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April 21, 2026SHILAP Revista de lepidopterología0 citationsOpen Access

AI-assisted fetal heart monitoring: a CTG classification model combining attention mechanism and convolutional neural networks

XWXinhao WangQYQingshan YouTQTianxin Qiu

Key Result

The proposed hybrid attention-based deep learning model achieved a classification accuracy of 97.94% in detecting fetal hypoxia from cardiotocography images.

Key Points

  • The aim is to create a deep-learning model for monitoring fetal heart rate and detecting hypoxia without complex feature extraction.
  • Developed a hybrid attention mechanism for real-time fetal monitoring images.
  • Utilized deep learning to classify fetal health states from cardiotocography images.
  • Achieved a classification accuracy of 97.94% on a real-world clinical dataset.
  • Demonstrated high efficiency in detecting fetal hypoxia.

Structured PICO

Does a deep-learning-based computer vision approach combining attention mechanisms and CNNs accurately classify fetal health states from CTG images?

P
Population
489 singleton pregnancies who underwent routine fetal heart rate monitoring at the obstetrics outpatient clinic of the First People's Hospital of Longquanyi District, Chengdu, Sichuan Province, China (224 normal cases, 265 pathological cases).
I
Intervention
Deep-learning-based computer vision approach combining a hybrid attention mechanism and ResNet-18 for direct processing of raw CTG images (fetal heart rate and uterine contraction signals).
O
Outcome
Classification accuracy of fetal health states (detecting fetal hypoxia/abnormalities)

A hybrid attention-based deep learning approach directly processing raw CTG images achieved 97.94% accuracy in classifying fetal health states, offering a potential tool for early detection of fetal hypoxia.

Main Result

Absolute Event Rate: 97.94% vs 93.88%

Limitations

  • Relatively limited sample size of 489 cases
  • Complex real-world clinical artifacts such as uneven illumination, handwritten annotations, and severe image distortions may still affect preprocessing robustness
  • Complex real-world clinical artifacts such as uneven illumination, handwritten annotations, and severe image distortions may still affect preprocessing robustness.

Abstract

Objective To develop a deep-learning-based computer vision approach for fetal heart rate (FHR) monitoring that can efficiently detect fetal hypoxia without relying on complex feature extraction methods. Methods A hybrid attention mechanism was proposed for direct processing of fetal monitoring images (cardiotocography, CTG), eliminating the need for manual feature extraction. The method leverages deep learning to classify fetal health states based on real-time CTG images. Results Experiments on a real-world clinical dataset demonstrated that the proposed method achieved a classification accuracy of 97.94%, indicating its high efficiency in detecting fetal hypoxia. Conclusion The proposed hybrid attention-based deep learning approach provides reliable support for the early detection of fetal hypoxia, overcoming the limitations of traditional machine learning methods that rely on complex feature extraction.

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Cite This Study

Wang et al. (2026) studied Fetal hypoxia (n=489). Hybrid attention-based deep learning model (ResNet18-HA) vs. Baseline ResNet-18 model without hybrid attention was evaluated on Classification accuracy for fetal health states. The proposed hybrid attention-based deep learning model achieved a classification accuracy of 97.94% in detecting fetal hypoxia from cardiotocography images.

synapsesocial.com/papers/69e7132bcb99343efc98ce6ehttps://doi.org/10.3389/fmed.2026.1804810
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