超声仪器调节课件.ppt

1、FOURTH MILITARY MEDICAL UNIVERSITY1FOURTH MILITARY MEDICAL UNIVERSITY2FOURTH MILITARY MEDICAL UNIVERSITY3监视器的调节监视器的调节FOURTH MILITARY MEDICAL UNIVERSITY4FOURTH MILITARY MEDICAL UNIVERSITY5 亮度对比度 灯光棒背景亮度FOURTH MILITARY MEDICAL UNIVERSITY6FOURTH MILITARY MEDICAL UNIVERSITY7FOURTH MILITARY MEDICAL UNIVE

2、RSITY8探头种类探头种类体表体表:腔内：经食道腔内：经食道,经直肠经直肠,经阴道经阴道,血管腔内血管腔内穿刺活检穿刺活检:术中探头术中探头:FOURTH MILITARY MEDICAL UNIVERSITY9FOURTH MILITARY MEDICAL UNIVERSITY10FOURTH MILITARY MEDICAL UNIVERSITY11FOURTH MILITARY MEDICAL UNIVERSITY12FOURTH MILITARY MEDICAL UNIVERSITY13FOURTH MILITARY MEDICAL UNIVERSITY14FOURTH MILITA

3、RY MEDICAL UNIVERSITY15应用范围应用范围视野宽大视野宽大FOURTH MILITARY MEDICAL UNIVERSITY16应用范围应用范围FOURTH MILITARY MEDICAL UNIVERSITY17探头选择探头选择FOURTH MILITARY MEDICAL UNIVERSITY18FOURTH MILITARY MEDICAL UNIVERSITY19探头使用注意事项：探头使用注意事项：FOURTH MILITARY MEDICAL UNIVERSITY20扫描方式扫描方式FOURTH MILITARY MEDICAL UNIVERSITY21扫描成

4、像方式各异的探头说明扫描成像方式各异的探头说明FOURTH MILITARY MEDICAL UNIVERSITY22相控阵扫描相控阵扫描FOURTH MILITARY MEDICAL UNIVERSITY23几何分辨力几何分辨力FOURTH MILITARY MEDICAL UNIVERSITY24厚度厚度纵向纵向(轴向轴向)横向横向(侧向侧向)FOURTH MILITARY MEDICAL UNIVERSITY25FOURTH MILITARY MEDICAL UNIVERSITY26脉冲有效宽度脉冲有效宽度 纵向分辨力纵向分辨力 FOURTH MILITARY MEDICAL UNIVE

5、RSITY27FOURTH MILITARY MEDICAL UNIVERSITY28FOURTH MILITARY MEDICAL UNIVERSITY29FOURTH MILITARY MEDICAL UNIVERSITY30动态范围动态范围FOURTH MILITARY MEDICAL UNIVERSITY31FOURTH MILITARY MEDICAL UNIVERSITY32聚焦：使超声汇聚收敛聚焦：使超声汇聚收敛电子聚焦：对电子聚焦：对一组一组阵元激励阵元激励延迟，延迟，使使合成合成声束汇聚收敛。声束汇聚收敛。与相控阵区别FOURTH MILITARY MEDICAL UNIVE

6、RSITY33FOURTH MILITARY MEDICAL UNIVERSITY34单焦点：单焦点：一种聚焦延迟曲线一种聚焦延迟曲线多焦点多焦点(非实时非实时,即帧频即帧频低低):全程聚焦全程聚焦:使焦点随声波传播位置变化使焦点随声波传播位置变化,从而达到从近从而达到从近-远场的声束都远场的声束都 汇聚收敛汇聚收敛.(数字超声数字超声)近近中中远远FOURTH MILITARY MEDICAL UNIVERSITY35收发电路显示高频放大检 波前处理A/DDSC后处理D/A超声诊断仪的工作流程框图超声诊断仪的工作流程框图换能器打印FOURTH MILITARY MEDICAL UNIVERS

7、ITY36 FOURTH MILITARY MEDICAL UNIVERSITY37FOURTH MILITARY MEDICAL UNIVERSITY38FOURTH MILITARY MEDICAL UNIVERSITY39彩色血流显像特征彩色血流显像特征FOURTH MILITARY MEDICAL UNIVERSITY40帧频帧频FOURTH MILITARY MEDICAL UNIVERSITY41影响测量精度的因素影响测量精度的因素FOURTH MILITARY MEDICAL UNIVERSITY42FOURTH MILITARY MEDICAL UNIVERSITY43FOURTH MILITARY MEDICAL UNIVERSITY44FOURTH MILITARY MEDICAL UNIVERSITY45再再 见见