title: Sensitive enhancement of vessel wall imaging with an endoesophageal Wireless Amplified NMR Detector (WAND).
abstract: To improve the imaging quality of vessel walls with an endoesophageal Wireless Amplified NMR Detector (WAND).
  
  
  
  A cylindrically shaped double-frequency resonator has been constructed with a single metal wire that is self-connected by a pair of nonlinear capacitors. The double-frequency resonator can convert wirelessly provided pumping power into amplified MR signals. This compact design makes the detector easily insertable into a rodent esophagus.
  
  
  
  The detector has good longitudinal and axial symmetry. Compared to an external surface coil, the WAND can enhance detection sensitivity by at least 5 times, even when the distance separation between the region of interest and the detector's cylindrical surface is twice the detector's own radius. Such detection capability enables us to observe vessel walls near the aortic arch and carotid bifurcation with elevated sensitivity.
  
  
  
  A cylindrical MRI detector integrated with a wireless-powered amplifier has been developed as an endoesophageal detector to enhance detection sensitivity of vessel walls. This detector can greatly improve the imaging quality for vessel regions that are susceptible to atherosclerotic lesions. Magn Reson Med 78:2048-2054, 2017. © 2016 International Society for Magnetic Resonance in Medicine.
authors.affiliation: Department of Radiology, Guizhou Provincial People's Hospital, Guiyang, China.|Department of Radiology, Michigan State University, East Lansing, Michigan, USA.
authors.forename: Xianchun
authors.initials: X
authors.lastname: Zeng
authors.affiliation: Applied Physics and Instrumentation Group, Howard Huge Medical Institute, Janelia Research Campus, Ashburn, Virginia, USA.
authors.forename: Mladen
authors.initials: M
authors.lastname: Barbic
authors.affiliation: Department of Radiology, Michigan State University, East Lansing, Michigan, USA.
authors.forename: Liangliang
authors.initials: L
authors.lastname: Chen
authors.affiliation: Department of Radiology, Michigan State University, East Lansing, Michigan, USA.
authors.forename: Chunqi
authors.initials: C
authors.lastname: Qian
mesh_terms: D000818:Animals; D001013:Aorta, Thoracic / Q000000981:diagnostic imaging; D002339:Carotid Arteries / Q000000981:diagnostic imaging; D004867:Equipment Design; D004947:Esophagus / Q000000981:diagnostic imaging*; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation* / Q000379:methods*; D019047:Phantoms, Imaging; D051381:Rats; D059015:Wireless Technology / Q000295:instrumentation*
keywords: cylindrical endoesophageal detector; wireless amplifier