中国医学装备2025，Vol.22Issue(4)：23-27,5.DOI:10.3969/j.issn.1672-8270.2025.04.005
心音门控装置用于心脏磁共振成像采集的可行性研究
Feasibility of phonocardiographic gating device in data acquisition for cardiac MRI
王柏林 1罗瑞 2孟庆乐 2刘希胜 3王峰2
作者信息
- 1. 南京医科大学医学影像学院 南京 221000
- 2. 南京医科大学附属南京医院核医学科 南京 221000
- 3. 江苏省人民医院放射科 南京 221000
- 折叠
摘要
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.关键词
磁共振成像(MRI)/门控装置/心音/卷积神经网络/循环神经网络Key words
Magnetic resonance imaging(MRI)/Gating device/Heart sound/Convolutional neural network/Recurrent neural network分类
医药卫生引用本文复制引用
王柏林,罗瑞,孟庆乐,刘希胜,王峰..心音门控装置用于心脏磁共振成像采集的可行性研究[J].中国医学装备,2025,22(4):23-27,5.
