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. 2021 Jun 7;21:95. doi: 10.1186/s12880-021-00625-0

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© The Author(s) 2021

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.

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Fig. 3 — CTR measurements on normal, mild cardiomegaly and cardiomegaly cases using AI-only (the first and second rows) and manual (the third and fourth rows) methods. The first (a–c) and second (d–f) rows are CTR measurements by AI-only which accepted and rejected by user, respectively. The third row (g–i) is the user adjustment of the rejected AI-only operation (the second row) while the last row (j–l) demonstrates the failed cases from AI-only operation required fully manual operation. CTR value is displayed at the lower right corner of each image