日本放射線技術学会雑誌
Online ISSN : 1881-4883
Print ISSN : 0369-4305
呼吸性動態解析の可能な新しいスクリーニング胸部X線撮影法
田中 利恵真田 茂鈴木 正行松井 武司魚山 義則
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58 巻 (2002) 5 号 p. 665-669

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To develop a new method of screening chest radiography that would provide respiratory kinetics easily and automatically using flat-panel-detector capacitated fluoroscopy, we carried out a motion analysis of the diaphragm at several respiratory phases. We obtained five chest radiographs of healthy volunteer at five respiratory phases, from maximum inspiration to normal expiration. The edges of the diaphragm were enhanced by the first derivative filter, which select edge graduents within a limited range of orientations, and were detected by thresholding and analysis of connectivity in the horizontal direction. We measured the distance from the apex to the diaphragm as well as the changes at each phase. The apex was determined previously at the step of lung-region recognition. At the costophrenic angle, the change in the distance from the apex to the diaphragm was 2.44 cm on the right and 3.06 cm on the left, while at the paramedian region the changes were 0.74 cm on the right and 1.36 cm on the left. This new method of chest examination with computer analysis can provide information on diaphragm kinetics during respiration. In addition, it may aid in the early diagnosis of diseases such as chronic pulmonary emphysema and phrenic nerve paralysis.

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© 2002 公益社団法人 日本放射線技術学会
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