核磁共振成像仪梯度预加重和数字下变频调节
Gradient Pre - emphasis Adjustment and Digital Down - regulation for Magnetic Resonance Imaging
Abstract
核磁共振成像（MRI，MagneticResonanceImaging）仪器是具有物理、生物、化学等多学科综合性的设备，其设计较为复杂、技术含量较高，体积较大。就国内而言，大部分用于医疗诊断的MRI仪器分布在沿海大城市或者内地较发达城市的大型综合性医院，由于MRI仪器高昂的费用与后期的维护费用许多偏远地区和小型医院还无法普及。近年来医疗器械受到了各界的高度关注，“十三五”规划后国家为医疗器械的创新与发展提供了巨大的支持，尤其是在磁共振领域，因此研发低成本、数字化、小型化的核磁共振成像仪器具有很重要的战略意义。 本文以磁共振成像系统为研究课题，重点对磁共振成像仪的梯度预加重及自适应调节和数字下... Magnetic Resonance Imaging instrument is a physical, biological, chemical and other multi-disciplinary integrated equipment, its design is more complex, high technical content, larger. In the country, most of the MRI instruments used for medical diagnosis are distributed in large-scale general hospitals in coastal cities or in the more developed cities in the Mainland. Due to the high cost of MRI ...