3D Microendoscopic Electrical Impedance Tomography for Margin Assessment During Robot-Assisted Laparoscopic Prostatectomy

IEEE Transactions on Medical Imaging
Aditya MaharaR Halter

Abstract

Radially configured microendoscopic electrical impedance probes intended for intraoperative surgical margin assessment during robot-assisted laparoscopic prostatectomy (RALP) were examined through simulation, bench-top experimentation, and ex vivo tissue studies. Three probe designs with 8, 9, and 17 electrodes, respectively, were analyzed through finite element method based simulations. One mm diameter spherical inclusions ( σinclusion = 1 S/m) are positioned at various locations within a hemispherical background ( σbackground = 0.1 S/m) of radius 5 mm. An 8-electrode configuration is not able to localize the inclusion at these positions while 9 and 17-electrode configurations are able to accurately reconstruct the inclusion at maximum depth of 1 mm and 3 mm, respectively. All three probe designs were constructed and evaluated using saline phantoms and ex vivo porcine and human prostate tissues. The 17-electrode probe performed best in saline phantom studies, accurately reconstructing high contrast, 1-mm-diameter metal cylindrical inclusions in a saline bath ( σsaline = 0.1 S/m) with a position and area error of 0.46 mm and 0.84 mm2, respectively. Additionally, the 17-electrode probe was able to adequately distinguish cancerou...Continue Reading

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Citations

Jun 16, 2016·IEEE Transactions on Medical Imaging·Shadab KhanRyan J Halter
Jan 24, 2017·IEEE Transactions on Medical Imaging·Ethan K MurphyRyan J Halter
Mar 6, 2018·Annual Review of Biomedical Engineering·Xiongbiao LuoTerry M Peters
Mar 24, 2017·Physiological Measurement·Angela PathirajaRichard Bayford
Jun 10, 2020·Journal of Translational Medicine·Angela A PathirajaRichard Bayford
Sep 30, 2020·Mathematical Biosciences and Engineering : MBE·Tong SunXin Chen

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