Fig. 4. Representative computed tomography images obtained in two patients of the multidrug-resistant strain group infected by Pseudomonas aeruginosa . Computed tomography sections were obtained before and after nebulization of colistin in a patient successfully treated with nebulized colistin monotherapy (A ) and in another patient with failure of nebulized colistin combined with a 3-day intravenous administration of aminoglycoside (B ).