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Publications (10 of 15) Show all publications
Petrovic, N., Otterskog, M. & Risman, P. O. (2017). Breast tumor detection with microwave applicators in open air. In: 2017 IEEE Conference on Antenna Measurements & Applications (CAMA) CAMA 2017: . Paper presented at 2017 IEEE Conference on Antenna Measurements & Applications (CAMA) CAMA 2017, 03 Dec 2017, Tsumuba, Japan (pp. 272-274).
Open this publication in new window or tab >>Breast tumor detection with microwave applicators in open air
2017 (English)In: 2017 IEEE Conference on Antenna Measurements & Applications (CAMA) CAMA 2017, 2017, p. 272-274Conference paper, Published paper (Refereed)
Abstract [en]

A system for either direct use of diffraction phenomena or indirect use by computational methods for female breast tumor detection is described. The excitation device is a single external non-contacting, sectioned single turn loop, creating an axial magnetic field directed into the breast. A circulating current is created inside it and the diffracted field is directly sensed.

Keywords
microwave, coil antenna, surface wave, applicator, tumor detection, diffraction, deflection, E-field probe
National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-38651 (URN)10.1109/CAMA.2017.8273422 (DOI)000425256200076 ()2-s2.0-85046273190 (Scopus ID)978-1-5090-5028-4 (ISBN)
Conference
2017 IEEE Conference on Antenna Measurements & Applications (CAMA) CAMA 2017, 03 Dec 2017, Tsumuba, Japan
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2018-03-01 Created: 2018-03-01 Last updated: 2018-05-11Bibliographically approved
Petrovic, N., Otterskog, M. & Risman, P. O. (2017). Breast tumour detection by two microwave antenna principles. In: Proceedings of the 2017 19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017: . Paper presented at 19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017, 11 September 2017 through 15 September 2017 (pp. 1258-1261). Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>Breast tumour detection by two microwave antenna principles
2017 (English)In: Proceedings of the 2017 19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017, Institute of Electrical and Electronics Engineers Inc. , 2017, p. 1258-1261Conference paper, Published paper (Refereed)
Abstract [en]

A comparison between breast tumour detection with a traditional lossy coupling medium based system and a system without coupling medium is performed, by numerical modelling and experimentally. While a system with lossy coupling medium offers surface wave reduction and protection from surrounding sources and obstacles it also demands good permittivity matching of the coupling medium to the breast tissue under investigation, as well as a high performance measurement system with a dynamic range exceeding 100 dB. The system without coupling medium offers possible direct detection of inhomogeneities with transmission losses of about 50...60 dB. The proposed contacting antenna system however needs further development in order to reduce stray fields and adoption to realistic breast tissue properties.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2017
Keywords
Antennas, Surface waves, Tissue, Tumors, Antenna system, Breast tissue properties, Breast tissues, Coupling medium, Direct detection, Inhomogeneities, Performance measurement system, Transmission loss, Microwave antennas
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:mdh:diva-37414 (URN)10.1109/ICEAA.2017.8065500 (DOI)000426455500237 ()2-s2.0-85035132369 (Scopus ID)9781509044511 (ISBN)
Conference
19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017, 11 September 2017 through 15 September 2017
Available from: 2017-12-07 Created: 2017-12-07 Last updated: 2018-03-22Bibliographically approved
Forsberg, H., Lundqvist, K., Ekstrand, F. & Otterskog, M. (2017). Early Results and Ideas for Enhancements of the Master of Engineering Programme in Dependable Aerospace Systems. In: The 6th Development Conference for Swedish Engineering USIU2017: . Paper presented at The 6th Development Conference for Swedish Engineering USIU2017, 22 Nov 2017, Gothenburg, Sweden.
Open this publication in new window or tab >>Early Results and Ideas for Enhancements of the Master of Engineering Programme in Dependable Aerospace Systems
2017 (English)In: The 6th Development Conference for Swedish Engineering USIU2017, 2017Conference paper, Published paper (Refereed)
Abstract [en]

The five-year Master of Engineering Programme in Dependable Aerospace Systems, with dependability as its silver thread, started at Mälardalen University (MDH) in 2015. This paper presents selected ideas behind the creation of the programme, together with some preliminary analysis of current results and suggested enhancements for the programme’s fourth and fifth years.

