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Related Experiment Video

Updated: Jul 17, 2026

Noninvasive In Vivo Small Animal MRI and MRS: Basic Experimental Procedures

Noninvasive In Vivo Small Animal MRI and MRS: Basic Experimental Procedures

Published on: October 20, 2009

A Novel open-ended intravascular MRI loop probe.

M Mohammadzadeh¹, M Shahabadi, H Soltanian-Zadeh

¹Dept. of Phys., Amirkabir Univ., 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

Researchers developed a novel, miniaturized intravascular catheter probe for improved coronary artery MRI. This new probe enhances signal-to-noise ratio (SNR) and allows for external tuning circuits, overcoming limitations of current technologies.

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

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Last Updated: Jul 17, 2026

Noninvasive In Vivo Small Animal MRI and MRS: Basic Experimental Procedures

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

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

Published on: April 4, 2013

Area of Science:

Medical Imaging
Biomedical Engineering
Cardiovascular Technology

Background:

Intravascular catheter probes enhance Signal-to-Noise Ratio (SNR) for coronary artery Magnetic Resonance (MR) imaging.
Miniaturization of these probes is crucial for imaging small arteries, but noise from connecting cables can degrade performance.
Current designs require tuning and matching circuits near the probe, limiting size and flexibility.

Purpose of the Study:

To develop a novel, miniaturized intravascular catheter probe for enhanced MR imaging of coronary arteries.
To overcome the limitations of conventional loop probes regarding size, flexibility, and SNR.

Main Methods:

A novel open-ended loop probe operating at 64 MHz was designed.
The probe features a short, 4 cm bare length and a 20 Ohm input impedance.
This design allows for external placement of matching and tuning circuits.

Main Results:

The proposed probe enables external placement of matching and tuning circuits, outside the patient's vasculature.
The novel probe demonstrates superior signal level compared to conventional loop antennas.
Improved signal uniformity was observed with the new probe design.

Conclusions:

The novel open-ended loop probe offers significant advantages for intravascular MR imaging.
This technology facilitates greater miniaturization and flexibility of catheter probes for coronary artery imaging.
The probe design enhances SNR and signal uniformity, crucial for high-quality cardiovascular MR imaging.