Performance of quantitative CT parameters in assessment of disease severity in COPD: A prospective study
Background: Both emphysematous destruction of lung parenchyma and airway remodeling is thought to contribute to airflow limitation in cases of chronic obstructive pulmonary disease (COPD). Objective: To evaluate the value of quantitative computed tomography (QCT) parameters of emphysema and airway d...
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| Format: | Article |
| Language: | English |
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Thieme Medical and Scientific Publishers Pvt. Ltd.
2018-01-01
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| Series: | Indian Journal of Radiology and Imaging |
| Subjects: | |
| Online Access: | http://www.thieme-connect.de/DOI/DOI?10.4103/ijri.IJRI_296_17 |
| _version_ | 1818454427526234112 |
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| author | Ishan Kumar Ashish Verma Avinash Jain S. K. Agarwal |
| author_facet | Ishan Kumar Ashish Verma Avinash Jain S. K. Agarwal |
| author_sort | Ishan Kumar |
| collection | DOAJ |
| description | Background: Both emphysematous destruction of lung parenchyma and airway remodeling is thought to contribute to airflow limitation in cases of chronic obstructive pulmonary disease (COPD). Objective: To evaluate the value of quantitative computed tomography (QCT) parameters of emphysema and airway disease with disease severity in patients with COPD. Materials and Methods: We prospectively studied 50 patients with COPD, which included nonsmokers and patients with different degrees of cumulative smoking exposure. Three QCT parameters namely LAA% (low attenuation area percentage), WA% (Wall area percentage), and pi10 were calculated as per the standard technique. Forced expiratory volume in 1 s (FEV1), BODE score, and MMRC dyspnea scale were used as measures of disease severity. Results: FEV1 was inversely and significantly associated with all three QCT parameters. Receiver operated characteristic curves in prediction of GOLD class 3 COPD yielded cut-off values of 12.2, 61.45, and 3.5 for LAA%, WA%, and pi10, respectively, with high sensitivities and specificities. In multiple linear regression model, however, only LAA% proved to be significantly associated with FEV1, BODE, and dyspnea. Conclusion: QCT indices of both emphysema and airway disease influence FEV1, dyspnea, and BODE score in patients with COPD. Emphysema, however, appears to be more closely related to disease severity. |
| first_indexed | 2024-12-14T21:54:43Z |
| format | Article |
| id | doaj.art-856650703bf24b1bb89f26eb74fa06b6 |
| institution | Directory Open Access Journal |
| issn | 0971-3026 1998-3808 |
| language | English |
| last_indexed | 2024-12-14T21:54:43Z |
| publishDate | 2018-01-01 |
| publisher | Thieme Medical and Scientific Publishers Pvt. Ltd. |
| record_format | Article |
| series | Indian Journal of Radiology and Imaging |
| spelling | doaj.art-856650703bf24b1bb89f26eb74fa06b62022-12-21T22:46:10ZengThieme Medical and Scientific Publishers Pvt. Ltd.Indian Journal of Radiology and Imaging0971-30261998-38082018-01-0128019910610.4103/ijri.IJRI_296_17Performance of quantitative CT parameters in assessment of disease severity in COPD: A prospective studyIshan Kumar0Ashish Verma1Avinash Jain2S. K. Agarwal3Departments of Radiodiagnosis, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, IndiaDepartments of Radiodiagnosis, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, IndiaDepartments of TB and Respiratory Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, IndiaDepartments of TB and Respiratory Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, IndiaBackground: Both emphysematous destruction of lung parenchyma and airway remodeling is thought to contribute to airflow limitation in cases of chronic obstructive pulmonary disease (COPD). Objective: To evaluate the value of quantitative computed tomography (QCT) parameters of emphysema and airway disease with disease severity in patients with COPD. Materials and Methods: We prospectively studied 50 patients with COPD, which included nonsmokers and patients with different degrees of cumulative smoking exposure. Three QCT parameters namely LAA% (low attenuation area percentage), WA% (Wall area percentage), and pi10 were calculated as per the standard technique. Forced expiratory volume in 1 s (FEV1), BODE score, and MMRC dyspnea scale were used as measures of disease severity. Results: FEV1 was inversely and significantly associated with all three QCT parameters. Receiver operated characteristic curves in prediction of GOLD class 3 COPD yielded cut-off values of 12.2, 61.45, and 3.5 for LAA%, WA%, and pi10, respectively, with high sensitivities and specificities. In multiple linear regression model, however, only LAA% proved to be significantly associated with FEV1, BODE, and dyspnea. Conclusion: QCT indices of both emphysema and airway disease influence FEV1, dyspnea, and BODE score in patients with COPD. Emphysema, however, appears to be more closely related to disease severity.http://www.thieme-connect.de/DOI/DOI?10.4103/ijri.IJRI_296_17chronic obstructive pulmonary diseaselaa%pi10quantitative ctwa% |
| spellingShingle | Ishan Kumar Ashish Verma Avinash Jain S. K. Agarwal Performance of quantitative CT parameters in assessment of disease severity in COPD: A prospective study Indian Journal of Radiology and Imaging chronic obstructive pulmonary disease laa% pi10 quantitative ct wa% |
| title | Performance of quantitative CT parameters in assessment of disease severity in COPD: A prospective study |
| title_full | Performance of quantitative CT parameters in assessment of disease severity in COPD: A prospective study |
| title_fullStr | Performance of quantitative CT parameters in assessment of disease severity in COPD: A prospective study |
| title_full_unstemmed | Performance of quantitative CT parameters in assessment of disease severity in COPD: A prospective study |
| title_short | Performance of quantitative CT parameters in assessment of disease severity in COPD: A prospective study |
| title_sort | performance of quantitative ct parameters in assessment of disease severity in copd a prospective study |
| topic | chronic obstructive pulmonary disease laa% pi10 quantitative ct wa% |
| url | http://www.thieme-connect.de/DOI/DOI?10.4103/ijri.IJRI_296_17 |
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