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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The pleural thickening present face on, is of indeterminate width, and extent 2. The zones in which the opacities are seen are recorded. Links with pneuomconiosis icon indicate that you are leaving the CDC website.

Three sizes are defined by the appearances on standard radiographs: 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. Abnormality of cardiac size or shape. The most recent edition of the Guidelines, [2] completed inreplaced the revised edition.

This is because of its special importance in relation to pleural diffuse thickening. Two types of pleural thickening of the chest wall are recognized: Sincethe ILO has periodically published guidelines on how to classify chest X-rays for pneumoconiosis.

Pleural thickening of the chest wall is recorded radioographs for the right R and left L thorax.

classificwtion Irregular small opacities are classified by width as s, t, or u same sizes as for small rounded opacities. The Classification is based on a set of standard radiographs, a written text and a set of notes OHS No. The purpose is to radiograohs and codify radiographic abnormalities of pneumoconioses in a simple, systematic, and reproducible manner. They were identified according to the six zones—upper, middle and lower, of both right and left lungs.

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Facebook Twitter Email Syndicate. Nevertheless, the classification has been found to have wider uses than anticipated. The Foreword to this revised edition defines the nomenclature used to distinguish different types of chest images.

The category of profusion is based on assessment of the concentration of opacities by comparison with the standard radiographs. Some countries have established legal requirements for use of the Classification in the assessment of compensation claims, classiffication the Classification was not originally designed for this purpose.


This page was last edited on 9 Septemberat Category B — one or more opacities larger or more numerous than those in category Raduographs whose combined area does not exceed the equivalent of the right upper zone. It retained the principle of former classifications and If a pleural thickening is circumscribed, it could be identified as a plaque. The reader compares the subject chest X-ray only the appearances seen on postero-anterior, or PA, chest x-ray with those of the standard set.

These are pnejmoconiosis as category A for one or more large opacities whose combined dimension does not exceed 5 cmcategory B for one or more large opacities whose combined dimension exceeds 5 cm but does not exceed the equivalent area of the right upper lung zoneor category C size is greater than category B.

The ILO International Classification of Radiographs of Pneumoconioses is a system of classifying chest radiographs X-rays for persons with a or, rarely, more than one form of pneumoconiosis.

ILO International Classification of Radiographs of Pneumoconioses

The description of standard radiographs is given in table 1. It deals with parenchymal abnormalities small and large raduographspleural changes, and other features associated, or sometimes confused, with occupational lung disease. Emphysema in upper zones.


Monday, 28 February This revised edition of the Guidelines supplements the preceding edition with an entirely new Chapter 6. The letters p, q and r denote the presence of small, rounded opacities. Views Read Edit View history. If the reader attempts to classify a film without referring to any of the standard films, then no mention of reading according to the ILO International Classification of Radiographs should be made.

Cancer of lung or pleura.

The standard films represent different types and severity of abnormalities and are used for comparison to subject films during the classification process. The classification does not define pathological entities, nor take into account working capacity.

Whether plaques are classified or not should be merely indicated by a symbol. This chapter extends the applicability of the ILO scheme to classifications of results from digital radiographic images of the chest.

Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on radiograpjs website. A plaque involving the diaphragmatic pleura is recorded as present Y classlfication absent Nseparately for the right R and left L thorax. The heart shadow is slightly displaced to the left.

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. The Classification System includes the Guidelines and two sets of standard films.

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