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[系统概述]
The clinical application of magnetic resonance imaging is a revolution in medical imaging. It is another new tomographic imaging method after CT, B-ultrasound and other imaging methods. Compared with CT, MRI has high tissue resolution and space. It has the advantages of resolution, no hard artifacts, no radiation damage, etc. At the same time, it can measure the blood flow changes of blood vessels and the heart under the conditions of different contrast media, which is widely used in clinical practice.
The current technical requirements for magnetic resonance imaging systems have the following three distinct characteristics:
(1) Intelligent operation (Intelligence)
(2) Scanning speed (Increase Speed)
(3) Innovation Application
(1) Intelligent operation (Intelligence)
(2) Scanning speed (Increase Speed)
(3) Innovation Application
[系统原理]
As a physical phenomenon, nuclear magnetic resonance has been used in the fields of physics, chemistry, and biology and nuclear medicine for more than 30 years. Lauterbur et al. first reported the technique of Magnetic Resonance Imaging in 1973. In the 1980s, MRI, as a department of medical imaging, developed rapidly and has been promoted worldwide. Our country has also carried out this aspect of work. Magnetic resonance imaging (MRI) has hydrogen-containing molecules (such as water molecules and fat) everywhere in body tissues; the NMR frequency of hydrogen nuclei in an external magnetic field is related to the surrounding environment. The information related to the tissue structure of each part can be obtained by the MRI frequency sweep, and then can be combined into a stereoscopic image by computer analysis.
According to the functional requirements of the computer image reconstruction system in the MRI system, it is equipped with a large-capacity and speed computer. Support high resolution, high speed, real-time display. FSC-1717VN adopts Intel 875P+ICH5 system chipset design, excellent performance, extraordinary speed, supports up to 800MHz system bus, Socket478 Intel Pentium 4 and next-generation PRESCOTT processors, supports HT technology, and is equipped with two DDR266/333/400 dual channels DIMM slot can support up to 2GB system memory, INTEL’s unique PAT technology support. A 10M/100Mbps Ethernet controller is integrated on the board; ATI Radeon 9200 8X high-performance AGP graphics acceleration controller, lower temperature, better performance, maximum 64MB DDR display cache. Due to its powerful graphics processing capabilities, FSC-1717VN can provide smoother animation processing for complex 3D game scenes, high-resolution film and television pictures and professional 2D/3D graphics design, rich and realistic light and shadow effects, and lifelike paintings. quality. FSC-1717N can meet the needs of applications with higher performance and stability requirements. It has superior performance, stability and reliability under the test conditions of ambient temperature of -40-65°C. These properties ensure the technological leadership of customer products and meet the development needs of magnetic resonance imaging systems in recent years.
FSC-1717VN can fully meet the needs of users with higher performance and stability requirements. It fully meets the high-speed, high-resolution, and multi-functional requirements of modern magnetic resonance imaging, and provides a broad space for clinical and scientific research.
[系统框图]
The magnetic resonance imaging system is composed of a magnet system, a general instrument system, a computer system and an image display system. The magnet system is composed of a main magnet, a gradient coil, a shimming coil and a radio frequency coil orthogonal to the main magnetic field. The main part of the signal. The general instrument system is a device that generates magnetic resonance phenomena and uses magnetic resonance signals. It is mainly composed of gradient field generation and control system, MR signal receiving and control and other parts. The computer image reconstruction system requires a large-capacity, high-speed computer and a high-resolution analog-to-digital converter (analog/difital converter, A/D) to complete data acquisition, accumulation, Fourier conversion, data processing and image display.
[系统配置]
Man-machine interface: PPC-1501 workstation
Control host: IPC-6806 chassis + FSC-1717VN motherboard
Chassis IPC-6806P/ IPC-6808P
Motherboard FSC-171&VN
Control host: IPC-6806 chassis + FSC-1717VN motherboard
Chassis IPC-6806P/ IPC-6808P
Motherboard FSC-171&VN
CPU P4 2.4G
Memory 512M DDR
Hard disk 160G
Memory 512M DDR
Hard disk 160G
[系统评价]
(1) High reliability.
(2) Excellent image processing performance.
(3) Strong computing ability.
(4) Perfect service system.
(2) Excellent image processing performance.
(3) Strong computing ability.
(4) Perfect service system.
(5) EVOC’s professional “every time, everywhere” service system can provide customers with no worries when choosing “EVOC” products.
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