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Träfflista för sökning "WFRF:(Fhager Andreas 1976 ) "

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Numrering	Referens	Omslagsbild	Hitta
1.	Fhager, Andreas, 1976, et al. (författare) Microwave Imaging for Mammography using an Iterative Time-Domain Reconstruction Algorithm; Initial Experiments 2005 Ingår i: Proceedings of the 16th International Zurich Symposium on Electromagnetic Compatibility; Topical Meetings. ; , s. 65--70- Konferensbidrag (övrigt vetenskapligt/konstnärligt)
2.	Fhager, Andreas, 1976, et al. (författare) Potential benefits of using a priori data in reconstruction algorithms for microwave tomography 2006 Ingår i: Medicinteknikdagarna, 3-4 October 2006, Uppsala, Sweden. Konferensbidrag (övrigt vetenskapligt/konstnärligt)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. (författare) Reconstruction Quality and Spectral Content of an Electromagnetic Time-Domain Inversion Algorithm 2006 Ingår i: IEEE Transactions on Biomedical Engineering. ; 53:8, s. 1594-1604 Tidskriftsartikel (refereegranskat)
4.	Fhager, Andreas, 1976, et al. (författare) Time-domain Image Reconstruction in an Experimental Prototype for Breast Cancer Detection 2006 Ingår i: Progress In Electromagnetics Research Symposium, 26–29 March, 2006, Cambridge, USA. Konferensbidrag (övrigt vetenskapligt/konstnärligt)
5.	Fhager, Andreas, 1976, et al. (författare) Towards a mammographic microwave imaging experiment 2004 Ingår i: Proceedings of EMB 04 computational electromagnetics, methods and applications, Göteborg. ; , s. 132-136 Konferensbidrag (övrigt vetenskapligt/konstnärligt)
6.	Hashemzadeh, Parham, 1976, et al. (författare) Experimental Investigation of an Optimization Approach to Microwave Tomography 2006 Ingår i: Electromagnetic Biology and Medicine. ; 25:1, s. 1-12 Tidskriftsartikel (refereegranskat)
7.	Hashemzadeh, Parham, 1976, et al. (författare) Experimental Results of an Optimization Approach to Two-Dimensional Time Domain electromagnetic inversion Problem with Application to Microwave Breast Tomography 2005 Ingår i: Proceedings of the IASTED International Conference on Biomedical Engineering, Innsbruck, Austria, 2005. Konferensbidrag (övrigt vetenskapligt/konstnärligt)
8.	Hashemzadeh, Parham, 1976, et al. (författare) Imaging of metal prosteses in the human body experiments and simulations 2005 Ingår i: RVK 05, Linköping, Sweden, 2005. Konferensbidrag (övrigt vetenskapligt/konstnärligt)
9.	Candefjord, Stefan, 1981, et al. (författare) A wearable microwave instrument can detect and monitor traumatic abdominal injuries in a porcine model 2021 Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322 .- 2045-2322. ; 11:1 Tidskriftsartikel (refereegranskat)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. (författare) Developing a Wearable Microwave Instrument for Detecting Thorax Injuries – Tests On a Pneumothorax Phantom 2013 Ingår i: Medicinteknikdagarna 2013. Konferensbidrag (övrigt vetenskapligt/konstnärligt)

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Typ av publikation: konferensbidrag (95); tidskriftsartikel (43); doktorsavhandling (1); bokkapitel (1); licentiatavhandling (1)

Typ av innehåll: refereegranskat (106); övrigt vetenskapligt/konstnärligt (35)

Författare/redaktör: 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); visa fler...; 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); visa färre...

Lärosäte: Chalmers tekniska högskola (141); Linnéuniversitetet (10); Lunds universitet (9); Göteborgs universitet (7); RISE (1)

Språk: Engelska (141)

Forskningsämne (UKÄ/SCB): Teknik (126); Naturvetenskap (42); Medicin och hälsovetenskap (14)

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