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Engineering >> 2015, Volume 1, Issue 1 doi: 10.15302/J-ENG-2015018

A Micromotor Catheter for Intravascular Optical Coherence Tomography

1 Department of Biomedical Engineering, Thoraxcenter, Erasmus MC, Rotterdam 3000 DR, the Netherlands
2 Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
3 Department of Imaging Physics and Technology, Delft University of Technology, Delft 2600 AA, the Netherlands

Available online: 2015-03-04

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Abstract

We have developed a new form of intravascular optical coherence tomography (IV-OCT) that allows the extremely fast acquisition of high-resolution images of the coronary arteries. This process leads to much better image quality by eliminating cardiac motion artefacts and undersampling. It relies on a catheter that incorporates a synchronous micromotor with a diameter of 1.0 mm and a rotational speed of up to 5600 revolutions per second, enabling an IV-OCT frame rate of 5.6 kHz. This speed is matched by a wavelength-swept laser that generates up to 2.8 million image lines per second. With this setup, our team achieved IV-OCT imaging of up to 5600 frames per second (fps) in vitro and 4000 fps in vivo, deployed at a 100 mm·s−1 pullback velocity. The imaging session is triggered by the electrocardiogram of the subject, and can scan a coronary artery in the phase of the heartbeat where the heart is at rest, providing a name for this new technology: the "Heartbeat OCT."

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References

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