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Quantitative parameters in novel spectral computed tomography: Assessment of Ki-67 expression in patients with gastric adenocarcinoma

BACKGROUND: The level of Ki-67 expression has served as a prognostic factor in gastric cancer. The quantitative parameters based on the novel dual-layer spectral detector computed tomography (DLSDCT) in discriminating the Ki-67 expression status are unclear. AIM: To investigate the diagnostic abilit...

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Autores principales: Mao, Li-Ting, Chen, Wei-Cui, Lu, Jian-Ye, Zhang, Han-Liang, Ye, Yong-Song, Zhang, Yu, Liu, Bo, Deng, Wei-Wei, Liu, Xian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Baishideng Publishing Group Inc 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10037253/
https://www.ncbi.nlm.nih.gov/pubmed/36970586
http://dx.doi.org/10.3748/wjg.v29.i10.1602
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author Mao, Li-Ting
Chen, Wei-Cui
Lu, Jian-Ye
Zhang, Han-Liang
Ye, Yong-Song
Zhang, Yu
Liu, Bo
Deng, Wei-Wei
Liu, Xian
author_facet Mao, Li-Ting
Chen, Wei-Cui
Lu, Jian-Ye
Zhang, Han-Liang
Ye, Yong-Song
Zhang, Yu
Liu, Bo
Deng, Wei-Wei
Liu, Xian
author_sort Mao, Li-Ting
collection PubMed
description BACKGROUND: The level of Ki-67 expression has served as a prognostic factor in gastric cancer. The quantitative parameters based on the novel dual-layer spectral detector computed tomography (DLSDCT) in discriminating the Ki-67 expression status are unclear. AIM: To investigate the diagnostic ability of DLSDCT-derived parameters for Ki-67 expression status in gastric carcinoma (GC). METHODS: Dual-phase enhanced abdominal DLSDCT was performed preoperatively in 108 patients with gastric adenocarcinoma. Primary tumor monoenergetic CT attenuation value at 40-100 kilo electron volt (kev), the slope of the spectral curve (λ(HU)), iodine concentration (IC), normalized IC (nIC), effective atomic number (Z(eff)) and normalized Z(eff) (nZ(eff)) in the arterial phase (AP) and venous phase (VP) were retrospectively compared between patients with low and high Ki-67 expression in gastric adenocarcinoma. Spearman’s correlation coefficient was used to analyze the association between the above parameters and Ki-67 expression status. Receiver operating characteristic (ROC) curve analysis was performed to compare the diagnostic efficacy of the statistically significant parameters between two groups. RESULTS: Thirty-seven and 71 patients were classified as having low and high Ki-67 expression, respectively. CT(40 kev-VP), CT(70 kev-VP), CT(100 kev-VP), and Z(eff)-related parameters were significantly higher, but IC-related parameters were lower in the group with low Ki-67 expression status than the group with high Ki-67 expression status, and other analyzed parameters showed no statistical difference between the two groups. Spearman’s correlation analysis showed that CT(40 kev-VP), CT(70 kev-VP), CT(100 kev-VP), Z(eff), and nZ(eff) exhibited a negative correlation with Ki-67 status, whereas IC and nIC had positive correlation with Ki-67 status. The ROC analysis demonstrated that the multi-variable model of spectral parameters performed well in identifying the Ki-67 status [area under the curve (AUC) = 0.967; sensitivity 95.77%; specificity 91.89%)]. Nevertheless, the differentiating capabilities of single-variable model were moderate (AUC value 0.630 - 0.835). In addition, the nZ(eff)(VP) and nIC(VP) (AUC 0.835 and 0.805) showed better performance than CT(40 kev-VP), CT(70 kev-VP) and CT(100 kev-VP) (AUC 0.630, 0.631 and 0.662) in discriminating the Ki-67 status. CONCLUSION: Quantitative spectral parameters are feasible to distinguish low and high Ki-67 expression in gastric adenocarcinoma. Z(eff) and IC may be useful parameters for evaluating the Ki-67 expression.
