Angulation roentgenograms in obscure lung lesions: a standardized technique.

Postero-anterior films of the chest frequently fall to reveal satisfactory evidence of the pathology which may be present. To obtain a better perspective of the lung lesions, it is often necessary to resort to lordotic and oblique films. The value of such positional roentgenograms, however, has been limited because the importance of definite methods of standardizing these films has not received sufficient consideration. Sherman W. Atwell’ recently stressed the importance of standardized oblique roentgenography of the chest, and observed that properly positioned oblique films can “open” obscure areas of the hllum, apex, and other parts of the lung. He has described an apparatus for standardizing films in the oblique projection.