ArticleMagnetic resonance in medicine2021
A 20-gauge active needle design with thin-film printed circuitry for interventional MRI at 0.55T.
Article in Magnetic resonance in medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Flexible, multimodal, electrical-sensing-optical-transmission μfiber-sensors via an on-fiber printed electronics strategy.National science review · 2026Article
- Interventional device tracking under MRI via alternating current controlled inhomogeneities.Magnetic resonance in medicine · 2024Article
- Cardiac MRI at Low Field Strengths.Journal of magnetic resonance imaging : JMRI · 2024Review
- EDEN (Electrocardiographic Radial Depth Navigation): A Novel Approach to Navigate Inside Heart Muscle.JACC. Clinical electrophysiology · 2023Article
- Tackling SNR at low-field: a review of hardware approaches for point-of-care systems.Magma (New York, N.Y.) · 2023Review
- An interventional MRI guidewire combining profile and tip conspicuity for catheterization at 0.55T.Magnetic resonance in medicine · 2023Article
- MRI-guided endovascular intervention: current methods and future potential.Expert review of medical devices · 2022Review
- Minimal artifact actively shimmed metallic needles in MRI.Magnetic resonance in medicine · 2022Article
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Authors and funding
10 authors.
Funding
Abstract
purposeThis work aims to fabricate RF antenna components on metallic needle surfaces using biocompatible polyester tubing and conductive ink to develop an active interventional MRI needle for clinical use at 0.55 Tesla.
methodsA custom computer numeric control-based conductive ink printing method was developed. Based on electromagnetic simulation results, thin-film RF antennas were printed with conductive ink and used to fabricate a medical grade, 20-gauge (0.87 mm outer diameter), 90-mm long active interventional MRI needle. The MRI visibility performance of the active needle prototype was tested in vitro in 1 gel phantom and in vivo in 1 swine. A nearly identical active needle constructed using a 44 American Wire Gauge insulated copper wire-wound RF receiver antenna was a comparator. The RF-induced heating risk was evaluated in a gel phantom per American Society for Testing and Materials (ASTM) 2182-19.
resultsThe active needle prototype with printed RF antenna was clearly visible both in vitro and in vivo under MRI. The maximum RF-induced temperature rise of prototypes with printed RF antenna and insulated copper wire antenna after a 3.96 W/kg, 15 min. long scan were 1.64°C and 8.21°C, respectively. The increase in needle diameter was 98 µm and 264 µm for prototypes with printed RF antenna and copper wire-wound antenna, respectively.
conclusionThe active needle prototype with conductive ink printed antenna provides distinct device visibility under MRI. Variations on the needle surface are mitigated compared to use of a 44 American Wire Gauge copper wire. RF-induced heating tests support device RF safety under MRI. The proposed method enables fabrication of small diameter active interventional MRI devices having complex geometries, something previously difficult using conventional methods.
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