Uribe David Oliva, Stroop Ralf, Wallaschek Jorg
Institute of Dynamics and Vibration Research, Leibniz University of Hannover, Hannover, 30167 Germany.
Annu Int Conf IEEE Eng Med Biol Soc. 2009;2009:737-40. doi: 10.1109/IEMBS.2009.5332409.
Mechanical characteristics of tumor and healthy tissue in the brain differ but slightly. The task of designing a system that is able to differentiate tissue dignity with high sensitivity is of great importance in neurosurgery. Even when localization of tumor by use of preoperative imaging techniques provides the surgeon with valuable information to decide where and what to resect, the brain shift due to change in pressure during skull opening demands the surgeon to define the limits of the tumor using tactile and visual differentiation. This paper contains a general description of the tactile sensor system based on a piezoelectric bimorph. The main parts of the measurement system are described and the selection of the electrical parameters for tactile differentiation is justified. Results are discussed for a series of measurements at different concentrations in gelatin phantoms.
大脑中肿瘤组织和健康组织的力学特性差异甚微。设计一个能够高灵敏度区分组织性质的系统，这一任务在神经外科手术中至关重要。即便利用术前成像技术对肿瘤进行定位能为外科医生提供有价值的信息，以决定切除的部位和内容，但颅骨切开过程中因压力变化导致的脑移位，要求外科医生通过触觉和视觉辨别来确定肿瘤的边界。本文对基于压电双晶片的触觉传感器系统进行了总体描述。阐述了测量系统的主要部件，并说明了用于触觉辨别的电学参数的选择依据。讨论了在明胶模型中不同浓度下一系列测量的结果。
