Feasibility of phonocardiographic gating device in data acquisition for cardiac MRI
10.3969/j.issn.1672-8270.2025.04.005
- VernacularTitle:心音门控装置用于心脏磁共振成像采集的可行性研究
- Author:
Bolin WANG
1
;
Rui LUO
;
Qingle MENG
;
Xisheng LIU
;
Feng WANG
Author Information
1. 南京医科大学医学影像学院 南京 221000
- Publication Type:Journal Article
- Keywords:
Magnetic resonance imaging(MRI);
Gating device;
Heart sound;
Convolutional neural network;
Recurrent neural network
- From:
China Medical Equipment
2025;22(4):23-27
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To design a phonocardiographic gating device that was used in cardiac magnetic resonance imaging(MRI),so as to explore feasibility of synchronized acquisition for cardiac MRI.Methods:A phonocardiographic gating device was designed,which structure included a head of stethoscope,transmission pipeline,microphone and amplification filtering circuit,computer,and pseudo-electrocardiogram(ECG)trigger output circuit.The computer's runs included phonocardiographic recognition neural network of one-dimensional dilated convolutional layer and gating recurrent unit(GRU)layer,which parameters were determined by pre-train.The feasibility of using the phonocardiographic gating device in acquisition of cardiac MRI was explored by comparing the preparation time of examination and image quality for phonocardiographic gating device and ECG gating technique.Results:The average preparation time for the phonocardiographic gating device was(10.46±1.75)seconds,which was significantly shorter than that for ECG gating technique[(32.07±5.26)seconds](t=-11.02,P＜0.05).There were no statistically significant difference in the clarity of short-axis images of heart at end-systole and end-diastole,and the indicators of cardiac function between the two methods(P＞0.05).Conclusion:The phonocardiographic gating device can replace ECG gating for MRI examinations,which can effectively conduct triggering for phonocardiographic gating while reducing preparation time.It holds clinical application value,especially in equipment with high field strength.
