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Texture Analysis of Opacity Profusion in Chest Radiographs of Miners With Pneumoconiosis.

Authors
Soliz-P; Pattichis-C; Pattichis-M; James-D; Ketai-L
Source
Am J Respir Crit Care Med 2002 Apr 165(8)(Suppl):A529
NIOSHTIC No.
20022995
Abstract
Individuals who have been exposed through their occupations to high levels of dust, asbestos, or other particulates are at risk for interstitial lung diseases such as pneumoconiosis. These individuals must have periodic examinations including chest radiographs to monitor for signs of the opacities associated with pneumoconiosis. The International Labor Organization (ILO) has established a protocol to score the degree of profusion, size, and shape of opacities. This research assessed texture analysis techniques for quantitatively characterizing the nature of the opacities as presented through ribs and parenchyma. Radiographs were of coal-mine or silica dust exposed miners participating in a health screening program. A total of 252 regions of interest (ROls) (166, 49, 21, 16 and 9 with profusions of category (shape and size) 0, l(q), I(r), 2(q) and 2(r) respectively) were identified from 80 digitized chest radiographs by two B-readers. Fifty-eight different texture features were computed. The non-parametric Wilcoxon rank sum test was carried out to compare the different profusion categories versus that of profusion O. Results showed that significant differences exist (at a=0.05) between 0 vs I(q), 0 vs I(r), 0 vs 2(q) and 0 vs 2(r) for 44, 17,46 and 6 features respectively. For each group, the median and the spread of the data {difference between the 75th and 25th percentile} for a few features are given.
Keywords
Dusts; Dust-particles; Asbestos-dust; Particulate-dust; Pneumoconiosis; Radiographic-analysis; Radiography; Screening-programs; Mine-workers; Underground-miners; Respiratory-system-disorders; Pulmonary-system-disorders; Coal-mining; Coal-miners
CODEN
AJCMED
Publication Date
20020401
Document Type
Abstract; Conference/Symposia Proceedings
Funding Amount
99,320
Funding Type
Grant
Fiscal Year
2002
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R43-OH-003595
Issue of Publication
8
ISSN
1073-449X
Priority Area
Pulmonary System Disorders; Other Occupational Concerns
Source Name
American Journal of Respiratory and Critical Care Medicine, 2002 International Conference, The American Thoracic Society, Atlanta Georgia, May 17-22, 2002
State
NM
Performing Organization
Kestrel Corporation, Albuquerque, New Mexico
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