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Magnetic resonance imaging method and system

A technology of magnetic resonance imaging and respiratory motion, applied in medical science, sensors, diagnostic recording/measurement, etc., can solve problems such as poor artifact suppression effect, affect imaging effect, increase system and operational complexity, and avoid sequence Steady-state issues, the effect of reducing motion artifacts

Active Publication Date: 2017-03-29
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology

However, for subjects with an irregular heart, there is often an error in the estimation of the time delay, which leads to poor suppression of artifacts and ultimately affects the imaging effect
In addition, the additional navigation trigger device increases the complexity of the system and operation to a certain extent

Method used

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  • Magnetic resonance imaging method and system
  • Magnetic resonance imaging method and system
  • Magnetic resonance imaging method and system

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Embodiment Construction

[0050] In order to make the above objects, features and advantages of the present invention more obvious and comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0051]Each contraction of the atrium and ventricle is called a cardiac cycle. During the rhythmic activity of the heart, its excited state also changes periodically. The electrocardiogram can be used to display the performance of changes in heart movement at various moments in vitro. The ventricle moves violently and quickly during contraction, while the heart moves slowly and lasts a long time during diastole (the diastolic period accounts for about 5 / 8 of the entire cardiac cycle), and the acquisition of MRI signals at the end of systole (diastole) is the suitable. Cardiac gating (cadiac gating) imaging is a technique that combines shaping sequences with physiological triggers for magnetic resonance scanni...

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Abstract

The invention discloses a magnetic resonance imaging method. The magnetic resonance imaging method comprises the steps of monitoring the respiratory movement of a subject through a respiratory navigation sequence, monitoring the cardiac motion of the subject through an electrocardio navigation sequence, and judging whether the physiological state meets the preset scanning condition or not, wherein the scanning condition is that the respiratory movement enters the expiratory end period and the cardiac motion enters the diastole; if the physiological state meets the scanning condition, motivating an imaging sequence in a to-be-imaged region, and acquiring the magnetic resonance imaging data; if the physiological state does not meet the scanning condition, continuing to monitor the physiological state of the subject till the physiological state meets the scanning condition; and after the imaging data is acquired, carrying out reestablishment to obtain a magnetic resonance image. According to the magnetic resonance imaging method, the physiological state of a human body is monitored through the respiratory navigation sequence and the electrocardio navigation sequence alternately, a magnetic resonance signal is acquired at a common interval of the expiratory end period and the diastole, and respiratory movement and cardiac motion artifacts can be effectively avoided. Besides, the invention further provides a magnetic resonance imaging system.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of magnetic resonance imaging, in particular to a magnetic resonance imaging method and system. [0003] 【Background technique】 [0004] Magnetic Resonance Imaging (MRI) is a type of medical imaging, which mainly uses the phenomenon of magnetic resonance to obtain electromagnetic signals from the human body and reconstruct human body information. Due to the advantages of MRI without ionizing radiation damage to the human body, clear soft tissue structure, and rich image information, it has been applied to the imaging diagnosis of various systems of the whole body, especially the brain, heart and great vessels, and joint bones. The imaging effect is better than other diagnostic methods. . In addition, for cardiovascular diseases, MRI can not only observe the anatomical changes of chambers, great vessels and valves, but also can be used for ventricle analysis for qualitative and semi-quantitative diagnosis. an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/055A61B5/08
Inventor 张树恒张卫国
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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