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arXiv 1806.07486cs.CV
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基于迭代变换网络的三维胎儿超声标准面检测

Standard Plane Detection in 3D Fetal Ultrasound Using an Iterative Transformation Network

Imperial College London(帝国理工学院);King’s College London(伦敦国王学院)

Yuanwei Li, Bishesh Khanal, Benjamin Hou, Amir Alansary, Juan J. Cerrolaza, Matthew Sinclair, Jacqueline Matthew, Chandni Gupta, Caroline Knight, Bernhard Kainz, Daniel Rueckert

摘要:

胎儿脑超声(US)中的标准扫描平面检测是评估胎儿发育的关键步骤。在临床环境中,这是通过手动操纵2D探头到所需的扫描平面来完成的。随着3D US的出现,可以容易地获取包含这些标准平面的整个胎儿脑体积。然而,3D体积中的手动标准平面识别是劳动密集型的,并且需要胎儿解剖学的专业知识。我们提出了一个新的迭代变换网络(ITN)的标准平面在3D体积的自动检测。ITN使用卷积神经网络来学习2D平面图像与将该平面朝向3D体积中的标准平面的位置/方向移动所需的变换参数之间的关系。在推理过程中,当前平面图像迭代地传递到网络,直到它收敛到标准平面位置。我们探讨了使用不同的转换表示作为ITN的回归输出的效果。在多任务学习框架下,我们向网络引入额外的分类概率输出,作为回归变换参数的置信度度量,以进一步提高定位精度。在72个胎儿脑组织上,经脑室平面和经小脑平面的误差分别为3.83mm/12.7 °和3.80mm/12.6 °,每个平面耗时0.46s。源代码可在https://github.com/yuanwei1989/plane-detection上公开获取。

英文摘要:

Standard scan plane detection in fetal brain ultrasound (US) forms a crucial step in the assessment of fetal development. In clinical settings, this is done by manually manoeuvring a 2D probe to the desired scan plane. With the advent of 3D US, the entire fetal brain volume containing these standard planes can be easily acquired. However, manual standard plane identification in 3D volume is labour-intensive and requires expert knowledge of fetal anatomy. We propose a new Iterative Transformation Network (ITN) for the automatic detection of standard planes in 3D volumes. ITN uses a convolutional neural network to learn the relationship between a 2D plane image and the transformation parameters required to move that plane towards the location/orientation of the standard plane in the 3D volume. During inference, the current plane image is passed iteratively to the network until it converges to the standard plane location. We explore the effect of using different transformation representations as regression outputs of ITN. Under a multi-task learning framework, we introduce additional classification probability outputs to the network to act as confidence measures for the regressed transformation parameters in order to further improve the localisation accuracy. When evaluated on 72 US volumes of fetal brain, our method achieves an error of 3.83mm/12.7 degrees and 3.80mm/12.6 degrees for the transventricular and transcerebellar planes respectively and takes 0.46s per plane. Source code is publicly available at https://github.com/yuanwei1989/plane-detection.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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