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Spectral CT Imaging of Laryngeal and Hypopharyngeal Squamous Cell Carcinoma: Evaluation of Image Quality and Status of Lymph Nodes
PURPOSE: The purpose of this study was to evaluate image quality and status of lymph nodes in laryngeal and hypopharyngeal squamous cell carcinoma (SCC) patients using spectral CT imaging. MATERIALS AND METHODS: Thirty-eight patients with laryngeal and hypopharyngeal SCCs were scanned with spectral...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3875441/ https://www.ncbi.nlm.nih.gov/pubmed/24386214 http://dx.doi.org/10.1371/journal.pone.0083492 |
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author | Li, Aiyin Liang, Hui Li, Wei Wang, Zhongzhou Pang, Tao Li, Jun Shi, Hao Zhang, Chengqi |
author_facet | Li, Aiyin Liang, Hui Li, Wei Wang, Zhongzhou Pang, Tao Li, Jun Shi, Hao Zhang, Chengqi |
author_sort | Li, Aiyin |
collection | PubMed |
description | PURPOSE: The purpose of this study was to evaluate image quality and status of lymph nodes in laryngeal and hypopharyngeal squamous cell carcinoma (SCC) patients using spectral CT imaging. MATERIALS AND METHODS: Thirty-eight patients with laryngeal and hypopharyngeal SCCs were scanned with spectral CT mode in venous phase. The conventional 140-kVp polychromatic images and one hundred and one sets of monochromatic images were generated ranging from 40 keV to 140 keV. The mean optimal keV was calculated on the monochromatic images. The image quality of the mean optimal keV monochromatic images and polychromatic images was compared with two different methods including a quantitative analysis method and a qualitative analysis method. The HU curve slope (λ(HU)) in the target lymph nodes and the primary lesion was calculated respectively. The ratio of λ(HU) was studied between metastatic and non-metastatic lymph nodes group. RESULTS: A total of 38 primary lesions were included. The mean optimal keV was obtained at 55±1.77 keV on the monochromatic images. The image quality evaluated by two different methods including a quantitative analysis method and a qualitative analysis method was obviously increased on monochromatic images than polychromatic images (p<0.05). The ratio of λ(HU) between metastatic and non-metastatic lymph nodes was significantly different in the venous phase images (p<0.05). CONCLUSION: The monochromatic images obtained with spectral CT can be used to improve the image quality of laryngeal and hypopharyngeal SCC and the N-staging accuracy. The quantitative ratio of λ(HU) may be helpful for differentiating between metastatic and non-metastatic cervical lymph nodes. |
format | Online Article Text |
id | pubmed-3875441 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-38754412014-01-02 Spectral CT Imaging of Laryngeal and Hypopharyngeal Squamous Cell Carcinoma: Evaluation of Image Quality and Status of Lymph Nodes Li, Aiyin Liang, Hui Li, Wei Wang, Zhongzhou Pang, Tao Li, Jun Shi, Hao Zhang, Chengqi PLoS One Research Article PURPOSE: The purpose of this study was to evaluate image quality and status of lymph nodes in laryngeal and hypopharyngeal squamous cell carcinoma (SCC) patients using spectral CT imaging. MATERIALS AND METHODS: Thirty-eight patients with laryngeal and hypopharyngeal SCCs were scanned with spectral CT mode in venous phase. The conventional 140-kVp polychromatic images and one hundred and one sets of monochromatic images were generated ranging from 40 keV to 140 keV. The mean optimal keV was calculated on the monochromatic images. The image quality of the mean optimal keV monochromatic images and polychromatic images was compared with two different methods including a quantitative analysis method and a qualitative analysis method. The HU curve slope (λ(HU)) in the target lymph nodes and the primary lesion was calculated respectively. The ratio of λ(HU) was studied between metastatic and non-metastatic lymph nodes group. RESULTS: A total of 38 primary lesions were included. The mean optimal keV was obtained at 55±1.77 keV on the monochromatic images. The image quality evaluated by two different methods including a quantitative analysis method and a qualitative analysis method was obviously increased on monochromatic images than polychromatic images (p<0.05). The ratio of λ(HU) between metastatic and non-metastatic lymph nodes was significantly different in the venous phase images (p<0.05). CONCLUSION: The monochromatic images obtained with spectral CT can be used to improve the image quality of laryngeal and hypopharyngeal SCC and the N-staging accuracy. The quantitative ratio of λ(HU) may be helpful for differentiating between metastatic and non-metastatic cervical lymph nodes. Public Library of Science 2013-12-30 /pmc/articles/PMC3875441/ /pubmed/24386214 http://dx.doi.org/10.1371/journal.pone.0083492 Text en © 2013 Li et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Li, Aiyin Liang, Hui Li, Wei Wang, Zhongzhou Pang, Tao Li, Jun Shi, Hao Zhang, Chengqi Spectral CT Imaging of Laryngeal and Hypopharyngeal Squamous Cell Carcinoma: Evaluation of Image Quality and Status of Lymph Nodes |
title | Spectral CT Imaging of Laryngeal and Hypopharyngeal Squamous Cell Carcinoma: Evaluation of Image Quality and Status of Lymph Nodes |
title_full | Spectral CT Imaging of Laryngeal and Hypopharyngeal Squamous Cell Carcinoma: Evaluation of Image Quality and Status of Lymph Nodes |
title_fullStr | Spectral CT Imaging of Laryngeal and Hypopharyngeal Squamous Cell Carcinoma: Evaluation of Image Quality and Status of Lymph Nodes |
title_full_unstemmed | Spectral CT Imaging of Laryngeal and Hypopharyngeal Squamous Cell Carcinoma: Evaluation of Image Quality and Status of Lymph Nodes |
title_short | Spectral CT Imaging of Laryngeal and Hypopharyngeal Squamous Cell Carcinoma: Evaluation of Image Quality and Status of Lymph Nodes |
title_sort | spectral ct imaging of laryngeal and hypopharyngeal squamous cell carcinoma: evaluation of image quality and status of lymph nodes |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3875441/ https://www.ncbi.nlm.nih.gov/pubmed/24386214 http://dx.doi.org/10.1371/journal.pone.0083492 |
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