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Tomasic, I., Petrovic, N., Lindén, M. & Rashkovska, A. (2019). Comparison of publicly available beat detection algorithms performanances on the ECGs obtained by a patch ECG device. In: Koricic, M Butkovic, Z Skala, K Car, Z CicinSain, M Babic, S Sruk, V Skvorc, D Ribaric, S Gros, S Vrdoljak, B Mauher, M Tijan, E Pale, P Huljenic, D Grbac, TG Janjic, M (Ed.), 2019 42ND INTERNATIONAL CONVENTION ON INFORMATION AND COMMUNICATION TECHNOLOGY, ELECTRONICS AND MICROELECTRONICS (MIPRO): . Paper presented at 2019 42ND INTERNATIONAL CONVENTION ON INFORMATION AND COMMUNICATION TECHNOLOGY, ELECTRONICS AND MICROELECTRONICS (MIPRO) (pp. 275-278). IEEE
Open this publication in new window or tab >>Comparison of publicly available beat detection algorithms performanances on the ECGs obtained by a patch ECG device
2019 (English)In: 2019 42ND INTERNATIONAL CONVENTION ON INFORMATION AND COMMUNICATION TECHNOLOGY, ELECTRONICS AND MICROELECTRONICS (MIPRO) / [ed] Koricic, M Butkovic, Z Skala, K Car, Z CicinSain, M Babic, S Sruk, V Skvorc, D Ribaric, S Gros, S Vrdoljak, B Mauher, M Tijan, E Pale, P Huljenic, D Grbac, TG Janjic, M, IEEE , 2019, p. 275-278Conference paper, Published paper (Refereed)
Abstract [en]

Eight ECG beat detection algorithms, from the PhysioNet's WFDR and Cardiovascular Signal toolboxes, were tested on twenty measurements, obtained by the Savvy patch ECG device, for their accuracy in beat detection. On each subject, one measurement is obtained while sitting and one while running. Each measurement lasted from thirty seconds to one minute. The measurements obtained while running were more challenging for all the algorithms, as most of them almost perfectly detected all the beats on the measurements obtained in sitting position. However, when applied on the measurements obtained while running, all the algorithms have performed with decreased accuracy. Considering overall percentage of the faulty detected peaks, the four best algorithms were jqrs, from the Cardiovascular Signal Toolbox, and ecgpuwave, gqrs, and wqrs, from the WEDB Toolbox, with percentages of faulty detected beats 1.7, 2.3, 2.9, and 3, respectively.

Place, publisher, year, edition, pages
IEEE, 2019
Keywords
Patch ECG, R-peaks, heat detection, heart rate, telemonitoring, remote health monitoring
National Category
Medical Engineering
Identifiers
urn:nbn:se:mdh:diva-45375 (URN)000484544500052 ()978-953-233-098-4 (ISBN)
Conference
2019 42ND INTERNATIONAL CONVENTION ON INFORMATION AND COMMUNICATION TECHNOLOGY, ELECTRONICS AND MICROELECTRONICS (MIPRO)
Available from: 2019-10-03 Created: 2019-10-03 Last updated: 2019-10-03Bibliographically approved
Tomasic, I., Petrovic, N., Lindén, M. & Rashkovska, A. (2019). Comparison of publicly available beat detection algorithms performances on the ECGs obtained by a patch ECG device. In: 2019 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2019 - Proceedings: . Paper presented at 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2019, 20 May 2019 through 24 May 2019 (pp. 275-278). Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>Comparison of publicly available beat detection algorithms performances on the ECGs obtained by a patch ECG device
2019 (English)In: 2019 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2019 - Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2019, p. 275-278Conference paper, Published paper (Refereed)
Abstract [en]

Eight ECG beat detection algorithms, from the PhysioNet's WFDB and Cardiovascular Signal toolboxes, were tested on twenty measurements, obtained by the Savvy patch ECG device, for their accuracy in beat detection. On each subject, one measurement is obtained while sitting and one while running. Each measurement lasted from thirty seconds to one minute. The measurements obtained while running were more challenging for all the algorithms, as most of them almost perfectly detected all the beats on the measurements obtained in sitting position. However, when applied on the measurements obtained while running, all the algorithms have performed with decreased accuracy. Considering overall percentage of the faulty detected peaks, the four best algorithms were jqrs, from the Cardiovascular Signal Toolbox, and ecgpuwave, gqrs, and wqrs, from the WFDB Toolbox, with percentages of faulty detected beats 1.7, 2.3, 2.9, and 3, respectively. 

