Optical rotary junction incorporating a hollow shaft DC motor for high-speed catheter-based optical coherence tomography

In intravascular optical coherence tomography (OCT), the optical rotary junction plays an important role in rotating and pulling back the catheter to generate cross-sectional coronary artery images. To meet the requirements of high-speed intravascular OCT in a clinical setting, the rotary junction s...

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Bibliographic Details
Published in:Optics letters 2020-01, Vol.45 (2), p.487
Main Authors: Durrani, Abdullah, Javaid, Ammar, Lee, Seungwan, Ha, Jinyong
Format: Article
Language:English
Subjects:
Catheters
D C motors
Electric motors
High speed
Optical Coherence Tomography
Product design
Servomotors
Tomography
Torque
Transmission loss
Vibration measurement
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Summary:In intravascular optical coherence tomography (OCT), the optical rotary junction plays an important role in rotating and pulling back the catheter to generate cross-sectional coronary artery images. To meet the requirements of high-speed intravascular OCT in a clinical setting, the rotary junction should generate high torque and low vibration. In this Letter, we demonstrate an ultrahigh speed optical rotary junction incorporating a hollow shaft brushless DC servomotor to remove a pulley belt, or a gear to minimize vibration noise and transfer stable torque. To evaluate the performance of the rotary junction, the vibration noise and variation of rotation were measured as a function of motor speed. The results showed that the rotary junction rotated the catheter at 42,000 revolutions per minute, with an optical transmission loss of 1.2 dB. To assess the feasibility of the rotary junction for high-speed catheter-based OCT, OCT imaging of the cylindrical shape of a phantom made by two overlapped plastic straws was performed at a rate of 200 frames/s.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.382773