Changes in Fabric Surface Pilling under Laser Ablation

Textiles require finishing to improve their usability and functionality but in the first place, to reduce of pilling tendency, which affects all kinds of synthetic and natural fabrics. Several laser ablation tests have been applied to the selected fabrics with different chemical composition to reveal the impact of this process on the pilling behavior. To reflect the pilling changes, two textural descriptors have been proposed to textile images obtained with optical coherence tomography (OCT). They showed the trend to reduce values with increasing laser power applied to the tested fabrics. It has been demonstrated, that in the case of textiles based on polyester threads, laser modification of the product surface led to a significant reduction in their tendency for pilling.

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

The Egyptian Heart Journal ◽

10.1186/s43044-020-00110-z ◽

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.

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

Photonics in Dermatology and Plastic Surgery 2021 ◽

10.1117/12.2577822 ◽

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

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

Ophthalmic Surgery Lasers and Imaging Retina ◽

10.3928/15428877-20091230-12 ◽

2010 ◽

Vol 41 (1) ◽

pp. 67-71 ◽

Cited By ~ 5

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

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

Medicina ◽

10.3390/medicina56120645 ◽

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.

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The impact of three-dimensional optical coherence tomography and kissing-balloon inflation for stent implantation to bifurcation lesions

Journal of Cardiology Cases ◽

10.1016/j.jccase.2015.12.003 ◽

2016 ◽

Vol 13 (5) ◽

pp. 133-136 ◽

Cited By ~ 2

Author(s):

Hiroshi Koiwaya ◽

Masao Takemoto ◽

Kenji Ogata ◽

Tatsuya Nakama ◽

Makoto Furugen ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Stent Implantation ◽

Three Dimensional ◽

Optical Coherence ◽

Balloon Inflation ◽

Bifurcation Lesions ◽

The Impact

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A Method for the Assessment of Textile Pilling Tendency Using Optical Coherence Tomography

Sensors ◽

10.3390/s20133687 ◽

2020 ◽

Vol 20 (13) ◽

pp. 3687

Author(s):

Joanna Sekulska-Nalewajko ◽

Jarosław Gocławski ◽

Ewa Korzeniewska

Keyword(s):

Optical Coherence Tomography ◽

Experimental Studies ◽

Principal Component ◽

Feature Space ◽

Optical Coherence ◽

Strongly Correlated ◽

Mechanical Removal ◽

Unnecessary Procedures ◽

Fabric Surface ◽

Different Thickness

Pilling is caused by friction pulling and fuzzing the fibers of a material. Pilling is normally evaluated by visually counting the pills on a flat fabric surface. Here, we propose an objective method of pilling assessment, based on the textural characteristics of the fabric shown in optical coherence tomography (OCT) images. The pilling layer is first identified above the fabric surface. The percentage of protruding fiber pixels and Haralick’s textural features are then used as pilling descriptors. Principal component analysis (PCA) is employed to select strongly correlated features and then reduce the feature space dimensionality. The first principal component is used to quantify the intensity of fabric pilling. The results of experimental studies confirm that this method can determine the intensity of pilling. Unlike traditional methods of pilling assessment, it can also detect pilling in its early stages. The approach could help to prevent overestimation of the degree of pilling, thereby avoiding unnecessary procedures, such as mechanical removal of entangled fibers. However, the research covered a narrow group of fabrics and wider conclusions about the usefulness and limitations of this method can be drawn after examining fabrics of different thickness and chemical composition of fibers.

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