Fiber motion-insensitive fiber-based polarization-sensitive optical coherence tomography for optic axis determination

2020 ◽  
Vol 37 (3) ◽  
pp. 608
Author(s):  
Zenghai Lu ◽  
Cheng Liu
Keyword(s):  
Optical Coherence Tomography ◽  
Optic Axis ◽  
Optical Coherence ◽  
Fiber Motion

scholarly journals Axial Motion Compensation Of Optical Coherence Tomography With A Collaborative Medical Robot

2021 ◽  
Author(s):  
Robnier Reyes Perez
Keyword(s):  
Optical Coherence Tomography ◽  
Motion Compensation ◽  
Imaging System ◽  
Imaging Modality ◽  
Tumor Resection ◽  
Optic Axis ◽  
Robotic Arm ◽  
Optical Coherence ◽  
Axial Motion ◽  
Oct Imaging

This thesis presents an imaging tool consisting of an Optical Coherence Tomography (OCT) imaging system mounted on a collaborative robotic arm to enable axial motion compensation. Optical Coherence Tomography is a subsurface, high-resolution imaging modality used in neuroimaging to differentiate between pathological and non-pathological tissue. The motivation behind this project is to bring Optical Coherence Tomography to the operating room for neuroimaging to help with cancerous tissue differentiation and maximize the extent of tumor resection. However, neurosurgeons have expressed concern with respect to intracranial pressure (ICP) pulsation displacing the brain far off the optic axis of the imaging system so as to not be visible. The collaborative robotic arm compensates for sample motion along the optic axis using a Proportional controller to track the position of the peak intensity of the sample’s intensity profile, which generally corresponds to the sample surface. Collaborative robots have changed the robot industry paradigm becoming increasingly functional and safer than the previous generations of robotic arms. We present an OCT robot end-effector to test the feasibility of performing OCT imaging with the collaborative robot.

scholarly journals Axial Motion Compensation Of Optical Coherence Tomography With A Collaborative Medical Robot

2021 ◽  
Author(s):  
Robnier Reyes Perez
Keyword(s):  
Optical Coherence Tomography ◽  
Motion Compensation ◽  
Imaging System ◽  
Imaging Modality ◽  
Tumor Resection ◽  
Optic Axis ◽  
Robotic Arm ◽  
Optical Coherence ◽  
Axial Motion ◽  
Oct Imaging

This thesis presents an imaging tool consisting of an Optical Coherence Tomography (OCT) imaging system mounted on a collaborative robotic arm to enable axial motion compensation. Optical Coherence Tomography is a subsurface, high-resolution imaging modality used in neuroimaging to differentiate between pathological and non-pathological tissue. The motivation behind this project is to bring Optical Coherence Tomography to the operating room for neuroimaging to help with cancerous tissue differentiation and maximize the extent of tumor resection. However, neurosurgeons have expressed concern with respect to intracranial pressure (ICP) pulsation displacing the brain far off the optic axis of the imaging system so as to not be visible. The collaborative robotic arm compensates for sample motion along the optic axis using a Proportional controller to track the position of the peak intensity of the sample’s intensity profile, which generally corresponds to the sample surface. Collaborative robots have changed the robot industry paradigm becoming increasingly functional and safer than the previous generations of robotic arms. We present an OCT robot end-effector to test the feasibility of performing OCT imaging with the collaborative robot.

scholarly journals Optic axis mapping with catheter-based polarization-sensitive optical coherence tomography

Optica ◽  
2018 ◽  
Vol 5 (10) ◽  
pp. 1329 ◽  
Author(s):  
Martin Villiger ◽  
Boy Braaf ◽  
Norman Lippok ◽  
Kenichiro Otsuka ◽  
Seemantini K. Nadkarni ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optic Axis ◽  
Optical Coherence

scholarly journals Robust reconstruction of local optic axis orientation with fiber-based polarization-sensitive optical coherence tomography

2018 ◽  
Vol 9 (11) ◽  
pp. 5437 ◽  
Author(s):  
Qingyun Li ◽  
Karol Karnowski ◽  
Peter B. Noble ◽  
Alvenia Cairncross ◽  
Alan James ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optic Axis ◽  
Optical Coherence ◽  
Axis Orientation

scholarly journals Polarization-sensitive optical coherence tomography as a tool to visualize the fiber direction of retinal nerves and peripapillary sclera

2020 ◽  
Vol 238 ◽  
pp. 04003
Author(s):  
Joy Willemse ◽  
Frank Verbraak ◽  
Johannes de Boer
Keyword(s):  
Optical Coherence Tomography ◽  
Optic Nerve ◽  
Healthy Volunteers ◽  
Optic Nerve Head ◽  
Nerve Fibers ◽  
Optic Axis ◽  
Fiber Direction ◽  
Optical Coherence ◽  
Fiber Layer ◽  
Axis Orientation

Polarization sensitive optical coherence tomography (PS-OCT) has been used to visualize the orientation of the nerves in the retinal nerve fiber layer (RNFL) and to visualize the orientation of the collagen fibers in peripapillary sclera in retinas of healthy volunteers. Optic axis orientation images clearly visualize the nerve fibers leaving the optic nerve head (ONH) in all radial directions. Sclera orientation images show that the sclera consist of two layers, an inner layer with an orientation parallel to the RNFL orientation, and a deeper layer where the collagen is circularly oriented.

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