1. Articles from Robert Beurskens

    1-4 of 4
    1. Motorized capsule for shadow-free OCT imaging and synchronous beam control

      Motorized capsule for shadow-free OCT imaging and synchronous beam control

      We demonstrate a tethered motorized capsule for unobstructed optical coherence tomography (OCT) imaging of the esophagus. By using a distal reflector design, we avoided the common shadow artifact induced by the motor wires. A synchronous driving technique features three types of beam-scanning modes of the capsule, i.e., circumferential beam scanning, localized beam scanning, and accurate beam positioning. We characterized these three modes and carried out ex vivo imaging experiments using the capsule. The results show that the capsule can potentially be a useful tool for diagnostic OCT imaging and OCT-guided biopsy and therapy of the esophagus.

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    2. Feature Of The Week 6/30/13: Ultrafast Intravascular Optical Coherence Tomography Imaging

      Feature Of The Week 6/30/13: Ultrafast Intravascular Optical Coherence Tomography Imaging

      The fastest commercial intravascular optical coherence tomography (OCT) systems acquire 160 frames/second with 500 lines/frame, and the pullback speed is limited to 40 mm∕s. In this situation, the images are under sampled in the pullback direction: Only 12% of the lumen is sampled because the sampling interval of 250 μm is much larger than the transverse resolution, which is approximately 30 μm. In clinical situations, the cardiac motion also affects the OCT acquisition. The pullback procedure for the whole artery takes several seconds. The cardiac motion during acquisition will cause inaccuracy in frame spacing and possibly frame ...

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    3. Ultrahigh-speed intravascular optical coherence tomography imaging at 3200 frames per second

      Ultrahigh-speed intravascular optical coherence tomography imaging at 3200 frames per second

      We demonstrated intravascular OCT imaging with frame rate up to 3.2 kHz (192,000 rpm scanning). This was achieved by using a custom-built catheter in which the circumferential scanning was actuated by a 1.0 mm diameter synchronous motor. The OCT system was based on a Fourier Domain Mode Locked laser operating at an A-line rate of 1.6 MHz. The diameter of the catheter was 1.1 mm at the tip. Ex vivo images of human coronary artery (~78.4 mm length) were acquired at a pullback speed of 100 mm/s. True 3D volumetric imaging of the ...

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    4. Intravascular optical coherence tomography imaging at 3200 frames per second

      Intravascular optical coherence tomography imaging at 3200 frames per second

      We demonstrate intravascular optical coherence tomography (OCT) imaging with frame rate up to 3.2 kHz (192,000 rpm scanning). This was achieved by using a custom-built catheter in which the circumferential scanning was actuated by a 1.0 mm diameter synchronous motor. The OCT system, with an imaging depth of 3.7 mm (in air), is based on a Fourier domain mode locked laser operating at an A-line rate of 1.6 MHz. The diameter of the catheter is 1.1 mm at the tip. Ex vivo images of human coronary artery (78.4 mm length) were acquired at ...

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    1-4 of 4
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  2. Topics in the News

    1. (4 articles) Robert A. Huber
    2. (4 articles) Gijs van Soest
    3. (4 articles) Tianshi Wang
    4. (4 articles) Geert Springeling
    5. (4 articles) Anton F. W. van der Steen
    6. (3 articles) Ludwig Maximilian University of Munich
    7. (3 articles) Tom Pfeiffer
    8. (3 articles) Wolfgang Wieser
    9. (2 articles) Erasmus University
    10. (1 articles) University Medical Center Utrecht
    11. (1 articles) University of Lübeck
    12. (1 articles) University of Western Australia
    13. (1 articles) Erasmus University
    14. (1 articles) Robert A. Huber
    15. (1 articles) Gijs van Soest
    16. (1 articles) Fred K. Chen
    17. (1 articles) Corrado Tamburino
    18. (1 articles) Anton F. W. van der Steen
    19. (1 articles) Joost Daemen
    20. (1 articles) Wolfgang Wieser
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    Intravascular optical coherence tomography imaging at 3200 frames per second Ultrahigh-speed intravascular optical coherence tomography imaging at 3200 frames per second Feature Of The Week 6/30/13: Ultrafast Intravascular Optical Coherence Tomography Imaging Motorized capsule for shadow-free OCT imaging and synchronous beam control Intravitreal Ranibizumab Monotherapy or Combined with Laser for Diabetic Macular Edema (OCT guided study) Prospective evaluation of drug eluting self‐apposing stent for the treatment of unprotected left main coronary artery disease: 1‐year results of the TRUNC study Clinical validation of the RTVue optical coherence tomography angiography image quality indicators Intraoperative OCT-Assisted Retinal Detachment Repair in the DISCOVER Study: Impact and Outcomes Analysis of Retinal Vascular Density using Optical Coherence Tomography Angiography, to Differentiate Healthy, Glaucoma Suspect and Glaucomatous Eyes (Thesis) Correlation between in vivo near-infrared spectroscopy and optical coherence tomography detected lipid-rich plaques with post-mortem histology Simultaneous morphological and flow imaging enabled by megahertz intravascular Doppler optical coherence tomography Ultrastructural analysis of a corneal dellen using optical coherence tomography