小児頭部CT検査における自動露出制御の一手法-年齢および頭部サイズを考慮した標準偏差(SD)値の設定法-
スポンサーリンク
概要
- 論文の詳細を見る
We examined the optimum conditions for pediatric brain CT scans. CT controls the X-ray transit dose using tube current alteration called automatic exposure control (AEC) to adjust the standard deviation (SD) value for each scanning region, and it also reduces exposure. If the SD value is inappropriate, children may be exposed to increased radiation. Therefore we acquired images of 500 children from the server, and examined the most suitable SD value for each age using the data of their SD value and age. X-ray transit control with AEC was influenced by scan position and the age of a child. We enabled accurate scanning and decreased radiation exposure by adjusting AEC to the age and the cephalic volume of each child. As a result, reduction of the X-ray exposure by up to 31.2% per slice in tube current alteration was possible using a suitable SD value for each age. On the other hand, it was possible to reduce X-ray exposure by up to 67.9% per slice with the scan technique that used age and corrected cephalic volume without adjusting AEC. Using the tube current alteration protocol for each age with the data of the SD value or cephalic volume in CT, we can more easily conduct scans of children under optimal conditions.
論文 | ランダム
- リンパ腫に対する分子標的薬 (特集 がん幹細胞と支持細胞を標的とする薬剤の開発)
- 悪性リンパ腫びまん性大細胞型Bリンパ腫(Diffuse large B-cell lymphoma)の発生母地と亜分類に関する検討
- 悪性リンパ腫における分子標的治療 (特集 消化器癌における分子標的治療)
- Treadmill運動負荷試験にて心室頻拍が誘発された症例における心拍数変動の検討 : 日本循環器学会第67回北海道地方会
- 134 ストレスファイバー形成のひずみ限界に基づく繰返し変形下でのファイバー配向の理論的予測