Fibrosis And Metal Dust Does Anyone Know Of Any Tests That Can Detect Metal In Lung Tissue?

Does anyone know of any tests that can detect metal in lung tissue? - fibrosis and metal dust

My father died in January this year of lung fibrosis.
It is the general opinion of the consultants and doctors, that they caused by metal dust in lung tissue from a previous work (ie, chromium).
There may be others, such as nickel, cobalt, aluminum, etc.
Basically I'm trying to find out whether there is evidence that its able to recognize metal dust in the lung tissue.
My parents lungs were stored pending further investigation and we want a deal on this immediately, so any help would be appreciated to achieve.