The ILO International Classification of Radiographs of Pneumoconioses is a system of Since , the ILO has periodically published guidelines on how to classify chest X-rays for pneumoconiosis. The purpose of the Classification was to. ILO Classification The International Labour Organization (ILO) is a specialized agency of the Radiograph showing Simple Coal Workers’ Pneumoconiosis. The object of the classification is to codify the radiographic . defect likely to impair classification of the radiograph of pneumoconiosis. 3, Poor.

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Summary of details of classification. More in this category: The essential principle is that all lf which are consistent with those defined and represented in the standard radiographs and the guideline for the use of the ILO International Classification, are to be classified.

The Classification System includes the Guidelines and two sets of standard films. Links with this icon indicate that you are leaving the CDC website. The pleural thickening present face on, is of indeterminate width, and extent 2.


The classification does not imply legal definitions of pneumoconioses for compensation purposes, nor imply a level at which compensation is payable. Calcification in small pneumoconiotic opacities. Finally, other abnormal features of the chest radiograph can be commented upon ILO This is because of its special importance in relation to pleural diffuse thickening. Discussion in particular at the Seventh International Pneumoconioses Conference, held in Pittsburgh inindicated the need for improvement of some parts of the classification, in particular those concerning pleural changes.

The most important condition for using this system of classification with full value from a scientific and ethical point of view is to read, at all times, films claassification be classified by systematically referring to the 22 standard films provided in the ILO International Classification set of standard films. The category of profusion is based on assessment of the concentration of opacities by comparison with the standard radiographs.


The small opacities are difficult to classify because of the presence of the classificatiln opacities. Definition of pleura is slightly imperfect. This chapter extends the applicability of the ILO scheme to classifications of results from digital radiographic images of the chest.

ILO Classification – Wikipedia

Emphysema in upper zones. Profusion of small opacities is more marked in right lung. The ILO Classification system pertains to pulmonary parenchymal abnormalities small and large opacitiespleural changes pleural plaques, calcification, and diffuse pleural thickening and other features associated, or sometimes confused, with occupational lung disease.

Whether plaques are classified or not should be merely indicated by a symbol. Category O—small opacities absent or less profuse than the lower limit of category 1. Classifciation is not responsible for Section compliance accessibility on other federal or private website.

The category of profusion is determined by considering the profusion as a whole over the affected zones of the lung and by comparing this with the standard radiographs. Not associated small calcifications. Large opacities are defined as any opacity greater than 1 cm that is present in a film.

Abnormality of cardiac size or shape. Note the left costophrenic angle obliteration. Comments should be recorded pertaining to the classification of the radiograph, particularly if some other cause is thought to be responsible for a shadow which could be thought by others to have been due to pneumoconiosis; also to identify radiographs for which the technical quality may have affected the reading materially. The relevant text from the earlier edition is reproduced in this edition, and the associated sets of standard radiographs remain available from the ILO.

Acceptable, with no technical defect likely to impair classification of the radiograph of pneumoconiosis. Note shrinkage in lower lung fields. Pleural thickening in the interlobar fissure of mediastinum. Kerley lines in lower right zone.

The summary of the classification is given in table 2. Monday, 28 February The new text in chapter 6 identifies principles for viewing digitally acquired images of the chest and covers effective acquisition, display and storage of digital images. This page was last edited on 9 Septemberat The obliteration of the costophrenic angle should be systematically noted whether it exists or radiogdaphs. Since, it has been revised several times, the last time inalways with the objective of providing improved versions to be extensively used for clinical and epidemiological purposes.


Two types of pleural thickening of the chest wall are recognized: If a pleural thickening is circumscribed, it could be pneumoconuosis as a plaque. They are then asked to categorize small opacities classifiction to shape and size. Three sizes are defined by the appearances on standard radiographs: The ILO Classification system includes the printed Guidelines and sets of standard radiographs, available in both film and, as ofdigital forms.

ILO Classification

The Body Part II. Category C — one or more opacities whose combined area exceeds the equivalent of the right upper zone.

This revised edition of the Guidelines supplements the preceding edition with an entirely new Chapter 6.

Pleural abnormalities diffuse pleural thickening, plaques and obliteration of costophrenic angle are also illustrated on different radiographs.

By using this site, fof agree to the Terms of Use and Privacy Fot. Classification Scheme The Classification System includes the Guidelines and two sets of standard films. It is now extensively used internationally for epidemiological research, for the surveillance of those industry occupations and for clinical purposes. In use, it provides a system for both epidemiological comparisons of many individuals exposed to dust and evaluation of an individual’s potential disease relative to established standards.

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