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2019
Keywords
Beat detection, Heart rate, Patch ECG, R-peaks, Remote health monitoring, Telemonitoring, Electrocardiography, Microelectronics, Telemedicine, Heart rates, Tele-monitoring, Signal detection
National Category
Other Medical Engineering Medical Laboratory and Measurements Technologies Signal Processing Medical Equipment Engineering
Identifiers
urn:nbn:se:mdh:diva-45016 (URN)10.23919/MIPRO.2019.8756769 (DOI)2-s2.0-85070300696 (Scopus ID)9789532330984 (ISBN)
Conference
42nd International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2019, 20 May 2019 through 24 May 2019
Available from: 2019-08-15 Created: 2019-08-15 Last updated: 2019-08-15Bibliographically approved
Petrovic, N., Tomasic, I., Lindén, M. & Risman, P. O. (2019). Detection of Human Bodypart Abnormalities by Microwaves – A New Approach. In: 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics MIPRO 2019: . Paper presented at 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics MIPRO 2019, 20 May 2019, Opatija, Croatia (pp. 270-274).
Open this publication in new window or tab >>Detection of Human Bodypart Abnormalities by Microwaves – A New Approach
2019 (English)In: 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics MIPRO 2019, 2019, p. 270-274Conference paper, Published paper (Refereed)
Abstract [en]

We present modified antenna-like devices - applicators - for direct detection of internal inhomogeneities such as breast tumours and brain haemorrhages, at a frequency about 1 GHz. This direct detection provides the possibility of using a simple microwave generator and simple rectification and position registration of the received signals. Direct readouts are thus possible, without any massive computing resources as with tomographic imaging. The transmitting applicator is non-contacting and in free air close to the object. It generates an essentially quasistatic axial magnetic field which induces a circular electric field in the tissue. The receiving 3D contacting applicator contains a high-permittivity ceramic and is resonant. Its mode field provides the desired polarisation sensitivity and filters out the main electric field. The overall system sensitivity for detection of internal inhomogeneities is accomplished by optimised use of the orthogonality of the primary magnetic, induced electric, and diffracted electric fields. When developments are completed, the system will replace or complement existing commercial technologies at a low cost.

National Category
Engineering and Technology Computer Systems
Identifiers
urn:nbn:se:mdh:diva-43939 (URN)10.23919/MIPRO.2019.8757093 (DOI)000484544500051 ()2-s2.0-85070266490 (Scopus ID)
Conference
42nd International Convention on Information and Communication Technology, Electronics and Microelectronics MIPRO 2019, 20 May 2019, Opatija, Croatia
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2019-06-20 Created: 2019-06-20 Last updated: 2019-10-03Bibliographically approved
Petrovic, N., Pichot, C. & Risman, P. O. (2019). Further Developments of Applicator Concepts for Detection of Body Part Inhomogeneities. In: 2019 IEEE CAMA Conference on Antenna Measurement and Applications 2019 CAMA: . Paper presented at 2019 IEEE CAMA Conference on Antenna Measurement and Applications 2019 CAMA, 22 Oct 2019, Denpasar, Bali, Indonesia.
Open this publication in new window or tab >>Further Developments of Applicator Concepts for Detection of Body Part Inhomogeneities
2019 (English)In: 2019 IEEE CAMA Conference on Antenna Measurement and Applications 2019 CAMA, 2019Conference paper, Published paper (Refereed)
Abstract [en]

We present significant improvements on in particular our transmitting applicator and its performance. This is a crucial component of our system for direct detection of internal inhomogeneities such as breast tumors and brain hemorrhages by a special transmitting applicator and specially polarized receiving applicators. The operating frequency is about 1 GHz. The transmitting applicator is unique by no need to contact the object under study (OUS) and does not generate any surface waves at it. The primary field has properties behaving as from a magnetic monopole. The overall system allows direct detection without a need for phase measurements, which provides the possibility of using a simple microwave generator and simple rectification and position registration of the received signals. The receiving 3D contacting applicator contains a high-permittivity ceramic and is resonant in order to provide the desired field polarization sensitivity. The desired system properties are achieved by optimized use of the orthogonality properties of the primary magnetic, induced electric, and diffracted electric fields.

