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Noninvasive 4D time-resolved dynamic magnetic resonance angiography method

A technology for magnetic resonance imaging and vascular imaging, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of reducing image quality, sacrificing signal-to-noise ratio, etc., and achieve the effect of high temporal resolution

Inactive Publication Date: 2019-01-04
安影科技(北京)有限公司
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  • Abstract
  • Description
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Problems solved by technology

However, previous solutions are usually achieved by shortening sampling time and reducing contrast agent injection dose, increasing spatial resolution, etc., but such methods sacrifice signal-to-noise ratio (SNR) and reduce image quality

Method used

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  • Noninvasive 4D time-resolved dynamic magnetic resonance angiography method
  • Noninvasive 4D time-resolved dynamic magnetic resonance angiography method
  • Noninvasive 4D time-resolved dynamic magnetic resonance angiography method

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Embodiment Construction

[0030] specific implementation plan

[0031] Describe in detail according to the drawings, several specific implementations of the magnetic resonance imaging method with illustrations in the present invention all adopt figure 1 with Figure 5 sequence shown. In actual use, the specific implementation method will change the structural details of its pulses according to specific steps, sequences, and organ structures, but the basic concept remains unchanged. The steps in this method are only typical steps, and some steps may be used or used in different orders according to different implementation purposes.

[0032] figure 1 It is a flowchart of non-invasive 4D time-resolved dynamic magnetic resonance angiography. This method can be implemented in the imaging area with a uniform magnetic field in conventional MRI equipment (ie, the area where the general subject is tested).

[0033] exist figure 1 In module 12, arterial blood is magnetically labeled as an endogenous tracer...

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Abstract

The invention discloses a non-invasive 4D time-resolved dynamic magnetic resonance angiography method. Arterial spin labeling was used to label water molecules as endogenous markers, and multiphase equalization was used to preferentially read pulses to form a dataset. Quantitative tracer kinetic model was established by estimating blood volume, blood flow and mean transit time. The acquired data were used to reconstruct images to provide a set of MR images. The invention can display the blood vessel structure from the viewpoint of improving the spatial resolution, furthermore, the establishment of blood flow model can be optimized from the viewpoint of improving time resolution, and the examination and diagnosis of cerebrovascular diseases by magnetic resonance angiography can be improvedfrom two aspects, and the harmful effects caused by injecting contrast medium and ionizing radiation exposure can be reduced or even eliminated by conventional methods.

Description

technical field [0001] The present invention is realized by using Arterial Spin Label of blood as an endogenous tracer and using Multiphase Balanced Steady State Free Precession (Multiphase Balanced Steady State FreePrecession, b-SSFP) reading sequence A method for 4D time-resolved dynamic magnetic resonance angiography. Background technique [0002] Certain clinical indications, such as stenotic-occlusive diseases, arteriovenous malformations, and aneurysms, can be detected and diagnosed by assessing the dynamic flow patterns of blood vessels in vivo. [0003] At present, arterial digital subtraction angiography (DSA) is the reference standard to obtain the presence or absence of lesions in the brain blood circulation and other vascular systems through high time and space resolution images, but this method needs to be imaged under ionizing radiation (X-ray), and Injection of iodine-containing contrast medium is required, and there are risks such as radiation exposure and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00A61B5/055
CPCG06T7/0012A61B5/055G06T2207/10096G06T2207/30101
Inventor 王炯炯闫丽荣
Owner 安影科技(北京)有限公司
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