Automated Robotic Surface Scanning With Optical Coherence Tomography

Sprenger, Johanna; Saathoff, Thore; Schlaefer, Alexander

doi:10.1109/isbi48211.2021.9433772

Cited by 7 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Within 20 minutes, a total FOV of 113.9 × 33.8 mm 2 was covered resulting in an imaging speed of 0.032 cm 2 /s. Sprenger et al introduced a system that relies solely on the data obtained by the OCT without any supplementary spatial information [ 35 ]. To align the OCT probe with the surface, a low-resolution OCT scan was performed initially at each position to determine the sample’s surface position.…”

Section: Introductionmentioning

confidence: 99%

Large area robotically assisted optical coherence tomography (LARA-OCT)

Lotz,

Göb,

Böttger

et al. 2024

Biomed. Opt. Express

View full text Add to dashboard Cite

We demonstrate large-area robotically assisted optical coherence tomography (LARA-OCT), utilizing a seven-degree-of-freedom robotic arm in conjunction with a 3.3 MHz swept-source OCT to raster scan samples of arbitrary shape. By combining multiple fields of view (FOV), LARA-OCT can probe a much larger area than conventional OCT. Also, nonplanar and curved surfaces like skin on arms and legs can be probed. The lenses in the LARA-OCT scanner with their normal FOV can have fewer aberrations and less complex optics compared to a single wide field design. This may be especially critical for high resolution scans. We directly use our fast MHz-OCT for tracking and stitching, making additional machine vision systems like cameras, positioning, tracking or navigation devices obsolete. This also eliminates the need for complex coordinate system registration between OCT and the machine vision system. We implemented a real time probe-to-surface control that maintains the probe alignment orthogonal to the sample by only using surface information from the OCT images. We present OCT data sets with volume sizes of 140 × 170 × 20 mm3, captured in 2.5 minutes.

show abstract

Section: Introductionmentioning

confidence: 99%

Large area robotically assisted optical coherence tomography (LARA-OCT)

Lotz,

Göb,

Böttger

et al. 2024

Biomed. Opt. Express

View full text Add to dashboard Cite

show abstract

“…Even though our proposed application seems less complicated and requires fewer safety regulations than ophthalmic imaging, skin imaging is especially challenging because large 3D datasets with file sizes beyond 1 TB and various shapes need to be acquired. In contrast to previous approaches for automatic large area scanning [4][5][6][7], we developed an intrinsic, online probe-to-surface control for probe positioning and orientation while OCT imaging at real-time update rates. It features a combined surfacedistance and surface-orientation closed-loop control algorithm, which enables automatic positioning of the probe solely based on the spatial surface information extracted from the acquired OCT image.…”

Section: Introductionmentioning

confidence: 99%

Large area robotically assisted optical coherence tomography (LARA-OCT) for skin imaging with MHz-OCT surface tracking

Göb¹,

Lotz²,

Ha-Wissel³

et al. 2023

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII

View full text Add to dashboard Cite

Optical coherence tomography (OCT) is a powerful imaging technique to non-invasively differentiate between healthy skin and pathological conditions. Unfortunately, commercially available OCT-systems are typically slow and not capable of scanning large areas at reasonable speed. Since skin lesions may extend over several square centimeters, potential inflammatory infiltrates remain undetected. Here, we present large area robotically assisted OCT (LARA-OCT) for skin imaging. Therefor a collaborative robot is combined with an existing, home-built 3.3 MHz-OCT-system and for surface tracking an online probe-to-surface control is implemented which is solely based on the OCT surface signal. It features a combined surface-distance and surface-orientation closed-loop control algorithm, which enables automatic positioning and alignment of the probe across the target while imaging. This allows to acquire coherent OCT images of skin areas beyond 10 cm².

show abstract

“…Compared to ophthalmic imaging, our skin imaging application poses the challenge that large 3D datasets with file sizes beyond 1 TB and various shapes are to be acquired. In contrast to previous approaches for automatic large area scanning [3][4][5], we developed an intrinsic ODC-based, online probe-to-surface control for probe positioning and orientation while OCT imaging at real-time update rates. Using mosaic pattern acquisition and subsequent stitching, we previously demonstrated initial in vivo OCT skin images beyond 10 cm² (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Advances in large area robotically assisted OCT (LARA-OCT): towards drive-by continuous motion imaging

Göb,

Lotz,

Ha-Wissel

et al. 2023

Optical Coherence Imaging Techniques and Imaging in Scattering Media V

View full text Add to dashboard Cite

Optical coherence tomography is a powerful imaging technique to visualize and localize depth-dependent tissue structure to differentiate between healthy and pathological conditions. However, conventional OCT systems are only capable of detecting small areas. To overcome this limitation, we have developed a large area robotically assisted OCT (LARA-OCT) system for automatic acquisition of large OCT images. Using mosaic pattern acquisition and subsequent stitching, we previously demonstrated initial in vivo OCT skin images beyond 10 cm². To improve acquisition speed and reduce dead times, we here demonstrate and analyze LARA-OCT with a new drive-by continuous motion imaging protocol.

show abstract

Automated Robotic Surface Scanning With Optical Coherence Tomography

Cited by 7 publications

References 10 publications

Large area robotically assisted optical coherence tomography (LARA-OCT)

Large area robotically assisted optical coherence tomography (LARA-OCT)

Large area robotically assisted optical coherence tomography (LARA-OCT) for skin imaging with MHz-OCT surface tracking

Advances in large area robotically assisted OCT (LARA-OCT): towards drive-by continuous motion imaging

Contact Info

Product

Resources

About