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. 2022 Sep 7;33(1):162–171. doi: 10.1007/s00330-022-09033-6

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Open Access This 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/.

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Fig. 5 — Receiver operating characteristic curve (ROC) analysis. ROC curve and performance of dual-energy CT quantitative parameters (A), and characteristics and combination of parameters (B) in diagnosing metastatic cervical lymph nodes. ROC curve and performance of parameters in diagnosing metastatic cervical lymph nodes at level IIA (C) and level IIB (D). ED, electron density; Z_eff, effective atomic number; IC, iodine concentration; λ_HU, slope of the spectral Hounsfield unit curve; DEI, dual-energy index; AUC, area under precision-recall curve; CI, confidence interval