A. Hurshkainen, A. Nikulin, S. Glybovski, I. Melchakova, P. Belov, B. Larrat, E. Georget, S. Enoch, L. Neves, P. Sabouroux, R. Abdeddaim
{"title":"周期线阵列的杂交特征模式及其在临床前MRI射频线圈中的应用","authors":"A. Hurshkainen, A. Nikulin, S. Glybovski, I. Melchakova, P. Belov, B. Larrat, E. Georget, S. Enoch, L. Neves, P. Sabouroux, R. Abdeddaim","doi":"10.1109/PIERS.2017.8262394","DOIUrl":null,"url":null,"abstract":"In this contribution we discuss the application of periodic structures composed of resonant metal strips in radio-frequency coils for preclinical multi-nuclei magnetic resonance imaging (MRI). For these multi-wire structures we numerically demonstrate a variety of hybridized eigenmodes calculating their magnetic field patterns and discuss their selective excitation. We show that by properly exciting two particular eigenmodes with a small non-resonant loop feed one can construct a dual-frequency coil for MRI. The field of view of the coil at both frequencies is determined by the magnetic field patterns of the selected modes, as shown by full-wave numerical simulations. The choice of the excited eigenmodes determines the field penetration depths into a scanned subject at the corresponding resonant frequencies. Moreover, in this work we discuss miniaturization of multi-wire resonators by capacitive loading of strips.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hybridized eigenmodes of periodic wire arrays and their application in radiofrequency coils for preclinical MRI\",\"authors\":\"A. Hurshkainen, A. Nikulin, S. Glybovski, I. Melchakova, P. Belov, B. Larrat, E. Georget, S. Enoch, L. Neves, P. Sabouroux, R. Abdeddaim\",\"doi\":\"10.1109/PIERS.2017.8262394\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this contribution we discuss the application of periodic structures composed of resonant metal strips in radio-frequency coils for preclinical multi-nuclei magnetic resonance imaging (MRI). For these multi-wire structures we numerically demonstrate a variety of hybridized eigenmodes calculating their magnetic field patterns and discuss their selective excitation. We show that by properly exciting two particular eigenmodes with a small non-resonant loop feed one can construct a dual-frequency coil for MRI. The field of view of the coil at both frequencies is determined by the magnetic field patterns of the selected modes, as shown by full-wave numerical simulations. The choice of the excited eigenmodes determines the field penetration depths into a scanned subject at the corresponding resonant frequencies. Moreover, in this work we discuss miniaturization of multi-wire resonators by capacitive loading of strips.\",\"PeriodicalId\":387984,\"journal\":{\"name\":\"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-05-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/PIERS.2017.8262394\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PIERS.2017.8262394","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Hybridized eigenmodes of periodic wire arrays and their application in radiofrequency coils for preclinical MRI
In this contribution we discuss the application of periodic structures composed of resonant metal strips in radio-frequency coils for preclinical multi-nuclei magnetic resonance imaging (MRI). For these multi-wire structures we numerically demonstrate a variety of hybridized eigenmodes calculating their magnetic field patterns and discuss their selective excitation. We show that by properly exciting two particular eigenmodes with a small non-resonant loop feed one can construct a dual-frequency coil for MRI. The field of view of the coil at both frequencies is determined by the magnetic field patterns of the selected modes, as shown by full-wave numerical simulations. The choice of the excited eigenmodes determines the field penetration depths into a scanned subject at the corresponding resonant frequencies. Moreover, in this work we discuss miniaturization of multi-wire resonators by capacitive loading of strips.