Keywords
Dependability, Aerospace Systems, Unified Engineering, Undergraduate Research Opportunities
National Category
Educational Sciences
Identifiers
urn:nbn:se:mdh:diva-38620 (URN)
Conference
The 6th Development Conference for Swedish Engineering USIU2017, 22 Nov 2017, Gothenburg, Sweden
Projects
AVANS - civilingenjörsprogrammet i tillförlitliga flyg- och rymdsystem
Available from: 2018-03-06 Created: 2018-03-06 Last updated: 2018-03-06Bibliographically approved
Petrovic, N., Otterskog, M. & Risman, P. O. (2017). QUANTIFICATION OF INHOMOGENEITIES IN OBJECTS BY ELECTROMAGNETIC FIELDS. International applikation published under the patent cooperation treatu (PCT) .
Open this publication in new window or tab >>QUANTIFICATION OF INHOMOGENEITIES IN OBJECTS BY ELECTROMAGNETIC FIELDS
2017 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

A system and method, as well as sub assemblies thereof, for detection of dielectric irregularities/inhomogeneities inside an object under study (OUS) be means of electromagnetic energy are disclosed. The system comprises a loop/cylinder emitter configured to be located close to the OUS with its axis of symmetry directed towards the OUS. A feeding line feeds the emitter with an alternating current at an operating frequency to cause a magnetic field therein, which in turn will induce a propagating electromagnetic field in the OUS. In order to reduce propagating fields outside of the OUS, the circumference of the emitter is smaller than the free-space wavelength corresponding to the operating frequency, and the feeding line has a characteristic impedance that is smaller than 20 Ohm.

Place, publisher, year, edition, pages
International applikation published under the patent cooperation treatu (PCT), 2017
National Category
Engineering and Technology Computer Systems
Identifiers
urn:nbn:se:mdh:diva-38652 (URN)
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2018-03-01 Created: 2018-03-01 Last updated: 2018-03-01Bibliographically approved
Risman, P. O., Otterskog, M. & Petrovic, N. (2017). Översikt av mikrovågsbaserad diagnostik för brösttumörer och stroke. In: Medicinteknikdagarna 2017 MTD 2017: . Paper presented at Medicinteknikdagarna 2017 MTD 2017, 09 Oct 2017, Västerås, Sweden. Västerås, Sweden
Open this publication in new window or tab >>Översikt av mikrovågsbaserad diagnostik för brösttumörer och stroke
2017 (English)In: Medicinteknikdagarna 2017 MTD 2017, Västerås, Sweden, 2017Conference paper, Published paper (Refereed)
Abstract [en]

Forskningsområdet mikrovågsavbildning inom medicinen introducerades redan på 1980-talet av Larsen och Jacobi [1]. Objektet var en hundnjure nedsänkt i en mikrovågsabsorberande vätska (bolus) för att undvika störningar och direkt koppling mellan de två roterande antennmatriserna. Man fann att intressant mikrovågskontrastverkan kunde uppnås i biologiska objekt. Fördelar jämfört med mammografi är ex.vis att strålningen är helt ofarlig och att man kan »se» närmare revbenen. Nackdelen är att detaljbilden blir sämre om objektet är stort. Ett relativt enkelt sådant system har utvecklats på MDH [2]. System av denna typ innefattar krav på omfattande matematiska beräkningar för att få fram en bild. Idag anses den ledande utvecklingen ske av Meaney [3] som nu även tar fram ett system på Chalmers i Göteborg. System för stroke- och hjärnblödningsdetektion är under utveckling hos EMTensor i Österrike [4,5] och Medfield diagnostics i Göteborg [6]. Problemen med direkt vågutbredning med s.k. ytvågor längs skallytan blir stora eftersom man inte kan sänka ned skallen i vätska. Absorberande s.k. bolusar och även viss metallisk avskärmning (»huva») används av EM Tensor. En forskningsgrupp under Abbosh [7] har i laboratoriemiljö helt utan störningar lyckats uppnå vissa resultat utan bolusanvändning. Typiska antenner är modifierade kommunikationsantenner och man använder ett spektrum av frekvenser. Återigen blir systemen beräkningsintensiva. På MDH utvecklas f.n. två olika system. Det första har tredimensionella antenner och speciella åtgärder för eliminering av ytvågorna [8] samt kräver matematiska beräkningar som alla de föregående. Det andra bygger på en annan princip: polariserad direktdetektion av den. s.k. diffraktionen från exv. hjärnblödningsområdet och användning av vad som inte är antenner i vanlig mening [9]. Endast mycket enkel bildbehandling krävs, inte heller statistisk träning krävs för framtagning av slutdata så som tillämpas i exv. oljeindustrin för bestämning av olja/vatten/gas med mikrovågsteknik. Sammanfattningsvis karaktäriseras området av ett flertal aktiviteter, varav några pågått i många år. Orsaker till tidsutdräkterna är dels givetvis de allmänna svårigheterna med mikrovågsavbildning, men en ytterligare orsak är att mikrovågsvetenskapen och tekniken i sig är tvärvetenskaplig. En konsekvens av detta är att man inte tillräckligt tidigt ägnat sig åt de speciella ytvågs- och diffraktionsfenomen som kan förbättra mätresultaten.

