Optimization of Object Injection Current in the Development of Electrical Impedance Tomography for Bone Fracture Detection

Abstract

Electrical Impedance Tomography (EIT) nearly has all the parameters of the ideal of a modality tomography. There is one parameter that makes the EIT modality not yet ideal. It is the low spatial resolution of the image. Unfortunately, it is limited in the range of 5 percent to 10 percent of the object diameter. The causal factor is the limited number of measurement data obtained. The focus of research on EIT at now is the development of functional applications. The novel application developed in this research is to detect bone fractures, mainly due to sports injuries. The hardware characteristics are certainly different from other applications. Optimization of the injection current to match the most resistive characteristics of bone compared to all human body tissues has been carried out. The image of bone is reconstructed using the adjacent method of data collection and the Newton-Raphson iterative algorithm with Tikhonov regularization. The optimization results are seen from the high quality and contrast of the reconstructed image for various injection current values. The current injection frequency is selected at 10 kHz. In the results of this research, the injection current that can produce the highest quality and contrast is 0.3 mA.

Bone fracture detection using electrical impedance tomography based on STEMlab Red Pitaya

“…When reconstructing 3D-printed normal or fractured bone phantom using water reference data, both exhibit the same conductivity range, indicated by blue Figures 9(a Based on the results of the image reconstruction carried out, it can be seen that the EIT built in this study was capable of detecting differences between 3D printing of normal bone and fractures using a frequency of 10 kHz. This result was from the previous study, which also used a frequency of 10 kHz [27]. Apart from that, when the 3D printing of normal bones was reconstructed with the 3D printing of fractured bones, it appeared that there was only part of the fracture.…”