Respiration /ECG gated apparatus for magnetic resonance image-forming system

Abstract

The invention discloses a respiratory and ECG gating device used in a MRI system, relating to the MRI technology, wherein an information processing system is an embedded system taking a singlechip as the processing core; a sensor is used to capture respiratory and electrocardio signals which are amplified and subject to analog-to-digital conversion and input into the singlechip to be processed, and used as well to input the respiratory and electrocadio signals into a computer through a serial port for displaying the essential information on the screen of the computer which returns the information of the threshold preset in a man-computer interaction way to the device through the serial pore; the singlechip operates the threshold signal, i.e., control pulses, according to the generation sequence of the threshold and transmit the threshold signal to an alpha spectrometer. The device of the invention is simple, flexible, reliable and low in cost, and ensures the real timing and accuracy of the captured signals and clear image of the MRI system.

Description

technical field [0001] The invention relates to a special respiration / cardiac gating device for a magnetic resonance imaging system, that is, a device for improving image quality by collecting the rhythm of human respiration and heartbeat to control the sequence running time in the imaging system. Background technique [0002] At present, in the magnetic resonance imaging system, motion artifacts are generated when the system is imaged due to human breathing, heartbeat, etc., so that the resolution and signal-to-noise ratio of the image are reduced. In order to improve the quality of magnetic resonance images, a device that can control the running time of the imaging sequence in the magnetic resonance imaging system to make it the same as the rhythm of human breathing and heartbeat to eliminate motion artifacts is needed. Respiration / ECG gating is one such device. [0003] In the past, there are two types of respiratory / ECG gating devices that are common in the market: elec...

AI Technical Summary

Problems solved by technology

It uses multiple electrodes placed on different parts of the human body to collect multiple signals at the same time, and obtains the respiratory and ECG signal diagrams after processing. It has the characteristics of accurate measurement and better signal presentation, but it is expensive and bulky. The circuit structure is complex, not suitable for supporting the use of magnetic resonance imaging systems, and there are shortcomings such as cumbersome signal acquisition processes

Thermal sensor type respiratory gating, its structure is basically the same as that of the electrocardiogram, and also complex in structure, it puts the thermal sensor on the human respiratory part, collects the human respiratory signal to generate the gating signal to control the imaging sequence, but the operation It is difficult for personnel to set thresholds according to the conditions of different patients to control the occurrence time of pulses, and cross-infection is easy to occur, and there is also the disadvantage of high cost

Images