量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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Optimal X-ray images are obtained from correct image positioning by radiological technologists. However, guidance for new radiological technologists is not always adequate, and new methods are required for facilitating correct image positioning. In this study, we attempted to visualize and organize the skill of image positioning by radiological technologists using hierarchical task analysis (HTA). Regarding acquisition of frontal and lateral images of the wrist joint, cervical vertebrae, and elbow, knee, and ankle joints, the actions used to acquire images taken by a radiological technologist from initiation to completion of the process of each acquisition were regarded as the target range. The HTA included three hierarchies: the goal of acquisition as the highest hierarchy, tasks that were the minimum descriptions necessary for acquisition as the second hierarchy, and subtasks representing the concrete acquisition procedure as the lowest hierarchy. The total numbers of tasks and subtasks in all HTA constructions for the 10 goals were 85 and 226, respectively. Only the highest hierarchy was needed for skilled technologists, while the middle and lowest hierarchies were needed for beginning technologists. Therefore, visualization at different technical levels employing a single construction model may be possible. Our study presents effective expression of tacit knowledge for radiological technologists.
Visualization of X-ray radiography technical process by Hierarchical task analysis (HTA)
