Asbestosis is a non-cancerous disease. It is a serious and harmful disease of lungs which is developed when asbestos fibers are inhaled and embedded in the inner tissues of the lungs. Asbestos fibers are tiny fibers which penetrate into one's body through the inhalation of asbestos dust. It is believed that asbestos cannot be harmful for one's health when it is undisturbed. But when materials made of asbestos are broken they turn into dust. The latter is inhaled by people and it becomes the cause of asbestosis and the main disseminator of it. This illness is identified through cancer diagnosis . This is a test which shows the amount of asbestos fibers in one's body. The test also helps to identify the level of the disease and stage of its diffusion but it can't help to predict how the disease will develop.