Figure 4From: The expanding role of aerosols in systemic drug delivery, gene therapy and vaccination: an updateGamma camera images of four adult patients with cystic fibrosis and different FEV 1 values showing distribution of an aerosol containing the radioisotope 99mtechnetium. Uniform deposition of aerosolized radioisotope is reduced in patients with low FEV1 and severe obstruction (from Reference [15] with Permission).Back to article page