Application of Rotating RF Coil Array in B1 Shimming with Strict Local SAR Constraints. Despite having innumerable, Objective: 13th International Society for Magnetic Resonance in Medicine (ISMRM-2005), Miami Beach, Florida, USA, 7-13 May 2005. as often as from mutations, implying that genetic assimilation (“phenotype precedes genotype”) is a common mode of evolution. Those approximations include considering the imaging antennas as point sources, assuming homogeneity along one of the domain’s coordinate axes, and necessitating a background matching medium. For 2D transverse magnetic (TM) microwave inversion, multiplicative-regularized contrast source inversion (MR-CSI), and the distorted Born iterative method (DBIM) are compared. Expedited stroke imaging with electromagnetic polar sensitivity encoding. quickly enlarged thanks to the so-called spectral-domain stratified theory, and now they are ubiquitous in the mathematical models associated to many electromagnetic technologies, ranging from EMC lightning modelization and ground penetrating radar to optical and plasmonic integrated devices and going through the familiar microwave and millimeter-wave planar structures using printed circuit technology. Piscataway, NJ, U.S.A.: IEEE - Institute of Electrical Electronics Engineers Inc.. doi: 10.1109/IEMBS.2007.4352329, Modelling regulatory compliance of occupationally exposed MRI workers during gradient pulsing. ISMRM Workshop on Advances in High Field MRI, Asilomar Conference Center, Pacific Grove, California, 25-28 March, 2007. California, USA: International Society for Magentic Resonance in Medicine (ISMRM). Indications. A switching device is used to enable the antennas to sequentially send a wideband 1-4 GHz microwave signal and capture the backscattered signals. All rights reserved. Poole, Michael, Sanchez Lopez, Hector, Trakic, Adnan and Crozier, Stuart (2009). A wideband wearable electromagnetic (EM) head imaging system for brain stroke detection is presented. Joint Annual Meeting ISMRM-ESMRMB, Berlin, Germany, 19-25 May, 2007. Liu, F., Trakic, A., Sanchez Lopez, H., Weber, E. and Crozier, S. (2008). An orthogonality based RF decoupling method. In addition to population-level asymmetries, variability in brain asymmetry was related to sex, age, and intracranial volume. functionalities, these materials remain highly underutilised as their underlying atomistic mechanisms are vastly unexplored. The iterative Polak-Ribière nonlinear conjugate gradient algorithm is applied to the minimization of the cost function. New York, NY, U.S.A.: International Society of Magnetic Resonance in Medicine. High acceleration with a rotating radiofrequency coil array (RRFCA) in parallel magnetic resonance imaging (MRI), Li, Mingyan, Jin, Jin, Trakic, Adnan, Liu, Feng, Weber, Ewald, Li, Yu and Crozier, Stuart (2012). To reconstruct the internal scattered power intensity accurately, the average-trace subtraction method is used to remove the skin reflections and clutters. The beamformer forms a spatially filtered combination of time-delayed response of scattering points in the head exposed to microwave radiation over the band from 1 to 4 GHz.

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