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spelling pubmed-100372532023-03-25 Quantitative parameters in novel spectral computed tomography: Assessment of Ki-67 expression in patients with gastric adenocarcinoma Mao, Li-Ting Chen, Wei-Cui Lu, Jian-Ye Zhang, Han-Liang Ye, Yong-Song Zhang, Yu Liu, Bo Deng, Wei-Wei Liu, Xian World J Gastroenterol Retrospective Study BACKGROUND: The level of Ki-67 expression has served as a prognostic factor in gastric cancer. The quantitative parameters based on the novel dual-layer spectral detector computed tomography (DLSDCT) in discriminating the Ki-67 expression status are unclear. AIM: To investigate the diagnostic ability of DLSDCT-derived parameters for Ki-67 expression status in gastric carcinoma (GC). METHODS: Dual-phase enhanced abdominal DLSDCT was performed preoperatively in 108 patients with gastric adenocarcinoma. Primary tumor monoenergetic CT attenuation value at 40-100 kilo electron volt (kev), the slope of the spectral curve (λ(HU)), iodine concentration (IC), normalized IC (nIC), effective atomic number (Z(eff)) and normalized Z(eff) (nZ(eff)) in the arterial phase (AP) and venous phase (VP) were retrospectively compared between patients with low and high Ki-67 expression in gastric adenocarcinoma. Spearman’s correlation coefficient was used to analyze the association between the above parameters and Ki-67 expression status. Receiver operating characteristic (ROC) curve analysis was performed to compare the diagnostic efficacy of the statistically significant parameters between two groups. RESULTS: Thirty-seven and 71 patients were classified as having low and high Ki-67 expression, respectively. CT(40 kev-VP), CT(70 kev-VP), CT(100 kev-VP), and Z(eff)-related parameters were significantly higher, but IC-related parameters were lower in the group with low Ki-67 expression status than the group with high Ki-67 expression status, and other analyzed parameters showed no statistical difference between the two groups. Spearman’s correlation analysis showed that CT(40 kev-VP), CT(70 kev-VP), CT(100 kev-VP), Z(eff), and nZ(eff) exhibited a negative correlation with Ki-67 status, whereas IC and nIC had positive correlation with Ki-67 status. The ROC analysis demonstrated that the multi-variable model of spectral parameters performed well in identifying the Ki-67 status [area under the curve (AUC) = 0.967; sensitivity 95.77%; specificity 91.89%)]. Nevertheless, the differentiating capabilities of single-variable model were moderate (AUC value 0.630 - 0.835). In addition, the nZ(eff)(VP) and nIC(VP) (AUC 0.835 and 0.805) showed better performance than CT(40 kev-VP), CT(70 kev-VP) and CT(100 kev-VP) (AUC 0.630, 0.631 and 0.662) in discriminating the Ki-67 status. CONCLUSION: Quantitative spectral parameters are feasible to distinguish low and high Ki-67 expression in gastric adenocarcinoma. Z(eff) and IC may be useful parameters for evaluating the Ki-67 expression. Baishideng Publishing Group Inc 2023-03-14 2023-03-14 /pmc/articles/PMC10037253/ /pubmed/36970586 http://dx.doi.org/10.3748/wjg.v29.i10.1602 Text en ©The Author(s) 2023. Published by Baishideng Publishing Group Inc. All rights reserved. https://creativecommons.org/licenses/by-nc/4.0/This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.
spellingShingle Retrospective Study
Mao, Li-Ting
Chen, Wei-Cui
Lu, Jian-Ye
Zhang, Han-Liang
Ye, Yong-Song
Zhang, Yu
Liu, Bo
Deng, Wei-Wei
Liu, Xian
Quantitative parameters in novel spectral computed tomography: Assessment of Ki-67 expression in patients with gastric adenocarcinoma
title Quantitative parameters in novel spectral computed tomography: Assessment of Ki-67 expression in patients with gastric adenocarcinoma
title_full Quantitative parameters in novel spectral computed tomography: Assessment of Ki-67 expression in patients with gastric adenocarcinoma
title_fullStr Quantitative parameters in novel spectral computed tomography: Assessment of Ki-67 expression in patients with gastric adenocarcinoma
title_full_unstemmed Quantitative parameters in novel spectral computed tomography: Assessment of Ki-67 expression in patients with gastric adenocarcinoma
title_short Quantitative parameters in novel spectral computed tomography: Assessment of Ki-67 expression in patients with gastric adenocarcinoma
title_sort quantitative parameters in novel spectral computed tomography: assessment of ki-67 expression in patients with gastric adenocarcinoma
topic Retrospective Study
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10037253/
https://www.ncbi.nlm.nih.gov/pubmed/36970586
http://dx.doi.org/10.3748/wjg.v29.i10.1602
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