Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition最新文献
{"title":"Quadrature RF array using High Impedance concept for improved transmit RF field B<sub>1</sub> efficiencyat 7 Tesla.","authors":"Komlan Payne, Xiaoliang Zhang","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":74549,"journal":{"name":"Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition","volume":"30 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9445054/pdf/nihms-1832423.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33447654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aditya Ashok Bhosale, Leslie L Ying, Xiaoliang Zhang
{"title":"A 15-channel End-coated Half-wave Dipole Antenna Array System for Foot/Ankle/Calf Imaging at 7T.","authors":"Aditya Ashok Bhosale, Leslie L Ying, Xiaoliang Zhang","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":74549,"journal":{"name":"Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition","volume":"30 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11343013/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142054151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aditya Ashok Bhosale, Leslie L Ying, Xiaoliang Zhang
{"title":"Design of a 13-Channel hybrid RF array with field rectification of dielectric material for foot/ankle imaging at 7T.","authors":"Aditya Ashok Bhosale, Leslie L Ying, Xiaoliang Zhang","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":74549,"journal":{"name":"Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition","volume":"30 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9444995/pdf/nihms-1832427.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33447652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Decoupling performance between coil elements is one of the factors that limits the transmit B1 field efficiency and SNR. However, mutual coupling between coil elements is an inevitable electromagnetic interaction that alters the isolated current distribution and impedance of individual elements. In contrast to linear arrays, decoupling challenge of quadrature arrays is more pronounced. In the pursuit of low inter-coupling, a high-impedance technique is adopted. A quadrature hybrid coil composed of loop and microstrip is used in a planar configuration. By employing the high-impedance method, sufficient decoupling between quadrature coils is obtained without the use of additional decoupling network.
{"title":"Quadrature RF array using High Impedance concept for improved transmit RF field B1 efficiencyat 7 Tesla.","authors":"Komlan Payne, Xiaoliang Zhang","doi":"10.58530/2022/4061","DOIUrl":"https://doi.org/10.58530/2022/4061","url":null,"abstract":"Decoupling performance between coil elements is one of the factors that limits the transmit B1 field efficiency and SNR. However, mutual coupling between coil elements is an inevitable electromagnetic interaction that alters the isolated current distribution and impedance of individual elements. In contrast to linear arrays, decoupling challenge of quadrature arrays is more pronounced. In the pursuit of low inter-coupling, a high-impedance technique is adopted. A quadrature hybrid coil composed of loop and microstrip is used in a planar configuration. By employing the high-impedance method, sufficient decoupling between quadrature coils is obtained without the use of additional decoupling network.","PeriodicalId":74549,"journal":{"name":"Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44529056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Parallel imaging using quadrature coil arrays can help to reach their ultimate intrinsic signal-to-noise ratio (uiSNR) and higher spatial resolution at ultra-high fields, because quadrature RF coils provide higher sensitivity and reduced excitation power over the commonly used linear polarized RF transceivers. However, due to the complicated structure and difficulties in achieving sufficient electromagnetic decoupling, it is technically challenging in designing multichannel quadrature RF coil arrays, particularly at ultrahigh fields. In this work, we design and investigate the magnetic wall decoupled common-mode differential mode quadrature RF arrays for ultrahigh field 7T MR imaging applications.
{"title":"Investigation of Magnetic Wall Decoupling for planar Quadrature RF Array coils using Common-Mode Differential-mode Resonators.","authors":"Komlan Payne, Salik Inayat Khan, Xiaoliang Zhang","doi":"10.58530/2022/4504","DOIUrl":"https://doi.org/10.58530/2022/4504","url":null,"abstract":"Parallel imaging using quadrature coil arrays can help to reach their ultimate intrinsic signal-to-noise ratio (uiSNR) and higher spatial resolution at ultra-high fields, because quadrature RF coils provide higher sensitivity and reduced excitation power over the commonly used linear polarized RF transceivers. However, due to the complicated structure and difficulties in achieving sufficient electromagnetic decoupling, it is technically challenging in designing multichannel quadrature RF coil arrays, particularly at ultrahigh fields. In this work, we design and investigate the magnetic wall decoupled common-mode differential mode quadrature RF arrays for ultrahigh field 7T MR imaging applications.","PeriodicalId":74549,"journal":{"name":"Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41936008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Magnetic resonance imaging for Musculoskeletal imaging plays a vital role in the early detection of various abnormalities. New array systems designed explicitly for Musculoskeletal imaging at Ultra-high field strengths are being developed rapidly. In this study, we propose a new 8-channel array system consisting of High-permittivity dielectric material-coated half-wave dipole antennas for knee imaging at Ultra-high field 7 Tesla.
