Keywords: Interventional Devices, Interventional Devices, Pulse sequence design
Motivation: MR-guided percutaneous interventions at closed-bore high-field systems profit from remote device manipulation with real-time needle tracking.
Goal(s): To integrate a sequence capable of acquiring two T2-weighted orthogonal slices simultaneously (Ortho-SSFP-Echo) into the device-assisted needle intervention workflow during needle insertion.
Approach: The assistance system (GantryMate) was coupled with a real-time POCC sequence to target a lesion. Once the lesion was identified, its position information was used in a real-time Ortho-SSFP-Echo acquisition to dynamically monitor the needle insertion.
Results: The Ortho-SSFP-Echo sequence enables simultaneous needle visualization in two planes, offering higher CNR than GRE and comparable to bSSFP, without banding artifacts.
Impact: Combining an Ortho-SSFP-Echo sequence with a compact needle assistance system provides a streamlined interventional workflow with decreased complexity and improved image contrast for MR-guided percutaneous interventions at high field.
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