Efficacy of the Pulmonary Ventilation-Perfusion Scintigraphy for Children with Uneven Radiolucency in the both Lung Fields

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We reported three children with uneven radiolucency in the both lungs on chest X-P. There was one with a granuloma in left main bronchus, one with a right pulmonary artery absence and the other with the Swyer-James-Macleod syndrome. The images of pulmonary ventilation-perfusion scintigraphy using Xe-133 showed a different pattern in the former two patients. In first patient with a granuloma, the images showed a decreased ventilation and perfusion distribution to the left lung with marked retention of gas on the later images. In second with PA absence, it showed a mild volume loss and a marked decreased perfusion distribution to the right lung. In third with Swyer-James-Macleod syndrome who examined only by perfusion scintigraphy using Tc-99m microspheres, it showed a decreased distribution to the left lung.<BR>Pulmonary ventilation-perfusion scintigraphy seems to be benefit for diagnosis of children with uneven radiolucency in the both lungs on chest X-P.