Thursday, February 15, 2024
问题:当声波穿过两种不同介质的界面时会发生折射是因为什么不同?( )...
Thursday, September 15, 2022
Thursday, September 15, 2022
Sunday, September 18, 2022
Thursday, September 22, 2022
问题:单选题消除切片(断层)厚度伪像应选择以下哪项技术?( )A 高密度、多阵元高频探头B 多焦点聚焦探头技术C 环阵聚焦探头D 三维空间聚焦技术E 以上技术均不正确...
Saturday, September 30, 2023
问题:声速失真伪像可由于实际声速差别过大引起,超声表现为图像失真、测量误差。下列哪项最显著?( )...
Thursday, September 22, 2022
问题:急诊患者收入急诊观察室,观察时间一般不超过( )天,最多不超过一周。...
Thursday, September 22, 2022
Tuesday, September 20, 2022
问题:关于多普勒超声的描述,下列哪一项是错误的?( )...
Tuesday, September 20, 2022
问题:多数认为诊断用超声在多少声功率时对人体无损害?( )...
Thursday, September 22, 2022
Wednesday, September 20, 2023
问题:单选题直径1cm左右的肝、肾囊肿常表现为低回声,下列哪项是此现象的原理?( )A 后壁增强效应B 侧壁回声失落效应C 部分容积效应D 旁瓣效应E 镜像效应...
Saturday, September 30, 2023
Wednesday, September 21, 2022
问题:根据美国FDA对产科胎儿超声照射强度规定,应将空间峰值脉冲平均声强(ISPPA)控制在( )。...
Thursday, September 22, 2022
Sunday, September 18, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022