A wearable device and a magnetic resonance electrocardiogram gating system based on the wearable device

Abstract

The invention relates to a wearable device and a wearable-device-based magnetic resonance electrocardiogramgate control system.The wearable device comprises a PPG (photoplethysmograph) signal acquisition unit, an R-wave pulse building unit of an electrocardiogram signal and a communication unit; the PPG signal acquisition unit collects a PPG signal of a tester, and sends the PPG signal to the R-wave pulse building unit of the electrocardiogram signal; after the PPG signal is subjected to time delay by the R-wave pulse building unit of the electrocardiogram signal according to the set time delay duration, an R-wave pulse of the electrocardiogram signal is generated; and the communication unit transmits the R-wave pulse of the electrocardiogram signal to a host computer of the corresponding magnetic resonance electrocardiogram gate control system. The R-wave pulse of the ECG (Electrocardiogram) signal is obtained afterthe PPG signal, collected by the wearable device, of thetester is subjected to time delay. The wearable device is simple in structure, low in price and easy to operate, and the tester does not need to maintain the state of attachingelectrodes on chest during the detection process.

Description

technical field [0001] The invention relates to the field of magnetic resonance systems, in particular to a wearable device and a magnetic resonance electrocardiogram gating system based on the wearable device. Background technique [0002] In the scanning process of the scanner of the magnetic resonance system, in order to reconstruct a clear image, the scanner often repeatedly transmits a series of radio frequency pulse sequences within a long scanning time, and then reconstructs an image by superposition, and it needs to be During the scanning process, the imaging object is required to remain still. When imaging the heart, the radio frequency pulse sequences of each scan randomly appear at different moments of the cardiac cycle, and the obtained signals also come from different moments in the cardiac process, which eventually leads to the result of multiple asynchronous signal superposition. Heart images will have severe motion artifacts. A widely used effective method ...

AI Technical Summary

Problems solved by technology

[0004] No matter which method is adopted, accurate acquisition of ECG signals is the primary condition for the realization of ECG gating. In the current magnetic resonance system, the chest electrode acquisition method used for ECG signal acquisition for ECG gating is relatively cumbersome. There are certain restrictions in the operation process, and it is necessary to pay attention to the installation and layout positions of multiple lead wires

And the cost is relatively high, which increases the total cost of the magnetic resonance system

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