Keywords: MR-Guided Interventions, MR-Guided Interventions
Motivation: Simultaneous ultrasound (U/S) and MR imaging has been reported on whole-body MRI systems with conventional gradients (CVG) but remains unexplored on high-performance gradient (HPG) platforms.
Goal(s): We assessed the MR and U/S image quality, alongside thermal impact on an MR-compatible U/S probe at CVG and HPG configurations.
Approach: Fast spoiled gradient echo imaging, echo planar imaging (EPI), B0-field map and U/S probe temperature were measured.
Results: Moderate-to-severe susceptibility-induced signal loss (due to U/S probe) extended ~8 mm into phantom at gradient isocenter with no visible U/S image artifacts. A substantial temperature rise was observed on U/S probe during EPI at HPG configuration.
Impact: This study evaluates and compares image quality and thermal risks of simultaneous MR and U/S imaging on a high-performance gradient system versus a conventional clinical system. Our findings can help optimize the protocols for image-guided U/S intervention using high-performance gradients.
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