乳幼児呼吸同調胸部 X 線自動撮影装置の開発

概要

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We developed an original automatic exposure device in an effort to obtain better inspired chest radiograms in infants. The device employs a personal computer system to analyze changes in intra-mask pressure signals from a small mask which is placed on the patient's face, and calculates the satisfactory inspired intra-mask pressure before each exposure. Next, the device automatically releases X-rays when the intra-mask pressure reaches the appropriate level. Successful exposure rates of inspiratory radiography thus obtained were compared with those obtained manually by skilled technicians in 350 infantile chest radiograms; our automatic method showed a success rate of almost 100%, and had a statistically higher success rate than the manual method in younger infants. Other methods of automatic exposure were developed about 20 years ago; compared with these previously reported method, our computer-aided method has the advantage of being able to judge not only the phase of respiration but also the depth of respiration. From this study, we concluded that our automatic exposure device is very useful in making exact diagnosis and for comparative follow-up radiograms.
公益社団法人日本放射線技術学会の論文
1993-01-01