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3 results on '"highly directive proximity-coupled split-ring resonator"'

1. Head-compliant microstrip split ring resonator for non-invasive healing monitoring after craniosynostosis-based surgery

Author

Mauricio David Perez, Seung Hee Jeong, Sujith Raman, Daniel Nowinski, Zhigang Wu, Syaiful M.S. Redzwan, Jacob Velander, Zhiwei Peng, Klas Hjort, and Robin Augustine

Subjects
bone, phantoms, surgery, skin, elasticity, bending, biomechanics, paediatrics, split ring resonators, microstrip resonators, patient monitoring, liquid alloys, microwave resonators, biomedical equipment, bone grafts, calvarial defects, osteogenesis process, dielectric properties, resonance frequency, computational head models, head phantom models, human head, newborn children, defect area, monitoring systems, post-operative monitoring, bone healing, head-compliant microstrip split ring resonator, noninvasive healing monitoring, craniosynostosis-based surgery, soft proximity-coupled split-ring resonator, highly directive proximity-coupled split-ring resonator, copper, polydimethylsiloxane, liquid alloy, calvarial bone osteogenesis, computational software technology microwave studio-based simulation, head curvatures, skin elasticity, reconstructive surgical procedures, Medical technology, R855-855.5
Abstract

A soft and highly directive, proximity-coupled split-ring resonator fabricated with a liquid alloy, copper and polydimethylsiloxane (PDMS) is presented. The same was designed for sensing osteogenesis of calvarial bone. As dielectric properties of bone grafts in ossifying calvarial defects should change during the osteogenesis process, devices like this could monitor the gradual transformation of the defect into bone by differentiating changes in the dielectric properties as shifts in the resonance frequency. Computational Software Technology (CST) Microwave Studio®-based simulation results on computational head models were in good agreement with laboratory results on head phantom models, which also included the comparison with an in-vivo measurement on the human head. A discussion based on an inductive reasoning regarding dynamics’ considerations is provided as well. Since the skin elasticity of newborn children is high, stretching and crumpling could be significant. In addition, due to typical head curvatures in newborn children, bending should not be a significant issue, and can provide higher energy focus in the defect area and improve conformability. The present concept could support the development of soft, cheap and portable follow-up monitoring systems to use in outpatient hospital and home care settings for post-operative monitoring of bone healing after reconstructive surgical procedures.

Published
2019
Full Text
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2. Head-compliant microstrip split ring resonator for non-invasive healing monitoring after craniosynostosis-based surgery

Author

Perez, Mauricio D., Jeong, Seung Hee, Raman, Sujith, Nowinski, Daniel, Wu, Zhigang, Redzwan, Syaiful, Velander, Jacob, Peng, Zhiwei, Hjort, Klas, Augustine, Robin, Perez, Mauricio D., Jeong, Seung Hee, Raman, Sujith, Nowinski, Daniel, Wu, Zhigang, Redzwan, Syaiful, Velander, Jacob, Peng, Zhiwei, Hjort, Klas, and Augustine, Robin

Abstract

A soft and highly directive, proximity-coupled split-ring resonator fabricated with a liquid alloy, copper and polydimethylsiloxane (PDMS) is presented. The same was designed for sensing osteogenesis of calvarial bone. As dielectric properties of bone grafts in ossifying calvarial defects should change during the osteogenesis process, devices like this could monitor the gradual transformation of the defect into bone by differentiating changes in the dielectric properties as shifts in the resonance frequency. Computational Software Technology (CST) Microwave Studio (R)-based simulation results on computational head models were in good agreement with laboratory results on head phantom models, which also included the comparison with an in-vivo measurement on the human head. A discussion based on an inductive reasoning regarding dynamics' considerations is provided as well. Since the skin elasticity of newborn children is high, stretching and crumpling could be significant. In addition, due to typical head curvatures in newborn children, bending should not be a significant issue, and can provide higher energy focus in the defect area and improve conformability. The present concept could support the development of soft, cheap and portable follow-up monitoring systems to use in outpatient hospital and home care settings for post-operative monitoring of bone healing after reconstructive surgical procedures.

Published
2020
Full Text
View/download PDF

3. Head-compliant microstrip split ring resonator for non-invasive healing monitoring after craniosynostosis-based surgery

Author

Perez, Mauricio David, Jeong, Seung Hee, Raman, Sujith, Nowinski, Daniel, Wu, Zhigang, Redzwan, Syaiful M.S., Velander, Jacob, Peng, Zhiwei, Hjort, Klas, and Augustine, Robin

Subjects
skin, liquid alloy, Medical Materials, patient monitoring, monitoring systems, phantoms, resonance frequency, Orthopaedics, Medicinska material och protesteknik, bone, biomedical equipment, Article, biomechanics, skin elasticity, surgery, paediatrics, noninvasive healing monitoring, bone grafts, calvarial bone osteogenesis, calvarial defects, polydimethylsiloxane, Annan elektroteknik och elektronik, head phantom models, liquid alloys, osteogenesis process, human head, head-compliant microstrip split ring resonator, Other Electrical Engineering, Electronic Engineering, Information Engineering, newborn children, craniosynostosis-based surgery, computational software technology microwave studio-based simulation, computational head models, post-operative monitoring, bending, head curvatures, split ring resonators, reconstructive surgical procedures, dielectric properties, microwave resonators, copper, Ortopedi, elasticity, bone healing, highly directive proximity-coupled split-ring resonator, microstrip resonators, soft proximity-coupled split-ring resonator, defect area
Abstract

A soft and highly directive, proximity-coupled split-ring resonator fabricated with a liquid alloy, copper and polydimethylsiloxane (PDMS) is presented. The same was designed for sensing osteogenesis of calvarial bone. As dielectric properties of bone grafts in ossifying calvarial defects should change during the osteogenesis process, devices like this could monitor the gradual transformation of the defect into bone by differentiating changes in the dielectric properties as shifts in the resonance frequency. Computational Software Technology (CST) Microwave Studio (R)-based simulation results on computational head models were in good agreement with laboratory results on head phantom models, which also included the comparison with an in-vivo measurement on the human head. A discussion based on an inductive reasoning regarding dynamics' considerations is provided as well. Since the skin elasticity of newborn children is high, stretching and crumpling could be significant. In addition, due to typical head curvatures in newborn children, bending should not be a significant issue, and can provide higher energy focus in the defect area and improve conformability. The present concept could support the development of soft, cheap and portable follow-up monitoring systems to use in outpatient hospital and home care settings for post-operative monitoring of bone healing after reconstructive surgical procedures.

Published
2020

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