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研究4名有经验的观察者对肺显像中已知解剖部位和大小的肺缺损估价的准确性。方法:局麻下对肺功能正常的健康志愿者施行纤维支气管镜插入,在检查前用~(81m)Kr肺通气显像作对照,获得后位、后斜位和侧位影像,然后在支气管镜直视下于某个选择的肺段支气管处使气囊膨胀,用与对照相同的体位获得肺通气缺损影像,以此作为受累肺段的“阴性”显像;当~(81m)Kr在肺清除和衰减后,经气囊导管孔引入~(81m)Kr和空气使孤立的肺段单独通气,确定阻塞肺段的位置和表面投影,作为肺段
Four experienced observers were evaluated for the accuracy of lung defect assessment of known anatomic sites and sizes in lung imaging. Methods: Under local anesthesia, healthy volunteers with normal lung function were treated with fiberoptic bronchoscopy. Before (81m) Kr lung ventilation imaging was used as a control, posterior, posterior oblique and lateral images were obtained, Under direct vision, the balloon was inflated at a selected segment of the bronchioles of the bronchial segment, and the image of lung ventilation defect was obtained at the same position as the control as “negative” imaging of affected lung segments. When ~ (81m) Kr was in the lung After clearance and attenuation, ~ (81m) Kr and air are introduced through the balloon catheter hole to separate the isolated lung segments and determine the location and surface projection of the obstructed lung segment as the lung segment