Intraluminal MRI Probe Using Small Size Variable Capacitor

Tadao Matsunaga, Yuichiro Matsuoka, Masayoshi Nakazono, Kagayaki Kuroda, Masayoshi Esashi, Yoichi Haga

Research output: Contribution to journalArticlepeer-review


An intraluminal magnetic resonance imaging (MRI) probe holds promise to achieve a higher resolution image of a small pathological lesion than conventional external probes. Such an intraluminal probe requires precise resonant frequency tuning to 63.865 MHz and impedance matching to 50 Ω, if used for instance in a 1.5-T scanner. Tuning and matching have to be performed after inserted into the subject body as electric permittivity varies according to the tissue location. Thus, in this study, a novel intraluminal MRI probe, which can be tuned and matched remotely by voltage-controlled, MOSFET-type variable capacitors was developed and fabricated. The imaging capability and signal-to-noise ratio (SNR) was evaluated in an agar phantom.

Original languageEnglish
Pages (from-to)29-38
Number of pages10
JournalElectronics and Communications in Japan
Issue number3
Publication statusPublished - 2017 Mar 1


  • MRI, nonplaner photofabrication
  • intraluminal MRI probe
  • minimally invasive therapy
  • receive coil
  • variable capacitor


Dive into the research topics of 'Intraluminal MRI Probe Using Small Size Variable Capacitor'. Together they form a unique fingerprint.

Cite this