The best scanningtime is about 74 seconds. On continuing observation, the scanning interval should be a little longer and it will not lose the time of observation.
扫描开始时间应以74秒前后为佳,持续观察时,扫描间隔时间宜长,且不会错过观察时机。
3
Objective: to study the effects of respiratory movement frequency and scanningtime on the image results in the treatment of lung cancer by stereotactic radiotherapy.