Patient-Specific 3D-Printed and Bolus Material-Based Localization Grids for MRI-Guided Interventional Procedures

Abstract

In view of the lack of commercially available localization grids for MRI-guided interventional procedures, two customizable and easily fabricable grids are proposed. The first one is a patient-specific 3D-printed localization grid that incorporates MRI markers, while the second one is a grid constructed with Superflex Transparent Bolus material. MRI scans were performed with the grids attached on an abdominal phantom. The patient-specific 3D printed grid is visible in T1-weighted, T2-weighted, proton density (PD) and FLAIR MR images, whereas the Superflex grid is visible only in T1-weighted and PD images. However, the Superflex grid offers the advantage of a simpler fabrication process and being more cost-effective. Both proposed localization grids can facilitate the determination of the optimal needle entry positions for MRI-guided interventional procedures, leading to reduced overall procedure time and improved efficiency.