This paper briefly summarizes the development of magnetic resonance imaging and spectroscopy in medicine.Aspects of magnetic resonancephysics and-technology relevant at ultra-high magnetic fields as well as current li...This paper briefly summarizes the development of magnetic resonance imaging and spectroscopy in medicine.Aspects of magnetic resonancephysics and-technology relevant at ultra-high magnetic fields as well as current limitations are highlighted.Based on the first promising studies,potential clinical applications at 7 Tesla are suggested.Other aims are to stimulate awareness of the potential of ultra-high field magnetic resonance and to stimulate active participation in much needed basic or clinical research at 7 Tesla or higher.展开更多
An experimental and numerical study on the temperature field induced in the ultra-high frequency induction heating is carried out.With an aim of predicting the thermal history of the workpiece,the influence factors of...An experimental and numerical study on the temperature field induced in the ultra-high frequency induction heating is carried out.With an aim of predicting the thermal history of the workpiece,the influence factors of temperature field,such as the induction frequency,the dimension of coil and the gap between coil and workpiece,are investigated considering temperature-dependent material properties by using FLUX 2Dsoftware.The temperature field characteristic in ultra-high induction heating is obtained and discussed.The numerical values are compared with the experimental results.A good agreement between them is observed with 7.9% errors.展开更多
缺血性脑卒中的病因分型对临床治疗决策和预后判断有重要价值。近年来,随着高分辨率磁共振血管壁成像(high-resolution vessel wall magnetic resonance imaging,HR-VW-MRI)在脑卒中临床研究和实践中的应用增加,7 T MRI以其更高信噪比...缺血性脑卒中的病因分型对临床治疗决策和预后判断有重要价值。近年来,随着高分辨率磁共振血管壁成像(high-resolution vessel wall magnetic resonance imaging,HR-VW-MRI)在脑卒中临床研究和实践中的应用增加,7 T MRI以其更高信噪比和更优图像质量,可发现脑血管早期、细微的病理变化,为深入了解各种脑血管疾病的病理机制提供了新思路。然而,超高场强也存在B1场不均、扫描时间长等技术挑战。本文就7 T HR-VW-MRI在缺血性卒中病因分型及临床应用中的进展进行综述,深入分析7 T HR-VW-MRI在提升临床诊断精确性与指导临床治疗中的潜在价值,为临床实践与科研探索提供参考。展开更多
超高场磁共振(ultra-high-field magnetic resonance,UHF-MR)对疾病诊断和细微结构显示一直是临床研究热点。但由于其固有特性,7 T UHF-MR的研究目前主要集中在中枢神经及部分骨肌系统疾病中。而5 T UHF-MR的问世,似乎为骨肌及全身系统...超高场磁共振(ultra-high-field magnetic resonance,UHF-MR)对疾病诊断和细微结构显示一直是临床研究热点。但由于其固有特性,7 T UHF-MR的研究目前主要集中在中枢神经及部分骨肌系统疾病中。而5 T UHF-MR的问世,似乎为骨肌及全身系统的超高场成像带来了新的可能性。本文重点对UHF-MR的固有物理特性对骨肌系统疾病诊断的影响及UHF-MR在骨肌系统疾病中的临床研究进展展开综述,旨在增强医师对UHF-MR的了解,拓宽研究者的思路,进一步推动新型对比剂的开发、多模态成像技术的应用以及人工智能辅助诊断的结合,促进UHF-MR在骨肌系统疾病中的临床转化及应用。展开更多
文摘This paper briefly summarizes the development of magnetic resonance imaging and spectroscopy in medicine.Aspects of magnetic resonancephysics and-technology relevant at ultra-high magnetic fields as well as current limitations are highlighted.Based on the first promising studies,potential clinical applications at 7 Tesla are suggested.Other aims are to stimulate awareness of the potential of ultra-high field magnetic resonance and to stimulate active participation in much needed basic or clinical research at 7 Tesla or higher.
基金Supported by the National Science and Technology Major Project of China(2012ZX04003081)
文摘An experimental and numerical study on the temperature field induced in the ultra-high frequency induction heating is carried out.With an aim of predicting the thermal history of the workpiece,the influence factors of temperature field,such as the induction frequency,the dimension of coil and the gap between coil and workpiece,are investigated considering temperature-dependent material properties by using FLUX 2Dsoftware.The temperature field characteristic in ultra-high induction heating is obtained and discussed.The numerical values are compared with the experimental results.A good agreement between them is observed with 7.9% errors.
文摘缺血性脑卒中的病因分型对临床治疗决策和预后判断有重要价值。近年来,随着高分辨率磁共振血管壁成像(high-resolution vessel wall magnetic resonance imaging,HR-VW-MRI)在脑卒中临床研究和实践中的应用增加,7 T MRI以其更高信噪比和更优图像质量,可发现脑血管早期、细微的病理变化,为深入了解各种脑血管疾病的病理机制提供了新思路。然而,超高场强也存在B1场不均、扫描时间长等技术挑战。本文就7 T HR-VW-MRI在缺血性卒中病因分型及临床应用中的进展进行综述,深入分析7 T HR-VW-MRI在提升临床诊断精确性与指导临床治疗中的潜在价值,为临床实践与科研探索提供参考。
文摘超高场磁共振(ultra-high-field magnetic resonance,UHF-MR)对疾病诊断和细微结构显示一直是临床研究热点。但由于其固有特性,7 T UHF-MR的研究目前主要集中在中枢神经及部分骨肌系统疾病中。而5 T UHF-MR的问世,似乎为骨肌及全身系统的超高场成像带来了新的可能性。本文重点对UHF-MR的固有物理特性对骨肌系统疾病诊断的影响及UHF-MR在骨肌系统疾病中的临床研究进展展开综述,旨在增强医师对UHF-MR的了解,拓宽研究者的思路,进一步推动新型对比剂的开发、多模态成像技术的应用以及人工智能辅助诊断的结合,促进UHF-MR在骨肌系统疾病中的临床转化及应用。
