Pneumatic supercharging excitation device and method oriented to magnetic resonance elasticity imaging

Abstract

The invention discloses a pneumatic supercharging excitation device and method oriented to magnetic resonance elasticity imaging. The pneumatic supercharging excitation device comprises a vibration generator and a bridging mechanism, wherein the vibration generator comprises a T-type push rod, the edge of a round face of the T-type push rod is connected with a vibrating end airtight air bin through a vibrating end supporting film in a sealed mode, a vibrating end sealing film is arranged in the vibrating end airtight air bin, and opposite balance springs are arranged below the round face of the T-type push rod; the bridging mechanism comprises a miniature air cylinder, an air pressure gauge and a bridging head, a bridging end sealing film is arranged in the bridging head, the lower edge of the bridging head is connected with the edge of an upper round face of an I-type push rod through a bridging end supporting film, and tension springs are arranged at the two sides of the I-type push rod. As the pressure intensity of air in a guide pipe is increased, propagation speed of mechanical waves in the guide pipe is higher, and energy loss of the mechanical waves is smaller. Excitation on tissue in the human body is enhanced, and therefore elasticity imaging quality is higher.

Description

technical field [0001] The invention belongs to the technical field of magnetic resonance elastography, and relates to an external excitation technology for magnetic resonance elastography, in particular to a pneumatic booster excitation device and method for magnetic resonance elastography. Background technique [0002] Elasticity is a mechanical property of human tissue and an important physical property. The elastic modulus of normal tissue is not the same, and the elasticity of normal tissue and pathological tissue is even more different. The size and change of tissue elasticity directly reflect its composition and structure, and are closely related to its biological characteristics and physiological pathology. [0003] Traditional imaging methods, such as ultrasound, CT, and traditional magnetic resonance imaging, cannot provide biomechanical properties of tissues, while magnetic resonance elastography, as a new non-invasive imaging method, can visually display and qua...

AI Technical Summary

Problems solved by technology

In addition, the excitation frequency of the hydraulic vibration generator is lower than 40Hz, which cannot meet the frequency requirements of magnetic resonance elastography

[0008] Application publication number CN 104000591 A discloses an active adsorption bridge excitation device for magnetic resonance elastography, aiming to solve the existing problem of low elastic wave conversion efficiency in magnetic resonance elastography

Images