基于特制ResNet20的中孕期Ⅱ级产前超声检查胎儿切面识别

doi:10.3969/j.issn.0258-8021.2025.05.003

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Abstract To address the problems of experience-dependency, low efficiency and wrong diagnosis risks in standard section recognition during second-trimester fetal level II prenatal ultrasound screening, this study explored the application of convolutional neural network (CNN) technology for automatic recognition of multi-section ultrasound images, aiming to improve screening accuracy and real-time performance. Ultrasound images of second-trimester fetuses from 200 pregnant women were collected using GE E8 and Samsung WS80A color Doppler devices, covering 10 standard fetal sections (1 869 images in total). All images were normalized to 227 pixels×227 pixels. A specially designed ResNet20 model was constructed, featuring a seven-layer architecture with bottleneck residual modules, and the softmax function was used for classification probability output. During the training, 90% of the images were used as the training set, and 10% of them as the test set. The optimization employed a multi-class cross-entropy loss with a learning rate of 0.1 and a momentum optimizer. The ResNet20 model achieved an overall recognition accuracy of 88.2%, with 100% precisions in identifying the cerebellar transverse section, bilateral eye transverse section, and spinal sagittal section. In comparison, AlexNet and VGG16 showed accuracies of 80.2% and 73.3%, respectively, with statistically significant differences (P<0.001). The average testing time was 33 seconds per case, meeting clinical real-time requirements. The proposed ResNet20 model enabled efficient automatic recognition of second-trimester fetal level II standard sections, demonstrating good performance and clinical application prospects, contributes to the intelligent and standardized improvement of ultrasound screening. The code is open-source at https://github.com/Chenan7/Resnet-19.

Key words： convolutional neural networks second-trimester fetal ultrasound level II prenatal screening standard section recognition

Received: 08 April 2024

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R318

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	Articles by authors
	Xiong Runqing
	Cai Jiaxin
	Zheng Liping
	Ma Duo
	Dai Chenquan

Cite this article:

Xiong Runqing,Cai Jiaxin,Zheng Liping, et al. Level II Ultrasound Standard Plane Recognition for Mid Pregnancy by a Specific ResNet20[J]. Chinese Journal of Biomedical Engineering, 2025, 44(5): 533-540.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2025.05.003 OR http://cjbme.csbme.org/EN/Y2025/V44/I5/533

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