Detecting a Fetus in Ultrasound Images using Grad CAM and Locating the Fetus in the Uterus

Genta Ishikawa, Rong Xu, Jun Ohya, Hiroyasu Iwata

2019

Abstract

In this paper, we propose an automatic method for estimating fetal position based on classification and detection of different fetal parts in ultrasound images. Fine tuning is performed in the ultrasound images to be used for fetal examination using CNN, and classification of four classes "head", "body", "leg" and "other" is realized. Based on the obtained learning result, binarization that thresholds the gradient of the feature obtained by Grad Cam is performed in the image so that a bounding box of the region of interest with large gradient is extracted. The center of the bounding box is obtained from each frame so that the trajectory of the centroids is obtained; the position of the fetus is obtained as the trajectory. Experiments using 2000 images were conducted using a fetal phantom. Each recall ratiso of the four class is 99.6% for head, 99.4% for body, 99.8% for legs, 72.6% for others, respectively. The trajectories obtained from the fetus present in “left”, “center”, “right” in the images show the above-mentioned geometrical relationship. These results indicate that the estimated fetal position coincides with the actual position very well, which can be used as the first step for automatic fetal examination by robotic systems.

Paper Citation

in Harvard Style

Ishikawa G., Xu R., Ohya J. and Iwata H. (2019). Detecting a Fetus in Ultrasound Images using Grad CAM and Locating the Fetus in the Uterus.In Proceedings of the 8th International Conference on Pattern Recognition Applications and Methods - Volume 1: ICPRAM, ISBN 978-989-758-351-3, pages 181-189. DOI: 10.5220/0007385001810189

in Bibtex Style

@conference{icpram19,
author={Genta Ishikawa and Rong Xu and Jun Ohya and Hiroyasu Iwata},
title={Detecting a Fetus in Ultrasound Images using Grad CAM and Locating the Fetus in the Uterus},
booktitle={Proceedings of the 8th International Conference on Pattern Recognition Applications and Methods - Volume 1: ICPRAM,},
year={2019},
pages={181-189},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007385001810189},
isbn={978-989-758-351-3},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 8th International Conference on Pattern Recognition Applications and Methods - Volume 1: ICPRAM,
TI - Detecting a Fetus in Ultrasound Images using Grad CAM and Locating the Fetus in the Uterus
SN - 978-989-758-351-3
AU - Ishikawa G.
AU - Xu R.
AU - Ohya J.
AU - Iwata H.
PY - 2019
SP - 181
EP - 189
DO - 10.5220/0007385001810189