从骨髓瘤的X线表现中,找出错误的() ["A.好发于颅骨,脊柱,骨盆,肋骨等部位、","B.骨质普遍稀疏","C.颅骨呈多发性穿凿状骨质破坏","D.脊柱侵蚀常破坏椎弓根","E.肋骨呈膨胀性分房状骨质破坏"]
试述高剂量率后装治疗的优点。
C神经根受压时选择颈椎牵引的最佳角度是须前屈() ["A.0°","B.10°","C.15°","D.20°","E.25°"]
下列正常肺纹理的表现,哪项是错误的() ["A.上肺纹理细,下肺纹理粗","B.肺纹理呈树枝状,越分越细","C.右下肺纹理比左下肺纹理明显","D.两上肺纹理相比,右上比左上多","E.肺纹理向下伸延,可与肝影重叠"]
何谓后装短距离治疗?
高剂量率、中剂量率和低剂量率有何不同?