Localization grid for MR-guided biopsy.

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Interventional Radiology

Background:

• Magnetic resonance (MR)-guided procedures require precise localization.
• Existing localization methods may have limitations in accuracy or accessibility.
• Gadolinium-based contrast agents are commonly used in MR imaging.

Purpose of the Study:

• To design and evaluate a novel localization grid for MR-guided biopsies.
• To determine optimal concentrations of Gd-DTPA for signal intensity.
• To assess the effectiveness of the grid for biopsy and fluid aspiration.

Main Methods:

• Evaluated signal intensities of various Gd-DTPA concentrations in polyethylene tubes.
• Tested different tube sizes and MR pulse sequences.
• Constructed a localization grid using optimal Gd-DTPA concentration and tube dimensions.

Main Results:

• Optimal signal intensity for Gd-DTPA was achieved at a 500 microM concentration across all pulse sequences.
• A 5-mm-diameter polyethylene tube grid filled with 500-microM Gd-DTPA was successfully created.
• The developed grid demonstrated excellent localization capabilities.

Conclusions:

• The designed Gd-DTPA localization grid is effective for MR-guided biopsies.
• This tool improves precision in MR-guided interventions.
• The grid facilitates accurate fluid aspiration under MR guidance.