Grounding technique is very important to ensure the human safety, imaging devices' safety and the devices' reliable running. This paper expatriates the principles of the grounding safety, interference rejection earth, and the grounding modes and the mode selection for each imaging devices and equipments, and related grounding requirements.
Equipment Safety ; methods ; Magnetic Resonance Imaging ; instrumentation

It has been several decades since the Magnetic Resonance Imaging was introduced to the public as a measure of clinical imaging diagnosis in the 1980's. Time has witnessed increasingly advanced structure and imaging technique. Now, fiber is used as the media to transmit signals of MRI. Manufacturers are competing to release new and creative imaging technique to customers, which has made it faster, more accurate and more convenient for MR imaging. This article briefly introduces latest MR devices with fiber transmission and summarizes their hardwares and softwares so as to provide reference to hospitals that will purchase these devices.
Magnetic Resonance Imaging ; instrumentation ; methods ; Software

A mechanical shimming method and device for permanent magnet of MRI system has been developed to meet its stringent homogeneity requirement without time-consuming passive shimming on site, installation and adjustment efficiency has been increased.
Magnetic Resonance Imaging ; instrumentation ; methods ; Magnets

In this article, an introduction is given on the structure of RF subsystem, its main parameters and impact on the performance of MRI and RF techniques and its development. Furthermore, pivotal parameters provided by different suppliers are quoted and compared in functionality aspect.
Magnetic Resonance Imaging ; instrumentation ; methods ; Radio Waves

Based on the current GB standard and IEC standard, some unique security risk points of the superconductive magnet were discussed and pointed, some security eigenvalue of widely used MRI were calculated, method and technology of the quench risk & protection were focused. Currently during the type test of superconductive MRI, the national standards and industry standards have not included items focus on superconductive magnet particularly, so this paper gives some recommended discussing and hopes to improve and enhance the future standard. Because superconductive MRI uses a large number of helium gas which is very short in China and if quenching, helium will evaporate quickly, so the helium recycling are also discussed.
Equipment Safety ; Magnetic Resonance Imaging ; instrumentation ; Magnets

Calculation methods of coil sensitivity in parallel MRI were elaborated, compared and analyzed.
Algorithms ; Magnetic Resonance Imaging ; instrumentation ; methods

This paper introduces and analyses common malfunctions of MRI OPNE MARK II to provide reference for maintenance and preservation of the machine.
Equipment Failure ; Magnetic Resonance Imaging ; instrumentation ; Maintenance

To optimize the configuration of the conventional SE and FSE sequence parameters in low field MRI. With the combination of larger vision, relatively thinner slice thickness, small number of excitation (NEX = 1 or 2), the signal-to-noise ration and the spatial resolution on follow-up images are moderate, the scan time is significantly shorter along with fewer motion artifacts, the check success rate is improved.
Equipment Design ; Magnetic Resonance Imaging ; instrumentation ; methods

Deep brain stimulation (DBS) therapy develops rapidly in clinical application. The structures of deep brain stimulator and magnetic resonance imaging (MRI) equipment are introduced, the interactions are analyzed, and the two compatible problems of radio frequency (RF) heating and imaging artifact are summarized in this paper.
Artifacts ; Deep Brain Stimulation ; instrumentation ; Humans ; Magnetic Resonance Imaging ; instrumentation

In this paper, from the current situation of the domestic use of superconducting MRI, on liquid helium supply and demand crisis in the market, the significance of the transformation without LHe of the superconducting MRI magnet was explained, and according to the enterprise's production process, a number of operating without liquid helium transformation practice and ideas were raised, important value orientation for the domestic manufacture and use of superconducting MRI was provided.
Equipment Design ; Magnetic Resonance Imaging ; instrumentation ; Magnetics ; instrumentation