ArticleMagnetic resonance in medicine2021
Real-time device tracking under MRI using an acousto-optic active marker.
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 7 papers.
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Who cites it
7 citing papers in PubMed, 14 citations in OpenAlex.
- Liver fat quantification at 0.55 T enabled by locally low-rank enforced deep learning reconstruction.Magnetic resonance in medicine · 2026Article
- Antenna-Driven Optical Fiber-Based Acousto-Optic Modulation Devices: Electro-Mechanical Model and Experimental Validation.Sensors and actuators. A, Physical · 2025Article
- A Review of Recent Advancements in Sensor-Integrated Medical Tools.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2024Review
- Acousto-optic-based time domain electric field sensor for magnetic resonance imaging applications.Optical engineering (Redondo Beach, Calif.) · 2024Article
- 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
- A 20-gauge active needle design with thin-film printed circuitry for interventional MRI at 0.55T.Magnetic resonance in medicine · 2021Article
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Authors and funding
8 authors at 3 institutions in 2 countries.
Funding
Abstract
purposeThis work aims to demonstrate the use of an "active" acousto-optic marker with enhanced visibility and reduced radiofrequency (RF) -induced heating for interventional MRI.
methodsThe acousto-optic marker was fabricated using bulk piezoelectric crystal and π-phase shifted fiber Bragg grating (FBGs) and coupled to a distal receiver coil on an 8F catheter. The received MR signal is transmitted over an optical fiber to mitigate RF-induced heating. A photodetector converts the optical signal into electrical signal, which is used as the input signal to the MRI receiver plug. Acousto-optic markers were characterized in phantom studies. RF-induced heating risk was evaluated according to ASTM 2182 standard. In vivo real-time tracking capability was tested in an animal model under a 0.55T scanner.
resultsSignal-to-noise ratio (SNR) levels suitable for real-time tracking were obtained by using high sensitivity FBG and piezoelectric transducer with resonance matched to Larmor frequency. Single and multiple marker coils integrated to 8F catheters were readout for position and orientation tracking by a single acousto-optic sensor. RF-induced heating was significantly reduced compared to a coax cable connected reference marker. Real-time distal tip tracking of an active device was demonstrated in an animal model with a standard real-time cardiac MR sequence.
conclusionAcousto-optic markers provide sufficient SNR with a simple structure for real-time device tracking. RF-induced heating is significantly reduced compared to conventional active markers. Also, multiple RF receiver coils connected on an acousto-optic modulator can be used on a single catheter for determining catheter orientation and shape.
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