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A fast automatic recognition and location algorithm for fetal genital organs in ultrasound images

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Abstract

Severe sex ratio imbalance at birth is now becoming an important issue in several Asian countries. Its leading immediate cause is prenatal sex-selective abortion following illegal sex identification by ultrasound scanning. In this paper, a fast automatic recognition and location algorithm for fetal genital organs is proposed as an effective method to help prevent ultrasound technicians from unethically and illegally identifying the sex of the fetus. This automatic recognition algorithm can be divided into two stages. In the ‘rough’ stage, a few pixels in the image, which are likely to represent the genital organs, are automatically chosen as points of interest (POIs) according to certain salient characteristics of fetal genital organs. In the ‘fine’ stage, a specifically supervised learning framework, which fuses an effective feature data preprocessing mechanism into the multiple classifier architecture, is applied to every POI. The basic classifiers in the framework are selected from three widely used classifiers: radial basis function network, backpropagation network, and support vector machine. The classification results of all the POIs are then synthesized to determine whether the fetal genital organ is present in the image, and to locate the genital organ within the positive image. Experiments were designed and carried out based on an image dataset comprising 658 positive images (images with fetal genital organs) and 500 negative images (images without fetal genital organs). The experimental results showed true positive (TP) and true negative (TN) results from 80.5% (265 from 329) and 83.0% (415 from 500) of samples, respectively. The average computation time was 453 ms per image.

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Authors and Affiliations

  1. Post-Doctoral Research Station, Shenzhen University, Shenzhen, 518060, China

    Sheng Tang

  2. Post-Doctoral Work Station, Microprofit Electronic Co. Ltd, Shenzhen, 518057, China

    Sheng Tang

  3. Department of Biomedical Engineering, Shenzhen University, Shenzhen, 518060, China

    Si-ping Chen

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  1. Sheng Tang
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  2. Si-ping Chen
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Correspondence to Si-ping Chen.

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Tang, S., Chen, Sp. A fast automatic recognition and location algorithm for fetal genital organs in ultrasound images. J. Zhejiang Univ. Sci. B 10, 648–658 (2009). https://doi.org/10.1631/jzus.B0930162

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  • DOI: https://doi.org/10.1631/jzus.B0930162

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