Keywords
Microwaves, applicators, diffraction, bolus liquid, detection, medical application.
National Category
Engineering and Technology Computer Systems
Identifiers
urn:nbn:se:mdh:diva-46318 (URN)
Conference
2019 IEEE CAMA Conference on Antenna Measurement and Applications 2019 CAMA, 22 Oct 2019, Denpasar, Bali, Indonesia
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2019-12-12 Created: 2019-12-12 Last updated: 2019-12-12Bibliographically approved
Risman, P. O., Petrovic, N., Tomasic, I. & Lindén, M. (2019). New work on radiofrequency electric and electromagnetic leakage hazards for operators safety assessments. In: Medicinteknikdagarna 2019 MTD 2019: . Paper presented at Medicinteknikdagarna 2019 MTD 2019, 02 Oct 2019, Linköping, Sweden.
Open this publication in new window or tab >>New work on radiofrequency electric and electromagnetic leakage hazards for operators safety assessments
2019 (English)In: Medicinteknikdagarna 2019 MTD 2019, 2019Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Various medical and industrial equipment types with electric fields having frequencies in the range 13 to 40 MHz have a long history. The relative simplicity of the generators and applicators (i.e. the assembly which is adapted for the treatment) have led to equipment manufacturing by many small companies having insufficient knowledge about human exposure hazards. The international regulations on maximum allowed exposure are not well-developed and mainly concern limits of the measured electric field, so-called reference levels, which are set to low values considered to be safe under all possible conditions. – Quite some scientific work on the field characteristics has been carried out since the 1970’s, the goal in many cases having been to motivate further research grants rather than assisting industry in improving safety by proposing more detailed regulations. In particular, researchers have used the electric field strengths as measured, without consideration of the field curvature and decay rate from the equipment, and by also using a too simplistic approach to the “power flux density” of the field emission. – As a consequence of the above, it is estimated that over 90 % of today’s operational equipment does not fulfill these simple regulations. In spite of that, very few incidents or accidents are reported. – New ongoing work by the International Electrotechnical Commission (IEC; committee 27) is now explaining this. The work is based on advanced numerical modelling of typical kinds of equipment and humans in different postures of arms and hands. Some results will be demonstrated and indicate that from five to more than twenty times stronger fields can be accepted under conditions of limited direct access to the energised equipment parts such as electrodes and rails, and proper design of the system grounding.

National Category
Engineering and Technology Medical Engineering
Identifiers
urn:nbn:se:mdh:diva-46317 (URN)
Conference
Medicinteknikdagarna 2019 MTD 2019, 02 Oct 2019, Linköping, Sweden
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2019-12-12 Created: 2019-12-12 Last updated: 2019-12-12Bibliographically approved
Petrovic, N. & Risman, P. O. (2018). A Zirconia Cylindrical TM010 Cavity for Permittivity Measurements at 1 GHz. In: 2018 IEEE CAMA Conference on Antenna Measurement and Applications CAMA 2018: . Paper presented at 2018 IEEE CAMA Conference on Antenna Measurement and Applications CAMA 2018, 02 Sep 2018, Västerås, Sweden.
Open this publication in new window or tab >>A Zirconia Cylindrical TM010 Cavity for Permittivity Measurements at 1 GHz
2018 (English)In: 2018 IEEE CAMA Conference on Antenna Measurement and Applications CAMA 2018, 2018Conference paper, Published paper (Refereed)
Abstract [en]

The most accurate dielectric measurements are made by resonant cavity methods, the circular TM010 type being the simplest and most common. However, an airfilled such cavity at 1 GHz needs to be 250 mm in diameter. There is another problem as well: its limited applicability with very lossy samples, due to a too low Q value. This paper describes the development and properties of a metalized zirconia ceramic cavity for use at about 1 GHz. With its permittivity ε′ = 30 its diameter becomes 40 mm instead of 150 mm for the airfilled version. Additionally and importantly, the dynamic range of the loss factor ε″ is greatly expanded. The calibration procedure using numerical retromodelling is described and a measurement example of a ternary alcohol mixture is carried out. The accuracy is also estimated.

National Category
Engineering and Technology Computer Systems
Identifiers
urn:nbn:se:mdh:diva-41728 (URN)10.1109/CAMA.2018.8530482 (DOI)2-s2.0-85058314267 (Scopus ID)978-1-5386-5795-9 (ISBN)
Conference
2018 IEEE CAMA Conference on Antenna Measurement and Applications CAMA 2018, 02 Sep 2018, Västerås, Sweden
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2018-12-20Bibliographically approved
Risman, P. O. & Petrovic, N. (2018). Arch-Trapped Propagation in Enclosed and Free Space Biological Objects. In: 2018 IEEE CAMA Conference on Antenna Measurement and Applications CAMA 2018: . Paper presented at 2018 IEEE CAMA Conference on Antenna Measurement and Applications CAMA 2018, 02 Sep 2018, Västerås, Sweden.
Open this publication in new window or tab >>Arch-Trapped Propagation in Enclosed and Free Space Biological Objects
2018 (English)In: 2018 IEEE CAMA Conference on Antenna Measurement and Applications CAMA 2018, 2018Conference paper, Published paper (Refereed)
Abstract [en]

