動画対応フラットパネルディテクタによる肺機能画像診断法 : 肺シンチグラフィ所見との比較

金沢大学医薬保健研究域保健学系Pulmonary ventilation and circulation dynamics are reflected on dynamic chest radiographs as changes in X-ray translucency,i.e., pixel values. The present study was performed to develop a pulmonary functional evaluation method based on the changes in pixel value, and to investigate the clinical usefulness of our method. Sequential chest radiographs of 20 subjects (abnormal,n=12; normal,n=8) during respiration were obtained with a dynamic flat-panel detector (FPD) system. The average pixel value in each local area was measured tracking the same area. To facilitate visual evaluation, the results were mapped on the original image using a grayscale in which small changes were shown in black and large changes were shown in white. In our clinical evaluation in comparison with a pulmonary scintigraphy, pulmonary ventilation disorder was indicated as a reduction of changes in pixel values. In many patients, there was a correlation between our result and a pulmonary scintigraphy (0.7<r, 4 cases; 0.4<r<or=0.7, 6 cases; 0.2<r<or=0.4, 1 case; 0<r<or=0.2, 1 case). The present method with real-time computer analysis is expected to be a rapid and simple method for evaluating pulmonary function and as an additional examination in conventional chest radiography

上下顎同時移動術を行った骨格性下顎前突症の4例

Mandibular prognathism with poor devedopment of the upper jaw was subjected to maxilla by Le Fort I osteotomy, and simultaneously the lower jaw to maxilla by sagital splitting (Obwegeser-Dal pont) osteotomy, resulting in a simultaneous two jaw surgery correction. The prognosis was satisfactory and facial shape recovered well