Auricular Acupressure and MRI Safety: Evaluation of Titanium-Based Auricular Beads for Potential Harm and Imaging Artifact in a Phantom Model and Human Volunteer

Abstract Background Auricular acupressure, rooted in traditional Chinese medicine, uses small seeds or metallic beads applied to specific ear acupoints to manage physical and mental health symptoms. It is being used increasingly in oncology and palliative care for relief of pain, nausea, and anxiety. However, its safety during magnetic resonance imaging (MRI) remains unclear due to concerns about potential overheating and image artifact from the metallic beads. Titanium-based beads are commonly used but their MRI compatibility has not been systematically evaluated. In this study, we aimed to quantify potential harm and assess MRI artifacts caused by titanium-based auricular beads, hypothesizing minimal risk and negligible impact on image quality. Methods Titanium auricular beads were tested in a phantom model and on a human volunteer to assess safety and image artifact at 3 tesla (T) and 7T MRI. Standard methodology was used to evaluate radiofrequency-induced heating and magnetic forces. An experienced radiologist interpreted the imaging studies to assess the extent of the artifact caused by the beads. Results No radiofrequency-induced heating or magnetic forces were observed at either field strength. Image artifact was minimal and did not interfere with diagnostic interpretation. These findings suggest that the titanium beads tested pose negligible risk and have minimal impact on image quality. However, the clinicians should remain aware of bead composition and screen for nontitanium materials to ensure patient safety and preserve image quality for patients undergoing MRI. Trial Registration : N/A. Graphical abstract