The tendency of arch-trapped microwave propagation at curved surfaces is a kind of diffraction which needs more attention in the development of measurement systems, from the oil industry to the investigations using antenna applicator systems for biological objects. We develop equations for propagation in very lossy substances in metal pipes. Similar such propagation occurs at the periphery of rounded objects in air, where also surface wave effects occur and can cause measurement problems. We show a modified contacting antenna applicator minimizing arch-trapped as well as surface waves.

National Category
Engineering and Technology Computer Systems
Identifiers
urn:nbn:se:mdh:diva-41729 (URN)10.1109/CAMA.2018.8530610 (DOI)2-s2.0-85058292798 (Scopus ID)978-1-5386-5795-9 (ISBN)
Conference
2018 IEEE CAMA Conference on Antenna Measurement and Applications CAMA 2018, 02 Sep 2018, Västerås, Sweden
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2018-12-20Bibliographically approved
Hozhabri, M., Risman, P. O. & Petrovic, N. (2018). Comparison of UWB Radar Back-Scattering by the Human Torso and a Phantom. In: : . Paper presented at The International Conference on Antenna Measurement and Applications – 2018 IEEE CAMA.
Open this publication in new window or tab >>Comparison of UWB Radar Back-Scattering by the Human Torso and a Phantom
2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

An Ultra Wide Band(UWB) radar is used to measure the cross section of a human phantom indifferent polarizations of the receiver antenna. The choice of material and shape for the human phantom is discussed. The material used in the experiment(wet sand) dielectric properties measured by a retromodeling technique and then calculated by mixture formulas. The appropriate frequency choice for the application is discussed.

Keywords
Ultra Wide Band, Radar, Human Detection, Phantom, Mie Scattering, Complex Permittivity
National Category
Engineering and Technology Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:mdh:diva-41309 (URN)10.1109/CAMA.2018.8530483 (DOI)2-s2.0-85058273104 (Scopus ID)
Conference
The International Conference on Antenna Measurement and Applications – 2018 IEEE CAMA
Available from: 2018-11-09 Created: 2018-11-09 Last updated: 2019-08-28Bibliographically approved
Tomasic, I., Petrovic, N., Fotouhi, H., Björkman, M. & Lindén, M. (2018). IoT enabled monitoring of patients’ environmental parameters supported by OpenWSN, OpenMote, and relational databases. In: Medicinteknikdagarna 2018 MTD 2018: . Paper presented at Medicinteknikdagarna 2018 MTD 2018, 08 Oct 2018, Umeå, Sweden.
Open this publication in new window or tab >>IoT enabled monitoring of patients’ environmental parameters supported by OpenWSN, OpenMote, and relational databases
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2018 (English)In: Medicinteknikdagarna 2018 MTD 2018, 2018Conference paper, Published paper (Refereed)
National Category
Engineering and Technology Medical Engineering
Identifiers
urn:nbn:se:mdh:diva-41739 (URN)
Conference
Medicinteknikdagarna 2018 MTD 2018, 08 Oct 2018, Umeå, Sweden
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2018-12-19 Created: 2018-12-19 Last updated: 2018-12-19Bibliographically approved
Fotouhi, H., Vahabi, M., Tomasic, I., Petrovic, N., Björkman, M. & Lindén, M. (2018). IPv6 connectivity in eHealth IoT networks. In: Medicinteknikdagarna 2018 MTD 2018: . Paper presented at Medicinteknikdagarna 2018 MTD 2018, 08 Oct 2018, Umeå, Sweden. Umeå, Sweden
Open this publication in new window or tab >>IPv6 connectivity in eHealth IoT networks
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2018 (English)In: Medicinteknikdagarna 2018 MTD 2018, Umeå, Sweden, 2018Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Umeå, Sweden: , 2018
National Category
Engineering and Technology Medical Engineering
Identifiers
urn:nbn:se:mdh:diva-41738 (URN)
Conference
Medicinteknikdagarna 2018 MTD 2018, 08 Oct 2018, Umeå, Sweden
Projects
ESS-H - Embedded Sensor Systems for Health Research Profile
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2018-12-18Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-2457-3079

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