<prompt> Middle lobe of lung is best visualized by:AP viewRight anterior oblique viewPA viewLordotic view  <response>: Ans: d Lordotic view Ref: Grainger, 4th ed, p 276; William Brant, p. 329Best view for right middle lobe is Lordotic view.Some important views and structures demonstratedRAO Right anterior oblique-Right lung, left atrium, gall bladder, mitral valveLAO Left anterior oblique-Tracheal bifurcationRPORight posterior oblique-Right retrocardiac spaceLordotic view-For apex, lingular lobe, right middle lobe of lungReverse lordotic view-To detect interlobar effusion.Various types of X-ray films Expiratory film is required in -pneumothorax and foreign body Inspiratory film is required in chest X-ray PA view. Renal scan-done in prone position. Barium meal in hiatal disorder-done in trendelenberg positionViews1. Oblique view- Cpondylolisthesis, scaphoid.2. Von Rosen view- Congenital dislocation of hip.3. Sky line view- patella.4. Strykers view- Recurrent subluxationdislocation of shoulder.5. Lateral skull view- Sella tursica, sphenoid sinus6. Waters viewoccipitomental- maxillary sinus, maxillary antrum and floor of orbit.7. Caldwell viewoccipitofrontal-frontal sinuses, superior orbital fissure, ethmoidal sinus. 