Place, publisher, year, edition, pages
Västerås, Sweden: , 2017
National Category
Medical Engineering
Identifiers
urn:nbn:se:mdh:diva-38650 (URN)
Conference
Medicinteknikdagarna 2017 MTD 2017, 09 Oct 2017, Västerås, Sweden
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2018-03-02 Created: 2018-03-02 Last updated: 2018-03-02Bibliographically approved
Hozhabri, M., Otterskog, M., Petrović, N. & Ekström, M. (2016). Experimental Comparison Study of UWB Technologies for Static Human Detection. In: IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB 2016) ICUWB 2016: . Paper presented at IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB 2016) ICUWB 2016, 16 Oct 2016, Nanjing, China.
Open this publication in new window or tab >>Experimental Comparison Study of UWB Technologies for Static Human Detection
2016 (English)In: IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB 2016) ICUWB 2016, 2016Conference paper, Published paper (Refereed)
Abstract [en]

This paper compares two dominant Ultra Wide Rand(UWB) radar technologies Impulse and M-sequence for static human being detection in free space. The hardware and software platform for each system is described separately. These two radar platform performances are tested in real conditions and the results show that M-sequence UWB radar is better suited for detecting the static human target in larger distances.

National Category
Engineering and Technology Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:mdh:diva-33944 (URN)000391849700184 ()2-s2.0-85011039435 (Scopus ID)978-1-5090-1317-3 (ISBN)
Conference
IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB 2016) ICUWB 2016, 16 Oct 2016, Nanjing, China
Projects
ITS-EASY Post Graduate School for Embedded Software and SystemsESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2016-11-22 Created: 2016-11-21 Last updated: 2019-08-28Bibliographically approved
Ödman, T., Welinder, J., Andersson, N., Otterskog, M., Lindén, M., Ödman, N. & Larsson, C. (2015). A study of different fabrics to increase radar cross section of humans. In: Studies in Health Technology and Informatics, vol. 211: . Paper presented at 12th International Conference on Wearable Micro and Nano Technologies for Personalized Health, pHealth 2015, 2 June 2015 through 4 June 2015 (pp. 201-206).
Open this publication in new window or tab >>A study of different fabrics to increase radar cross section of humans
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2015 (English)In: Studies in Health Technology and Informatics, vol. 211, 2015, p. 201-206Conference paper, Published paper (Refereed)
Abstract [en]

This purpose of the study was to increase the visibility on radar for unprotected pedestrians with the aid of conducting fabric. The experiment comprised measurements of four types of fabric to determine the radio frequency properties, such as radar cross section (RCS) for the vehicle radar frequency 77 GHz and transmission (shielding) in the frequency range 3-18 GHz. Two different thicknesses of polypyrrole (PPy) nonvowen fabric were tested and one thickness for 30 % and 40 % stainless steel fabrics respectively. A jacket with the thinner nonvowen material and one with 40 % steel were tested and compared to an unmodified jacket in the RCS measurement. The measurement showed an increase in RCS of 4 dB for the jacket with the 40 % steel lining compared to the unmodified jacket. The transmission measurement was aimed at determining the fabric with the highest transmission of an incoming radio wave. The 30 % steel fabric and the two thicknesses of the nonvowen fabrics were tested. One practical application is for example the use of radar reflective material in search and rescue (SAR) clothes. The study showed that the 30 % steel fabric was the best candidate for further RCS measurements.

