Magnetic resonance elasticity imaging pillow style excited by electromagnetism device

Abstract

The invention discloses a magnetic resonance elastography head pillow-type electromagnetic excitation device, which comprises a table frame; a support shaft is fixed on the table frame; the support shaft can be rotationally provided with at least one driving plate, one end of the driving plate positioned on one side of the support shaft is provided with an electromagnetic coil on which a copper wire is used to be connected with an output interface of a low frequency sinusoidal signal amplifier of the magnetic resonance elastography device, and one end of the driving plate positioned on the other side of the support shaft forms a head pillowing part. The excitation device has the advantages that the excitation device sufficiently considers the clinical practicability, has good comfort, so that a patient is easy to accept; during inspection, the head of an inspected person can be substantially contacted with the vibrational excitation device, so the inspected person has no adverse reaction even if receiving the inspection for a longer period, and the device can complete routine MRI inspection and MRE inspection at one time.

Description

technical field [0001] The invention relates to an external vibration excitation device for magnetic resonance elastography, in particular to a head pillow type electromagnetic excitation device for magnetic resonance elastography. Background technique [0002] Magnetic resonance elastography (Magnetic Resonance Elastography, MRE), as a new non-invasive imaging method that can visually display and quantify tissue elasticity, has shown promising research and clinical application prospects. Especially in the examination of brain tissue, it provides a brand-new inspection method that reflects the biomechanical properties of the tissue, and is currently the only non-invasive method that can measure the elasticity of living brain tissue. The working principle of MRE technology is to add a set of mechanical vibration devices to the magnetic resonance imaging equipment, apply an external force on the surface of the object to generate the displacement of the particle in the medium, ...

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Problems solved by technology

[0004] The needle-type vibration excitation device uses the electric needle pierced into the body as the excitation device to generate shear waves locally in the tissue; the disadvantage of this method: invasive examination, and can only be used for small-scale local imaging, so the practical application value is limited

The disadvantages are: ①The contact area between the bite-type excitation device and the subject is small, and the oscillatory wave needs to propagate through the contact surface in the subject, so this method is not conducive to the analysis of the image wavelength in MRE examination; ②During MRE examination, the single-level The inspection takes several minutes, and it will take longer if a multi-level inspection is required. For patients, especially those with poor general conditions, it is difficult to achieve long-term locking vibration excitation devices, so this method is of little value in clinical practice. large; ③When the vibration generated by the bite-type excitation device propagates through the teeth, a small number of subjects will experience bleeding gums, and this method has high requirements for the sanitation and disinfection of the excitation device before each inspection, and at the same time, a small number of subjects cannot accept This kind of stimulation device needs to enter the mouth, so that the examination cannot be performed

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