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Intravascular Magnetic Resonance Imaging Using a Loopless Catheter Antenna
 

Summary: Intravascular Magnetic Resonance Imaging Using a
Loopless Catheter Antenna
Ogan Ocali, Ergin Atalar
Recently,intravascular catheter probes have been developed
to increase signal-to-noise ratio (SNR) for MR imaging of
blood vessels. Miniaturizationof these catheter probes with-
out degrading their performances is very critical in imaging
small vessels such as coronary arteries. Catheter coils have a
loop incorporated in their structure and have limitations in
physicaldimensions and electromagneticproperties.The use
of a loopless intravascularcatheter antenna is proposed to
overcomethese problems. The catheter antennaisessentially
a dipole, which makes a very thin diameter possible, and its
electronic circuitry can be placed outside the blood vessels
without performancedegradation.The theoretical foundation
for the design and operation of the catheter antenna is pre-
sented. Several catheter antennae, as small as 1.5 French,
were constructed and tested on phantoms and rabbits with
great success. The catheter antenna has a simple structure
and is easy to design, implement,and operate.

  

Source: Atalar, Ergin - Department of Electrical and Electronics Engineering, Bilkent University

 

Collections: Engineering; Biology and Medicine