Inhalation lung scintiphotos of good quality with a minimum of bronchial deposition have been obtained using a simple, inexpensive nebulizing system and technetium in the pertechnetate form. The method described is a rapid means of obtaining useful information regarding airway patency with no radiopharmaceutical preparation. Pertechnetate is a suitable radiopharmaceutical for inhalation lung studies providing scintiphotos are obtained during the inhalation phase and not exclusively after inhalation ceases, when pertechnetate is rapidly cleared from the lungs.