{"title":"An 8-Channel High-permittivity Dielectric Material-Coated Half-Wave Dipole Antenna Array for Knee Imaging at 7T.","authors":"Aditya Bhosale, L. Ying, Xiaoliang Zhang","doi":"10.58530/2022/4105","DOIUrl":"https://doi.org/10.58530/2022/4105","url":null,"abstract":"Magnetic resonance imaging for Musculoskeletal imaging plays a vital role in the early detection of various abnormalities. New array systems designed explicitly for Musculoskeletal imaging at Ultra-high field strengths are being developed rapidly. In this study, we propose a new 8-channel array system consisting of High-permittivity dielectric material-coated half-wave dipole antennas for knee imaging at Ultra-high field 7 Tesla.","PeriodicalId":74549,"journal":{"name":"Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46326571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aditya Ashok Bhosale, Leslie L Ying, Xiaoliang Zhang
{"title":"An 8-Channel High-permittivity Dielectric Material-Coated Half-Wave Dipole Antenna Array for Knee Imaging at 7T.","authors":"Aditya Ashok Bhosale, Leslie L Ying, Xiaoliang Zhang","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":74549,"journal":{"name":"Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition","volume":"30 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9445071/pdf/nihms-1832428.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33447657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Hairpin Radio Frequency Coil Array with High Inter-channel isolation for 7T Magnetic Resonance Imaging.","authors":"Komlan Payne, Xiaoliang Zhang","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":74549,"journal":{"name":"Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition","volume":"30 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9445059/pdf/nihms-1832420.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33447651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation of Magnetic Wall Decoupling for planar Quadrature RF Array coils using Common-Mode Differential-mode Resonators.","authors":"Komlan Payne, Salik Inayat Khan, Xiaoliang Zhang","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":74549,"journal":{"name":"Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition","volume":"30 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9445056/pdf/nihms-1832414.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33447659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Samantha E. Seymour, R. Rava, Mitchell Chudzik, K. Snyder, Muhammad E Waqas, J. Davies, Elad E Levy, Adnan E Siddiqui, Xiaoliang Zhang, Ciprian E Ionita
Intracranial hemorrhage (ICH) is bleeding within the cranium and occurs within the brain tissue, ventricles, and intracranial space. Hematoma expansion following an ICH has been related to increased mortality and morbidity inpatients. To detect ICH patients at risk, machine learning models can be used to predict whether or not hematoma expansion will occur. This study aims to assess the feasibility of machine learning prediction models using a radiomics approach. The highest sensitivity results indicated as 95% confidence intervals are 0.68 ± 0.004 and 0.72 ± 0.004, were achieved by support vector machine and logistic regression classifier models, respectively.
{"title":"Predicting Hematoma Expansion after Spontaneous Intracranial Hemorrhage Through a Magnetic Resonance-Based Radiomics Model.","authors":"Samantha E. Seymour, R. Rava, Mitchell Chudzik, K. Snyder, Muhammad E Waqas, J. Davies, Elad E Levy, Adnan E Siddiqui, Xiaoliang Zhang, Ciprian E Ionita","doi":"10.58530/2022/4892","DOIUrl":"https://doi.org/10.58530/2022/4892","url":null,"abstract":"Intracranial hemorrhage (ICH) is bleeding within the cranium and occurs within the brain tissue, ventricles, and intracranial space. Hematoma expansion following an ICH has been related to increased mortality and morbidity inpatients. To detect ICH patients at risk, machine learning models can be used to predict whether or not hematoma expansion will occur. This study aims to assess the feasibility of machine learning prediction models using a radiomics approach. The highest sensitivity results indicated as 95% confidence intervals are 0.68 ± 0.004 and 0.72 ± 0.004, were achieved by support vector machine and logistic regression classifier models, respectively.","PeriodicalId":74549,"journal":{"name":"Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43268750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition
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