Novel method to assess the impact of aging and sun exposure on skin morphology by optical coherence tomography

2021 ◽  
Author(s):  
Felix Hilge ◽  
Michael Evers ◽  
Malte Casper ◽  
Joshua Glahn ◽  
Weeranut Phothong ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Sun Exposure ◽  
Optical Coherence ◽  
Novel Method ◽  
Skin Morphology ◽  
The Impact

scholarly journals The role of optical coherence tomography guidance in scaffold versus stent optimization

2020 ◽  
Vol 72 (1) ◽  
Author(s):  
Arif A. Al Nooryani ◽  
Nagwa A. Abdelrahman ◽  
Hatem A. Helmy ◽  
Yehia T. Kishk ◽  
Ayman K. M. Hassan
Keyword(s):  
Decision Making ◽  
Optical Coherence Tomography ◽  
Coronary Intervention ◽  
Drug Eluting Stents ◽  
Optical Coherence ◽  
Total Rate ◽  
Great Ability ◽  
Bioresorbable Scaffolds ◽  
Drug Eluting ◽  
The Impact

Abstract Background Optical coherence tomography showed a great ability to identify adverse features during percutaneous coronary intervention with drug-eluting stents and resulted in better clinical outcomes. The study aimed to assess the impact of optical coherence tomography on intraoperative decision-making during implantation of Absorb bioresorbable scaffolds versus everolimus drug-eluting stents. Results We performed an observational study that included 223 consecutive patients post optical coherence tomography-guided implantation of either Absorb bioresorbable scaffolds (162 patients) or everolimus drug-eluting stents (61 patients). We studied the influence of optical coherence tomography on intraoperative decision-making during implantation of bioresorbable scaffolds versus drug-eluting stents by analyzing the total rate of optical coherence tomography-dependent modifications in each device. After satisfactory angiographic results, the total rate of required intervention for optical coherence tomography detected complications was significantly higher in the bioresorbable scaffolds arm compared to drug-eluting stents arm (47.8% versus 32.9%, respectively; p = 0.019). The additional modifications encompassed further optimization in the case of device underexpansion or struts malapposition, and even stenting in the case of strut fractures, or significant edge dissection. Conclusions Compared to drug-eluting stents, Absord scaffold was associated with a significantly higher rate of optical coherence tomography-identified intraprocedural complications necessitating further modifications. The study provides some hints on the reasons of scaffolds failure in current PCI practice; it offers a new insight for the enhancement of BRS safety and presents and adds to the growing literature for successful BRS utilization.

The Impact of Nd:YAG Capsulotomy on Foveal Thickness Measurement by Optical Coherence Tomography

2010 ◽  
Vol 41 (1) ◽  
pp. 67-71 ◽  
Author(s):  
Ugur E Altiparmak ◽  
Ibrahim Ersoz ◽  
Dicle Hazirolan ◽  
Burcin Koklu ◽  
Remzi Koklu ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Thickness Measurement ◽  
Optical Coherence ◽  
Foveal Thickness ◽  
The Impact

scholarly journals Evaluating Retinal and Choroidal Perfusion Changes After Ocular Massage of Healthy Eyes Using Optical Coherence Tomography Angiography

Medicina ◽  
2020 ◽  
Vol 56 (12) ◽  
pp. 645
Author(s):  
Felix Rommel ◽  
Sabine Lüken ◽  
Michelle Prasuhn ◽  
Maximilian Kurz ◽  
Vinodh Kakkassery ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Treatment Option ◽  
Optical Coherence Tomography Angiography ◽  
Retinal Artery Occlusion ◽  
Artery Occlusion ◽  
Optical Coherence ◽  
Capillary Plexus ◽  
Retinal Artery ◽  
The Impact ◽  
Healthy Eyes

Background and objectives: Ocular massage (OM) is used as a treatment option for acute retinal artery occlusion, under the assumption that it induces vessel dilatation and enhances perfusion. Since evidence of ocular perfusion alteration due to OM is lacking, we investigate the impact of OM on the hemodynamics of the posterior pole in healthy eyes in a noninvasive fashion by using optical coherence tomography angiography (OCTA). Materials and Methods: A prospective study was conducted on healthy volunteers, each of whom underwent measurements of intraocular pressure (IOP), central macular thickness (CMT), subfoveal choroidal thickness (SFCT), radial peripapillary capillary perfusion (RPCP), superficial capillary plexus perfusion (SCPP), deep capillary plexus perfusion (DCPP), choriocapillaris perfusion (CCP), Sattler’s layer perfusion (SLP) and Haller’s layer perfusion (HLP) before and after OM. OM was performed for 2 min, consisting of 10-s turns of compression and decompression of the globe. Results: A total of 21 eyes from 21 participants (median age 29) were included. After OM, IOP significantly declined (p < 0.001), while SFCT (p < 0.005), SCPP (p < 0.001), DCPP (p = 0.004) and CCP (p = 0.008) significantly increased. CMT, RPCP, SLP and HLP did not show any significant alteration due to OM. Changes in SCPP correlated positively with changes in CCP and vice versa. Conclusions: OCTA-based analysis in healthy adults following OM demonstrated a significant increase of retinal perfusion values, assumed to be due to failure of autoregulatory mechanisms. These findings may indicate a positive effect of OM as a treatment option for patients with acute retinal artery occlusion.

scholarly journals Comparison of optical coherence tomography and high frequency ultrasound imaging in mice for the assessment of skin morphology and intradermal volumes

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Kornelia Schuetzenberger ◽  
Martin Pfister ◽  
Alina Messner ◽  
Vanessa Froehlich ◽  
Gerhard Garhoefer ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
High Frequency ◽  
Ex Vivo ◽  
Clinical Settings ◽  
Optical Coherence ◽  
High Frequency Ultrasound ◽  
Skin Morphology ◽  
Frequency Ultrasound ◽  
Good Agreement

Abstract Optical coherence tomography (OCT) and high-frequency ultrasound (HFUS), two established imaging modalities in the field of dermatology, were evaluated and compared regarding their applicability for visualization of skin tissue morphology and quantification of murine intradermal structures. The accuracy and reproducibility of both methods were assessed ex vivo and in vivo using a standardized model for intradermal volumes based on injected soft tissue fillers. OCT revealed greater detail in skin morphology, allowing for detection of single layers due to the superior resolution. Volumetric data measured by OCT (7.9 ± 0.3 μl) and HFUS (7.7 ± 0.5 μl) were in good agreement and revealed a high accuracy when compared to the injected volume of 7.98 ± 0.8 µl. In vivo, OCT provided a higher precision (relative SD: 26% OCT vs. 42% HFUS) for the quantification of intradermal structures, whereas HFUS offered increased penetration depth enabling the visualization of deeper structures. A combination of both imaging technologies might be valuable for tumor assessments or other dermal pathologies in clinical settings.

The impact of an eccentric intravascular ImageWire during coronary optical coherence tomography imaging

2011 ◽  
Vol 6 (8) ◽  
pp. 963-969 ◽  
Author(s):  
Nobuaki Suzuki ◽  
Giulio Guagliumi ◽  
Hirama Bezerra ◽  
Vasile Sirbu ◽  
Noah Rosenthal ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Tomography Imaging ◽  
Optical Coherence Tomography Imaging ◽  
The Impact
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