Conclusions
Our study of asbestos-exposed workers showed that SHS exposure can induce processes in the lungs detected as GGO and linear/irregular opacities in HRCT. Such findings may be the early signs of RB or DIP. Thus our study supports previous evidence that SHS has adverse effects on the lungs that can be detected by objective radiological methods. Such effects of SHS exposure on HRCT should be investigated in larger samples with heavier exposure levels before making any definite conclusions, but identifying suitable study groups for this purpose may be challenging.