National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:mdh:diva-28795 (URN)10.3233/978-1-61499-516-6-201 (DOI)000455821300019 ()2-s2.0-84939244723 (Scopus ID)9781614995159 (ISBN)
Conference
12th International Conference on Wearable Micro and Nano Technologies for Personalized Health, pHealth 2015, 2 June 2015 through 4 June 2015
Available from: 2015-08-28 Created: 2015-08-28 Last updated: 2019-06-18Bibliographically approved
Petrovic, N., Otterskog, M. & Risman, P. O. (2015). Experiments and numerical modelling of contacting antenna applicators at a free space head model. In: 2015 IEEE International Conference on Antenna Measurements & Applications (CAMA) CAMA 2015: . Paper presented at 2015 IEEE International Conference on Antenna Measurements & Applications (CAMA) CAMA 2015, 30 Nov - 02 Dec. 2015, Chiang Mai, Thailand. , Article ID 7428125.
Open this publication in new window or tab >>Experiments and numerical modelling of contacting antenna applicators at a free space head model
2015 (English)In: 2015 IEEE International Conference on Antenna Measurements & Applications (CAMA) CAMA 2015, 2015, article id 7428125Conference paper, Published paper (Refereed)
Abstract [en]

Microwave absorbing boluses or similar are impractical, particularly in stroke emergencies, since the creation of surface waves around the head dominating over the internal signal paths is then a problem. The performance of miniaturised ridged waveguide applicators in the frequency interval 1 to 3 GHz designed for the application of breast cancer detection are used in this study, slightly modified, on head models for investigation of disturbing surface waves.

National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:mdh:diva-32797 (URN)10.1109/CAMA.2015.7428125 (DOI)000380437900016 ()2-s2.0-85006055105 (Scopus ID)978-1-4673-9149-8 (ISBN)
Conference
2015 IEEE International Conference on Antenna Measurements & Applications (CAMA) CAMA 2015, 30 Nov - 02 Dec. 2015, Chiang Mai, Thailand
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2016-09-01 Created: 2016-08-24 Last updated: 2019-06-25Bibliographically approved
Risman, P. O., Otterskog, M. & Petrovic, N. (2015). MICROWAVE ANTENNA APPLICATOR. International application published under the patent cooperation treaty (PCT) .
Open this publication in new window or tab >>MICROWAVE ANTENNA APPLICATOR
2015 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

A new and comparatively small type of open-ended microwave applicators has been disclosed. They are for example suitable for transmission into and reception from contacting objects such as protruding human bodyparts for inhomogeneity detection by tomographic methods. The applicators according to the invention are of the dielectric-filled open-ended ridged rectangular TE10 type, with an insert filling the ridge and having a higher permittivity than the surrounding space. The shape of the insert can be as a frustrum pyramid towards the opening. The overall design promotes narrow beamwidths and minimises nearfields and surface wave excitation.

Place, publisher, year, edition, pages
International application published under the patent cooperation treaty (PCT), 2015
National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-38653 (URN)
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2018-03-01 Created: 2018-03-01 Last updated: 2018-03-01Bibliographically approved
Petrovic, N., Otterskog, M. & Risman, P. O. (2014). Antenna applicator design for microwave imaging of the interior of human breasts. Journal of Physics D: Applied Physics, 47(38), Article ID Article Number: 385401.
Open this publication in new window or tab >>Antenna applicator design for microwave imaging of the interior of human breasts
2014 (English)In: Journal of Physics D: Applied Physics, ISSN 0022-3727, E-ISSN 1361-6463, Vol. 47, no 38, article id Article Number: 385401Article in journal (Refereed) Published
Abstract [en]

In this paper we introduce a waveguide antenna applicator design intended to be placed on the surface or in close proximity to a human breast for imaging purposes. Hence, the antenna needs to be compact for easy placement. The design process is carefully carried out dividing the antenna applicator into separate parts, allowing closer analysis towards improved synthesis. A mode applicator antenna was concluded to be necessary, employing a TE10 mode type with minimized near-field and surface (Zennek) wave excitation. Numerical simulations have been used throughout and show that the proposed ridged waveguide antenna is capable of fulfilling the design requirements and the performance goals. Modelling has been carried out using a scenario with a simple breast model and confirms the applicator's capability.

Keywords
antenna applicator, microwave imaging, microwave modelling
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:mdh:diva-26090 (URN)10.1088/0022-3727/47/38/385401 (DOI)000341771100017 ()2-s2.0-84946160940 (Scopus ID)
External cooperation:
Available from: 2014-10-10 Created: 2014-10-10 Last updated: 2017-12-05Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-3860-761X

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