title: A Wireless Fully Passive Neural Recording Device for Unobtrusive Neuropotential Monitoring.
abstract: OBJECTIVE
  We propose a novel wireless fully passive neural recording device for unobtrusive neuropotential monitoring. Previous work demonstrated the feasibility of monitoring emulated brain signals in a wireless fully passive manner. In this paper, we propose a novel realistic recorder that is significantly smaller and much more sensitive.
  
  
  METHODS
  The proposed recorder utilizes a highly efficient microwave backscattering method and operates without any formal power supply or regulating elements. Also, no intracranial wires or cables are required. In-vitro testing is performed inside a four-layer head phantom (skin, bone, gray matter, and white matter).
  
  
  RESULTS
  Compared to our former implementation, the neural recorder proposed in this study has the following improved features: 1) 59% smaller footprint, 2) up to 20-dB improvement in neuropotential detection sensitivity, and 3) encapsulation in biocompatible polymer.
  
  
  CONCLUSIONS
  For the first time, temporal emulated neuropotentials as low as 63 μVpp can be detected in a wireless fully passive manner. Remarkably, the high-sensitivity achieved in this study implies reading of most neural signals generated by the human brain.
  
  
  CONCLUSIONS
  The proposed recorder brings forward transformational possibilities in wireless fully passive neural detection for a very wide range of applications (e.g., epilepsy, Alzheimer's, mental disorders, etc.).
authors.forename: Asimina
authors.initials: A
authors.lastname: Kiourti
authors.forename: Cedric W L
authors.initials: CW
authors.lastname: Lee
authors.forename: Junseok
authors.initials: J
authors.lastname: Chae
authors.forename: John L
authors.initials: JL
authors.lastname: Volakis
mesh_terms: D006801:Humans; D008904:Miniaturization; D064926:Neurophysiological Monitoring / Q000295:instrumentation*; D019047:Phantoms, Imaging; D011474:Prosthesis Design; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013686:Telemetry / Q000295:instrumentation*; D059015:Wireless Technology / Q000295:instrumentation*