Dr. Natalia Zulina Profile

Dr. Natalia Zulina

at Vanderbilt Univ

SPIE Involvement:

Author

Publications (2)

SPIE Journal Paper | 19 January 2023 Open Access

Automatic intraluminal scanning with a steerable endoscopic optical coherence tomography catheter for gastroenterology applications

Oscar Caravaca-Mora, Philippe Zanne, Guiqiu Liao, Natalia Zulina, Lucile Heroin, Lucile Zorn, Michel De Mathelin, Benoit Rosa, Florent Nageotte, Michalina Gora

JOM, Vol. 3, Issue 01, 011005, (January 2023) https://doi.org/10.1117/12.10.1117/1.JOM.3.1.011005

KEYWORDS: Optical coherence tomography, Endoscopy, Endoscopes, Robotics, Teleoperation, Optical microsystems, Optical coherence, Imaging systems, Tissues, Equipment

Read Abstract +

SignificanceEndoscopic optical coherence tomography (OCT) enables real-time optical biopsy of human organs. Endoscopic probes require miniaturization of optics, which in turn limits field of view. When larger imaging areas are needed such as in the gastrointestinal tract, the operator must manually scan the probe over the tissue to extend the field of view, often resulting in an imperfect scanning pattern and increased risk of missing lesions. Automatic scanning has the potential to extend the field of view of OCT, allowing the user to focus on image interpretation during real-time observations.AimThis work proposes an automatic scanning using a steerable OCT catheter integrated with a robotized interventional flexible endoscope. The aim is to extend the field of view of a low-profile OCT probe while improving scanning accuracy and maintaining a stable endoscope’s position during minimally invasive treatment of colorectal lesions.ApproachA geometrical model of the steerable OCT catheter was developed for estimating the volume of the accessible workspace. Experimental validation was done using electromagnetic tracking of the catheter’s positions. An exemplary scanning path was then selected within the available workspace to evaluate motion performance with the robotized steerable OCT catheter. Automatic scanning is compared to a teleoperated one and a manual scanning with a nonrobotized flexible endoscope. Spectral arc length, scanning area, spacing between scan trajectories, and time are metrics used to quantify performance.ResultsThe available scanning workspace was experimentally estimated to be 255 cm3. The automatic scanning mode provided the highest accuracy and smoothness of motion with spectral arc length of −3.18, covered area of 10.11 cm2, 1.54 mm spacing between 15 sweep trajectories, maximum translation of 27.99 mm, and time to finish of 3.11s.ConclusionsAutomatic modality improved the accuracy of scanning within a large workspace. The robotic capability provided better control to the user to define spacing resolution of scanning patterns.

DOWNLOAD PAPER

Proceedings Article | 19 July 2019 Paper

Colorectal polyps mimicking phantoms for OCT application

Natalia Zulina, Oscar Caravaca, Sara Gravelyn, Lucile Zorn, Michalina Gora

Proceedings Volume 11073, 110731H (2019) https://doi.org/10.1117/12.2527098

KEYWORDS: Optical coherence tomography, Colon, Imaging systems, Tissue optics, Optical properties, Tissues, Endoscopy, Skin, Silicon, Scattering

Read Abstract +

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years