This paper describes a computer-aided diagnosis (CAD) method to classify pneumoconiosis on HRCT images. In Japan, the pneumoconiosis is divided into 4 types according to the density of nodules: Type 1 (no nodules), Type 2 (few small nodules), Type 3-a (numerous small nodules) and Type 3-b (numerous small nodules and presence of large nodules). Because most pneumoconiotic nodules are small-sized...

RATIONALE Using magnetic resonance imaging (MRI), we diagnosed pneumoconiosis by identifying the content and distribution of hydrogen protons in the water molecules in different tissues and lesions. PATIENT CONCERNS 25 cases of CWP patients with progressive massive fibrosis (PMF) lesions. DIAGNOSES Patients were correctly diagnosed, with one case each of Phase I and II pneumoconiosis and 23...

Four patients are described in whom pneumoconiosis was diagnosed towards the end of a lifetime's work in shale mines. All developed complicated pneumoconiosis, diagnosed in two cases at necropsy, in one by lobectomy, and in one radiologically. Two of the patients were found at necropsy also to have peripheral squamous lung cancer. The clinical and histological features of the disease resembled ...

In a study of slate workers in four areas in North Wales 725 workers and ex-workers who had been exposed to slate and to no other dust were seen, together with 530 men from the same area who had never been exposed to any dust. Evidence of pneumoconiosis was found in one-third of the slate workers, and 10% had degrees of pneumoconiosis that would attract compensation (category 2 or higher). The ...

Four men who mined barytes in Scotland and who developed pneumoconiosis are described. Three developed progressive massive fibrosis, from which two died; and one developed a nodular simple pneumoconiosis after leaving the industry. The radiological and pathological features of the men's lungs were those of silicosis and high proportions of quartz were found in two of them post mortem. The quart...

Chest radiographs of 661 British electric-arc welders have been examined by three film readers experienced in the radiology of pneumoconiosis. About 7% of the welders showed signs of small rounded opacities of category 0/1 or greater. No definite evidence of large opacities (Progressive Massive Fibrosis) was seen. The prevalence of chest abnormalities other than pneumoconiosis was 7%. A clear a...

The diagnosis of pneumoconiosis during life depends upon an industrial history and radiological examination (Carpenter, Cochrane, Gilson, and Higgins, 1956). However, many miners complain of dyspnoea but have no radiological changes at all. This has led to the supposition that long exposure to industrial dust hazards may lead to pulmonary disability which is not typical pneumoconiosis (Carpente...

This paper presents a comparison between the construction and the coal mining industries in the USA relating to the different types of pneumoconiosis (i.e. silicosis, asbestosis, Coal Worker’s Pneumoconiosis (CWP), and byssinosis) in order to determine the relationships between each type of pneumoconiosis and the occupations in both industries that are mostly affected by the disease. In this st...