IEEE Transactions on Biomedical Engineering

Featured Articles
Design of Ceramic Packages for Ultrasonically Coupled Implantable Medical Devices
Ultrasonic power transfer has emerged as an efficient method for powering and communicating with small and deeply implanted medical devices. However, most work utilizing ultrasonically-coupled implants relies on non-hermetic polymeric encapsulation materials rather than conventional metal or ceramic packaging materials due to the inherent acoustic impedance mismatch of metals and ceramics. Here, we develop models of ultrasonic power transfer through metals, examining flexural and bulk mode propagation, to determine optimal package design for ultrasonic power transfer. We utilize these results to build millimeter-scale hybrid ceramic/metal packages, and perform benchtop demonstrations of ultrasonic powering and communication with a packaged electrophysiology sensor... Read more
Featured Articles
Evaluation of Secrecy Capacity for Next-Generation Leadless Cardiac Pacemakers
Cardiac pacemakers are implanted medical devices designed to regulate abnormal cardiac rhythms. In the case of traditional pacemakers, the leads are considered to be the weakest link. This study proposes the keyless physical layer security (PLS) method to provide information confidentiality for next-generation leadless cardiac pacemakers. Electromagnetic simulations and experimental measurements were performed to prove the hypothesis of the availability of positive secrecy capacity in the near proximity of the human body. The research also evaluates the insecure volume in three-dimensional space around the body representing all the eavesdropper positions from which the pacemaker can be eavesdropped... Read more
Articles, Published Articles
Tissue Variability and Antennas for Power Transfer to Wireless Implantable Medical Devices
   The design of effective transcutaneous systems demands the consideration of inevitable variations in tissue characteristics, which vary across body areas, among individuals, and over time. The purpose of this paper was to design and evaluate several printed antenna topologies for... Read more