众所周知，用于临床不同诊断和治疗目的的各种介入性穿刺技术，特别是在超声、CT等影像技术引导下的介入性穿刺技术的临床应用十分普遍，并越来越显示出其在临床工作中的重要作用和地位。然而，在实际操作过程中，对于穿刺针深度的把握十分关键，它不仅关系到能否将穿刺针送到 As we all know, for clinical diagnosis and treatment of various interventional puncture techniques, especially in the ultrasound, CT and other imaging techniques under the guidance of the clinical application of percutaneous puncture is widespread, and more and more shows its clinical work In the important role and status. However, in practice, it is very important to grasp the depth of the puncture needle. It is not only related to whether the puncture needle can be delivered