補償フィルタを用いた肺門部断層撮影の臨床的考察

概要

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A compensating filter has been employed for hilar tomography in over 1,200 cases. The visuability of bronchovascular shadows using the filtered tomography was analyzed. The filtered tomograms clearly showed a bronchial tree from the carina to the proximal portion of the lower lobe bronchus in over 95% of the cases examined, except for unfavorable cases due to overlapping lesions. However, as for the left lower region compared with the other regions, the visuability of the anatomical architecture decreased because of the inappropriate shape of the filter and as a result of technical errors. Next, the previous straight type of filter was reshaped so as to be adapt able to the mediastinal structure. As a result, the newly reformed filter improved the visuability of the distal portion of the lower lobe bronchus, central part of left lower vein, and its peripheral part by 23.9%, 5%, and 17.0%, respectively, compared with the previous filter, and reduced the amount of technical errors.
公益社団法人日本放射線技術学会の論文
1985-05-01