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Full digital spectrometer-based magnetic resonance imaging system

A magnetic resonance imaging, all-digital technology, applied in medical science, sensors, diagnostic recording/measurement, etc., can solve problems such as increasing the difficulty of physicians operating the spectrometer, increasing system instability, and increasing system costs, reducing System cost and maintenance cost, improve transmission quality, and improve the effect of system imaging signal-to-noise ratio

Active Publication Date: 2013-09-11
LIAONING KAMPO MEDICAL SYST
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Problems solved by technology

In this way, it not only increases the difficulty for doctors to operate the spectrometer, but also increases the instability of the system, and the cost of the system also increases accordingly

Method used

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  • Full digital spectrometer-based magnetic resonance imaging system
  • Full digital spectrometer-based magnetic resonance imaging system
  • Full digital spectrometer-based magnetic resonance imaging system

Examples

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Effect test

Embodiment

[0066] Embodiment (1): 1:4 receiving channel magnetic resonance imaging system, such as Figure 8 , 11 .

[0067] Due to the wide application of 4 receiving channel magnetic resonance imaging system, the installed open magnetic resonance system is still dominated by 4 receiving channels. Have a positive meaning. The receiving front-end unit of the fully digital spectrometer with 4 receiving channels is composed of 4 receiving analog front-end channels 1-4, 1 receiving data processing unit, control unit, clock management and photoelectric conversion. Each receiving analog front-end channel corresponds to a receiving coil (not shown in the figure), and the functional block diagram of the receiving analog front-end channel is shown in image 3 As shown, its function is to convert the analog NMR signal coupled from the receiving coil into a direct digital NMR signal, and the 4 direct digital NMR signals are processed by the digital down-conversion, variable bandwidth filter, an...

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Abstract

The invention relates to a full digital spectrometer-based magnetic resonance imaging system. The system adopts modular design, and digital interfaces are employed between modules, which greatly improves signal quality between the modules, but also significantly lowers the system cost and reduces installation and maintenance difficulties. The system at least comprises an operation display unit; a full digital magnetic resonance imaging spectrometer which integrates a special computer, a digital radio frequency excitation and transmission unit, a digital nuclear magnetic resonance (NMR) signal digital receiving unit, and a digital gradient waveform transmission unit; a digital magnet management and patient monitoring unit; a digital gradient amplifier; a digital radio frequency power amplifier; and a receiving front unit. The invention also provides a full digital spectrometer-based magnetic resonance imaging method, which controls each part in the system in a digital mode by using the full digital spectrometer, improves the control accuracy, saves the scanning time, and improves imaging speed.

Description

technical field [0001] The invention relates to a medical device, in particular to a magnetic resonance imaging system based on a fully digital spectrometer. Background technique [0002] The magnetic resonance imaging spectrometer is the core equipment in the magnetic resonance imaging system. Its structure directly determines the complexity and imaging quality of the MRI system. The MR6000 spectrometer (http: / / www.mrsolutions.co.uk / ) of MR SOLUTIONS company in the UK is widely used in China, and it is briefly described below. [0003] 1. Spectrometer receiving system [0004] The spectrometer is placed in the equipment room, and its receiving sampling system is located in the spectrometer. Generally, with the increase of the receiving channel, the number of coaxial cables drawn from the magnet room will also increase accordingly. Since the received NMR signal voltage is free The maximum value of the voltage of the attenuation signal (FID) is given by Equation 1, and it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/055
Inventor 丁志文王君杰施金泉张丙春潘奎卢广
Owner LIAONING KAMPO MEDICAL SYST
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