相位编码是通过施加梯度场,使不同位置磁矢量的不同而进行编码定位()
A.频率
B.相位
C.加权
D.大小
E.层厚
参考答案:B
沸腾炉干燥风机的电流控制在()范围大
A.<45A
B.45~50A
C.>50A
A client with recurred cancer is planned to take internal radiation treatment with a radium implant. The client tells the nurse that she is concerned about being radioactive and has been having nightmares about the treatment. What would be a reasonable explanation for the nurse to give to the client()
A. "Careful shielding prevents the area above your waist from radioactivity. "
B. "These nightmares indicate that you’re in the denial phase of accepting the diagnosis. "
C. "The radioactive material is controlled and stays with the source; once the material is removed, no radioactivity will remain. "
D. "The radioactivity will gradually decrease, and you will be discharged when the radioactive material reaches its half-life. \