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Magnetic resonance data acquisition triggering method and device and readable storage medium

A data acquisition and magnetic resonance technology, applied in the field of MRI, can solve problems such as the difficulty of deciding when to start MR data acquisition, reduce the probability of missing triggers, premature triggers or too late missed triggers, and improve accuracy

Pending Publication Date: 2021-12-07
SIEMENS SHENZHEN MAGNETIC RESONANCE
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the characteristics and patterns of respiratory motion vary over time and between individuals, making it challenging to predict the evolution of the respiratory signal, making it difficult to decide when to initiate MR data acquisition, a problem that has not been fully resolved until now

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  • Magnetic resonance data acquisition triggering method and device and readable storage medium
  • Magnetic resonance data acquisition triggering method and device and readable storage medium
  • Magnetic resonance data acquisition triggering method and device and readable storage medium

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Embodiment Construction

[0068] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0069] As used in the description of the present invention and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

[0070] The inventor analyzes the existing method for determining the trigger point of MR data acquisition and finds that it has the following defects:

[0071] In the existing method, a peak expiratory amplitude is defined in advance according to several previous breathing cycles, such as figure 1 At the position of the straight line X in , take 80% of the peak exhalation amplitude as the trigger point threshold, such as figure 1 The position of the straight line Y in , after that, in the expiratory phase of ea...

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Abstract

The invention provides a magnetic resonance data acquisition triggering method and device and a readable storage medium. The method comprises the following steps: detecting a breathing direction of a breathing signal of a collected person; predicting an amplitude peak value of an expiration signal in a current breathing period in real time according to a real-time breathing signal of a collected person, multiplying the amplitude peak value by a preset coefficient, and taking an obtained product as a trigger point threshold value of the current breathing period; moreover, when it is determined that the expiration stage of the current breathing period is started according to the breathing direction of the breathing signal, the absolute value of the difference value between the amplitude of the current expiration signal and the trigger point threshold value obtained through current calculation is calculated in real time or periodically, and if the absolute value of the difference value is smaller than a preset difference value threshold value, MR data collection is triggered. According to the invention, the accuracy of MR data acquisition triggering is improved.

Description

technical field [0001] The present invention relates to the technical field of MRI (Magnetic Resonance Imaging, magnetic resonance imaging), in particular to a method, device and readable storage medium for MR (Magnetic Resonance, magnetic resonance) data acquisition and triggering. Background technique [0002] MRI is to apply a radio frequency (Radio Frequency, RF) pulse of a specific frequency to the human body in a static magnetic field, so that the hydrogen protons in the human body are excited to produce MR phenomenon. After the pulse is stopped, the protons will generate MR during the relaxation process. MR signals are processed through the reception, spatial encoding and image reconstruction of MR signals to generate MR images. [0003] Breathing motion of the patient can degrade diagnostic MR image quality in the abdomen, which remains one of the major challenges in diagnostic MR imaging. In order to obtain artifact-free images of the chest or abdomen, a respiratio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/055A61B5/08G01R33/48G01R33/567
CPCA61B5/055A61B5/08G01R33/48G01R33/567A61B5/7267A61B5/7292A61B5/0816
Inventor 何金强董芳翁得河
Owner SIEMENS SHENZHEN MAGNETIC RESONANCE