Development of a cone-shape phantom for multi-voxel MR spectroscopy

Area of Science:

• Medical Imaging and Spectroscopy
• Biomedical Engineering

Background:

• Magnetic Resonance Spectroscopy (MRS) is crucial for non-invasive metabolite analysis.
• Developing reliable phantoms is essential for accurate MRS quantification and quality control.

Purpose of the Study:

• To develop and evaluate a novel cone-shape phantom for multi-voxel magnetic resonance spectroscopy (MRS).
• To assess the phantom's utility for metabolite quantification and MR spectra quality control.

Main Methods:

• A cone-shape phantom was constructed using acrylic resin and poly-ethylene cones, filled with various metabolite materials.
• MR imaging and spectroscopy (single voxel spectroscopy - SVS, and multi-voxel spectroscopy - MVS) were performed on 1.5T and 3T systems.
• Metabolite identification and quantification were conducted using the SAGE post-program, with high-order shimming for enhanced resolution.

Main Results:

• The cone-shape phantom demonstrated a proportional relationship between metabolite volume and spectral area/amplitude.
• High-order shimming significantly improved spectral resolution for both SVS and MVS.
• The phantom proved effective for accurate metabolite quantification.

Conclusions:

• The developed cone-shape phantom is a valuable tool for metabolite quantification in MRS.
• This phantom can be utilized for quality control of MR spectra acquired through SVS and MVS techniques.