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. 2021 Sep 22;11:689176. doi: 10.3389/fonc.2021.689176

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Copyright © 2021 Cao, Zhang, Bao, Zhang, Yan, Wang, Ren, Chai, Zhao and Zhou

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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An example of dual-energy spectral computed tomography (DESCT) images with regions of interest (ROIs) for evaluating quantitative measurements in a 63-year-old man with ascending colon cancer that was pathologically confirmed to have lymph node metastasis (LNM). ROIs were placed in the arterial phase (A) and the venous phase (D) of the 70-keV monochromatic images. Concurrently, ROIs were copied to the arterial phase (B) and the venous phase (E) of iodine-based material decomposition images and the arterial phase (C) and the venous phase (F) of the effective atomic number images. Local lymphadenopathy is presented in front of the right psoas major (white arrow) at both the arterial phase and venous phase (A–F).