Design and implementation of a high frequency electrical impedance tomography system

TLDR

Electrical impedance tomography is an imaging modality being investigated for breast cancer detection, and higher frequencies than typically employed may improve detection, but high‑frequency designs are difficult and require careful system architecture to achieve broadband performance above 1 MHz. This work discusses the design and initial implementation of a 10 MHz bandwidth system. The system employs a digital signal processor for control, signal generation, and processing, with software design and preliminary specifications covering signal generation and detection.

Abstract

Electrical impedance tomography is an imaging modality being investigated for use in detection of breast cancer. Use of higher frequencies than have typically been employed may benefit the detection processes. In this current work we discuss the design and initial implementation of a system having a bandwidth of 10 MHz. Previous investigations into high frequency designs have proven more difficult than anticipated and shown that careful selection of systems architecture is critical to achieving broadband performance above 1 MHz. The design for this new system is based on a digital signal processor (DSP) which is used for control, signal generation and signal processing. Signal generation and detection, software design and preliminary system specifications are discussed.