Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Oct 8;20:113. doi: 10.1186/s12880-020-00511-1

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

PMC Copyright notice

Fig. 2 — Illustration of the network design of the U-Net segmentation network. The network accepts a greyscale frame (128 × 128 pixels) and produces segmentation maps of equal size for the heart chambers involved. The network consists of a contracting path with multiple 3 × 3 convolutions followed by ReLU (Rectified Linear Unit) activation and a max. Pooling operation (2 × 2). The number of channels is doubled at each step of the contraction path. In the expanding part, the feature maps are upscaled symmetrically, with 2 × 2 up-convolutions. In addition, channels of the expanding path are combined with the corresponding part of the contracting path through concatenation. The number on top corresponds to the number of channels, while the dimensions are given on the left of the respective boxes. For details see Ref. [13]