Objective: to study the effects of respiratory movement frequency and scanning time on the image results in the treatment of lung cancer by stereotactic radiotherapy.
目的：研究立体定向放射治疗肺癌中呼吸运动频率与图像扫描时间对靶体积定位成像结果的影响。
2
Objective: to study the scanning and postprocessing technique of MR perfusion and its application in evaluating cerebral astrocytoma.
目的：研究MR灌注成像的扫描技术、后处理技术及其评价脑星形细胞瘤的价值。
3
Objective To investigate the practical value of axial plus coronal scanning high resolution ct (HRCT) in the diagnosis of nasal bone fracture.