Mammographic needle localization of lesions seen in only one view.

A new xeromammographic needle localization technique for occult breast lesions seen on only one view is described, which permitted successful localization of an occult lesion visible only on mediolateral projection. To test its accuracy, the method was also applied to 15 other cases (16 lesions) where the lesion was seen in two views, but localization was performed as if it were seen in one view only. The technique takes advantage of the geometry of x-ray beam angulation and triangulation.