Fig. 7From: Pulmonary dust foci as rat pneumoconiosis lesion induced by titanium dioxide nanoparticles in 13-week inhalation studyRepresentative macroscopic photographs of the thoracic cavity of female rats after 13-week of inhalation exposure to TiO2 NP (50Â mg/m3, 6Â h/day, 5Â days/week). Scale bar: 1Â mm. Abbreviation: LN, lymph nodeBack to article page