Section 5(2)(a) in The M.P. Workmens Compensation (Occupational Diseases) Rules, 1963
(a)The radiological examination of the workmen must reveal :-(i)the appearance of generalised micronodular or nodular fibrosis covering a considerable part of both lung fields whether accompanied or not by signs of pulmonary tuberculosis;(ii)in addition to a marked accentuation of the pattern of both lungs, the appearance of one or several pseudotumoral fibrotic formations, whether accompanied or not by signs of pulmonary tuberculosis; or(iii)Serial radiological pictures taken over a period during periodical medical examinations shall as far as possible, be considered in making definite diagnosis in cases where doubt exists;