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1.	Fhager, Andreas, 1976, et al. (author) Microwave Imaging for Mammography using an Iterative Time-Domain Reconstruction Algorithm; Initial Experiments 2005 In: Proceedings of the 16th International Zurich Symposium on Electromagnetic Compatibility; Topical Meetings. ; , s. 65--70- Conference paper (other academic/artistic)
2.	Fhager, Andreas, 1976, et al. (author) Potential benefits of using a priori data in reconstruction algorithms for microwave tomography 2006 In: Medicinteknikdagarna, 3-4 October 2006, Uppsala, Sweden. Conference paper (other academic/artistic)abstract Microwave tomography is rapidly developing into a promising imaging technique that could be useful in many different applications where a non-invasive detection of internal dielectric properties is required. Such a technique could for instance be useful in mammographical imaging for screening and follow up examinations of breast cancer tumours. Compared to x-ray mammography there is a potential significant benefit in using microwaves in the diagnosis of breast cancer tumours due to a significant contrast in the dielectric properties between tumour and surrounding tissue.Development of an efficient imaging reconstruction algorithm is a big challenge in the construction of an operational microwave tomograph. The algorithm has to be fast, accurate and robust. In this work results are presented showing how a priori dielectric data of the objects being reconstructed can be exploited to improve the convergence rate and the resolution of the reconstructed image. The work is based on a conjugate-gradient reconstruction algorithm and FDTD modelling of the electromagnetic wave propagation. For this work it has been modified to search for circular objects with given permittivity and conductivity. The results are promising and indicate that significantly improved reconstructions can be obtained. However to be practically viable further development of the algorithm need to be made in order to make it more robust and adaptive. Once that is made we plan to use this technique in a prototype that will be evaluated for clinical breast cancer imaging.
3.	Fhager, Andreas, 1976, et al. (author) Reconstruction Quality and Spectral Content of an Electromagnetic Time-Domain Inversion Algorithm 2006 In: IEEE Transactions on Biomedical Engineering. ; 53:8, s. 1594-1604 Journal article (peer-reviewed)
4.	Fhager, Andreas, 1976, et al. (author) Time-domain Image Reconstruction in an Experimental Prototype for Breast Cancer Detection 2006 In: Progress In Electromagnetics Research Symposium, 26–29 March, 2006, Cambridge, USA. Conference paper (other academic/artistic)
5.	Fhager, Andreas, 1976, et al. (author) Towards a mammographic microwave imaging experiment 2004 In: Proceedings of EMB 04 computational electromagnetics, methods and applications, Göteborg. ; , s. 132-136 Conference paper (other academic/artistic)
6.	Hashemzadeh, Parham, 1976, et al. (author) Experimental Investigation of an Optimization Approach to Microwave Tomography 2006 In: Electromagnetic Biology and Medicine. ; 25:1, s. 1-12 Journal article (peer-reviewed)
7.	Hashemzadeh, Parham, 1976, et al. (author) Experimental Results of an Optimization Approach to Two-Dimensional Time Domain electromagnetic inversion Problem with Application to Microwave Breast Tomography 2005 In: Proceedings of the IASTED International Conference on Biomedical Engineering, Innsbruck, Austria, 2005. Conference paper (other academic/artistic)
8.	Hashemzadeh, Parham, 1976, et al. (author) Imaging of metal prosteses in the human body experiments and simulations 2005 In: RVK 05, Linköping, Sweden, 2005. Conference paper (other academic/artistic)
9.	Candefjord, Stefan, 1981, et al. (author) A wearable microwave instrument can detect and monitor traumatic abdominal injuries in a porcine model 2021 In: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322 .- 2045-2322. ; 11:1 Journal article (peer-reviewed)abstract Abdominal injury is a frequent cause of death for trauma patients, and early recognition is essential to limit fatalities. There is a need for a wearable sensor system for prehospital settings that can detect and monitor bleeding in the abdomen (hemoperitoneum). This study evaluates the potential for microwave technology to fill that gap. A simple prototype of a wearable microwave sensor was constructed using eight antennas. A realistic porcine model of hemoperitoneum was developed using anesthetized pigs. Ten animals were measured at healthy state and at two sizes of bleeding. Statistical tests and a machine learning method were used to evaluate blood detection sensitivity. All subjects presented similar changes due to accumulation of blood, which dampened the microwave signal (p< 0.05). The machine learning analysis yielded an area under the receiver operating characteristic (ROC) curve (AUC) of 0.93, showing 100% sensitivity at 90% specificity. Large inter-individual variability of the healthy state signal complicated differentiation of bleedings from healthy state. A wearable microwave instrument has potential for accurate detection and monitoring of hemoperitoneum, with automated analysis making the instrument easy-to-use. Future hardware development is necessary to suppress measurement system variability and enable detection of smaller bleedings.
10.	Candefjord, Stefan, 1981, et al. (author) Developing a Wearable Microwave Instrument for Detecting Thorax Injuries – Tests On a Pneumothorax Phantom 2013 In: Medicinteknikdagarna 2013. Conference paper (other academic/artistic)

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Result 1-10 of 141

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Type of publication: conference paper (95); journal article (43); doctoral thesis (1); book chapter (1); licentiate thesis (1)

Type of content: peer-reviewed (106); other academic/artistic (35)

Author/Editor: Fhager, Andreas, 197 ... (141); Persson, Mikael, 195 ... (120); Zeng, Xuezhi, 1980 (28); Zirath, Herbert, 195 ... (17); Meaney, Paul M, 1960 (16); McKelvey, Tomas, 196 ... (12); show more...; Candefjord, Stefan, ... (12); Dobsicek Trefna, Han ... (12); Linner, Peter, 1945 (11); Hosseinzadegan, Sama ... (11); Gustafsson, Mats (10); Nordebo, Sven (10); Lui, Hoi-Shun, 1980 (10); Elam, Mikael, 1956 (10); Yu, Yinan, 1985 (8); Hashemzadeh, Parham, ... (8); Johansson, Markus, 1 ... (8); Rubaek, Tonny, 1979 (6); Stake, Jan, 1971 (5); Takook, Pegah, 1982 (5); Rydholm, Tomas, 1991 (5); Nilsson, Börje (4); Monteith, Albert, 19 ... (4); Geimer, Shireen D. (4); Kopecky, Rudolf, 197 ... (4); Karlsson, J-E (3); Bååth, Lars (3); Rylander, Thomas, 19 ... (3); Dahlbäck, Robin, 198 ... (3); Howard, John (3); Padhi, Shantanu (3); Padhi, S.K. (3); Chen, Chien-Chih, 19 ... (3); Guerrero Orozco, Lau ... (3); Nord, Lovisa, 1980 (3); Howard, J. (2); Kidborg, Stefan, 198 ... (2); Chodorowski, Artur, ... (2); Sjöqvist, Bengt-Arne ... (2); Lui, H (2); Buendia, Ruben, 1982 (2); Oropeza-Moe, Mariann ... (2); Andersen, Nina Gjerd ... (2); Oveland, Nils Petter (2); Ahmad, Malik Ahzaz, ... (2); Voronov, Alexey, 198 ... (2); Karlsson, Jan-Erik, ... (2); Qaiser, Mahmood, 198 ... (2); Sjödén, Therese (2); Trefna, Hana, 1979 (2); show less...

University: Chalmers University of Technology (141); Linnaeus University (10); Lund University (9); University of Gothenburg (7); RISE (1)

Language: English (141)

Research subject (UKÄ/SCB): Engineering and Technology (126); Natural sciences (42); Medical and Health Sciences (15)

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