Abstract
We propose a new and complementary approach to image guidance for monitoring medical interventional devices (MID) with human tissue interaction and surgery augmentation by acquiring acoustic emission data from the proximal end of the MID outside the patient to extract dynamical characteristics of the interaction between the distal tip and the tissue touched or penetrated by the MID. We conducted phantom based experiments (n = 955) to show dynamic tool/tissue interaction during tissue needle passage (a) and vessel perforation caused by guide wire artery perforation (b). We use time-varying auto-regressive (TV-AR) modelling to characterize the dynamic changes and time-varying maximal energy pole (TV-MEP) to compute subsequent analysis of MID/tissue interaction characterization patterns. Qualitative and quantitative analysis showed that the TV-AR spectrum and the TV-MEP indicated the time instants of the needle path through different phantom objects (a) and clearly showed a perforation versus other generated artefacts (b). We demonstrated that audio signals acquired from the proximal part of an MID could provide valuable additional information to surgeons during minimally invasive procedures.
Highlights
Medical interventional devices (MIDs) such as needles, catheters or guide wires are frequently used to provide access for minimally invasive therapy and diagnosis[1]
When a needle is inserted into soft tissue, interaction forces are developed at the needle tip and along the needle shaft when the MID passes through different tissue layers such as skin, muscle, and fat
In this work we propose a new approach for MID/tissue interaction monitoring and surgery augmentation using acoustic emission (AE) data acquisition from the proximal end of a conventional clinically used device to extract dynamical characteristics of the interaction between the distal tip and the tissue
Summary
Medical interventional devices (MIDs) such as needles, catheters or guide wires are frequently used to provide access for minimally invasive therapy and diagnosis[1] These procedures include applications such as tissue biopsies, brachytherapy seed placement, regional anaesthesia, vascular catheter-based procedures, and percutaneous tumour therapies like radiofrequency or cryo ablation[1,2]. In all these procedures the operator needs to introduce the MID into the body and guide it toward the target site following a prediagnostically determined or intraoperatively image guided path without unwanted damaging of important structures or organs. The main drawback of these approaches is that the sensors are usually located at the distal end of the guide wire, i.e., invasively in the part of the device that is inserted inside the body. In contrast with recent papers on surgical soundtracks or auditory display[13,14], which use medical image analysis for sonification, this work aims at acquiring, modifying and amplifying natural sounds of tool/tissue interactions
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