Normal chest plain film ■field(area)肺野与带 Medial middle lateral area,from the hilum to the rib Upper,middle,lower field,lower rim of the 2nd/4th anterior rib as the boundary ■Lobes肺叶 Right lobe:upper,middle and lower lobe Fissures叶间裂：horizontal fissure,oblique fissure Left lobe:upper and lower lobe only (lingula) Fissure:oblique fissure Normal chest plain film ◼ field (area) 肺野与带 ◼ Medial middle lateral area, from the hilum to the rib. ◼ Upper, middle, lower field, lower rim of the 2nd/4th anterior rib as the boundary ◼ Lobes 肺叶 ◼ Right lobe: upper, middle and lower lobe ◼ Fissures 叶间裂 : horizontal fissure, oblique fissure ◼ Left lobe: upper and lower lobe only (lingula) ◼ Fissure: oblique fissure