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High-resolution CT in Silicosis: correlation with radiographic findings and functional impairment.

Authors
Cavalcanti dos Santos Antão-V; Pinheiro-GA; Terra-Filho-M; Kavakama-J; Muller-NL
Source
J Comput Assist Tomogr 2005 May-Jun; 29(3):350-356
NIOSHTIC No.
20028884
Abstract
To assess high-resolution computed tomography (HRCT) findings in silicosis and to better define the role of HRCT in early detection of parenchymal abnormalities in silica-exposed workers. Forty-one stone carvers were evaluated with chest radiographs (CR), HRCT, and pulmonary function tests (PFT). Inter-reader agreement was calculated using the kappa statistic (k). Correlation between radiographic and HRCT profusion scores and PFT was assessed using the Spearman correlation coefficient. The most common HRCT findings were branching centrilobular structures, seen in 28/41 workers (68.3%). Nodules consistent with silicosis were detected in 53.7% workers on CR and in 56.1% workers on HRCT. Inter-reader agreement for diagnosis of silicosis was better on HRCT (k = 0.84) than on CR (k = 0.54). Small opacity profusion on HRCT correlated inversely with total lung capacity and FVC%. Profusion of opacities on HRCT correlates with functional impairment. The presence of branching centrilobular structures may be helpful in early recognition of silicosis.
Keywords
Silicosis; Radiographic-analysis; Radiography; Occupational-exposure; Silica-dusts; Silicates; Pulmonary-function-tests; Workers; Worker-health; Exposure-levels; Exposure-assessment; Surveillance; Author Keywords: silicosis; stone carving; HRCT; ILO reading; kappa statistics
Contact
Dr. Vinicius C.S. Antao, 132 Bakers Drive, Morgantown, WV 26505
Publication Date
20050501
Document Type
Journal Article
Email Address
VAntao@cdc.gov
Fiscal Year
2005
NTIS Accession No.
NTIS Price
Issue of Publication
3
ISSN
0363-8715
NIOSH Division
DRDS
Source Name
Journal of Computer Assisted Tomography
State
WV
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