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Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging

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Novel double-turn loop probe for intravascular MRI.

M Mohammad-Zadeh¹, H Soltanian-Zadeh, M Shah-Abadi

¹Dept. of Phys., Amirkabir Univ. of Technol., Tehran, Iran.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference

|February 3, 2007

Summary

This study introduces a novel two-turn loop probe for intravascular magnetic resonance imaging (MRI). The new design enhances signal-to-noise ratio (SNR) compared to conventional probes, addressing key design challenges.

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Area of Science:

Medical Imaging
Biomedical Engineering
Electrical Engineering

Background:

Designing intravascular loop probes for magnetic resonance imaging (MRI) faces challenges in minimizing size while maximizing signal-to-noise ratio (SNR).
Existing NPO grade captors under 1mm are available, but impedance matching network components limit tunability.

Purpose of the Study:

To propose and evaluate a new loop probe design for intravascular MRI at 1.5 Tesla.
To improve SNR and overcome limitations of conventional loop probes.

Main Methods:

A novel two-turn loop probe design with a gap, placed over a perfused inflatable balloon structure.
Evaluation through series of signal-to-noise ratio (SNR), length, and impedance comparisons with conventional loop probes.

Main Results:

The new probe has a length of 1.1 cm and an impedance of 23.5 OHM (bare case).
The proposed probe demonstrates a greater SNR compared to conventional loop probes.

Conclusions:

The new two-turn loop probe design offers improved performance for intravascular MRI.
This design addresses key challenges in miniaturization and SNR enhancement for intravascular imaging probes.