A．?dāng)[好體位，檢查機(jī)架角床轉(zhuǎn)角，對(duì)照射野，對(duì)源皮距 
B．?dāng)[好體位，對(duì)照射野，對(duì)源皮距，檢查機(jī)架角床轉(zhuǎn)角 
C．?dāng)[好體位，對(duì)源皮距，對(duì)照射野，檢查機(jī)架角床轉(zhuǎn)角 
D．檢查機(jī)架角床轉(zhuǎn)角，對(duì)照射野，對(duì)源皮距，擺好體位 
E．?dāng)[好體位，檢查機(jī)架角床轉(zhuǎn)角，對(duì)源皮距，對(duì)照射野