2014-04-24Following robotic assisted laparoscopic prostatectomy (RALP), surgical margins are assessed for presence of cancerous tissues. An EIS/EIT based approach to identify benign and malignant tissues was evaluated. Excised prostates were probed using a micro-endoscopic EIT probe, and impedance measurements corresponding to benign and tumorous regions are compared.
2014-04-24A calibration approach has been developed for use with the EIT systems that are significantly influenced by parasitic impedances associated with switches, multiplexers and channel-to-channel coupling. Calibrated data acquired from saline tank experiments is compared with the data obtained from a forward simulation of the experiment.
2014-04-24We describe a simulation study evaluating different electrode configuration for a microendoscopic EIT probe intended to intraoperatively assess surgical margins during radical prostatectomy. In our simulation study, we analyze the performances of three probe designs with varying number of electrodes (8, 9, and 17) and configurations (dependent on number of electrodes).
2014-04-26The electrical conductivity of soft tissues can be reconstructed from imaging with MR Electrical Properties Tomography (MR-EPT). The reconstruction method used here is based on an inverse problem formulation, with two advantages over a direct inversion approach: a) no spatial differentiation is needed and b) the regularization term determines the resolution of the reconstructed data. The process is exemplified using phantom (gelatine and saline) data.