scholarly journals Comprehensive Detection, Grading, and Growth Behavior Evaluation of Subthreshold and Low Intensity Photocoagulation Lesions by Optical Coherence Tomographic and Infrared Image Analysis

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Stefan Koinzer ◽  
Amke Caliebe ◽  
Lea Portz ◽  
Mark Saeger ◽  
Yoko Miura ◽  
...  
Keyword(s):  
Treatment Efficacy ◽  
Clinical Effect ◽  
Infrared Image ◽  
Growth Behavior ◽  
Retinal Damage ◽  
Optical Coherence ◽  
Retinal Area ◽  
Low Intensity ◽  
Irradiation Power

Purpose. To correlate the long-term clinical effect of photocoagulation lesions after 6 months, as measured by their retinal damage size, to exposure parameters. We used optical coherence tomographic (OCT)-based lesion classes in order to detect and assess clinically invisible and mild lesions.Methods. In this prospective study, 488 photocoagulation lesions were imaged in 20 patients. We varied irradiation diameters (100/300 µm), exposure-times (20–200 ms), and power. Intensities were classified in OCT images after one hour, and we evaluated OCT and infrared (IR) images over six months after exposure.Results. For six consecutive OCT-based lesion classes, the following parameters increased with the class: ophthalmoscopic, OCT and IR visibility rate, fundus and OCT diameter, and IR area, but not irradiation power. OCT diameters correlated with exposure-time, irradiation diameter, and OCT class. OCT classes discriminated the largest bandwidth of OCT diameters.Conclusion. OCT classes represent objective and valid endpoints of photocoagulation intensity even for “subthreshold” intensities. They are suitable to calculate the treated retinal area. As the area is critical for treatment efficacy, OCT classes are useful to define treatment intensity, calculate necessary lesion numbers, and universally categorize lesions in clinical studies.

Inner Retinal Morphology and Visual Outcomes in Idiopathic Epiretinal Membrane Surgery: A Retrospective Optical Coherence Tomography Study

2021 ◽  
pp. 247412642198961
Author(s):  
Ioannis S. Dimopoulos ◽  
Michael Dollin
Keyword(s):  
Optical Coherence Tomography ◽  
Epiretinal Membrane ◽  
Strong Predictor ◽  
Plexiform Layer ◽  
Inner Plexiform Layer ◽  
Optical Coherence ◽  
Visual Outcomes ◽  
Retinal Pathology

Purpose: Epiretinal membrane (ERM) is a common retinal finding for patients older than 50 years. Disorganization of the retinal inner layers (DRIL) has emerged as a novel predictor of poor visual acuity (VA) in eyes with inner retinal pathology. The aim of our study is to correlate preoperative DRIL with visual outcomes after ERM surgery. Methods: Medical records and optical coherence tomography (OCT) images of 81 pseudophakic patients who underwent treatment of idiopathic ERM were reviewed. Preoperative DRIL on OCT was correlated with VA at baseline and at 3 and 6 months after ERM surgery. DRIL was defined as the loss of distinction between the ganglion cell–inner plexiform layer complex, inner nuclear layer, and outer plexiform layer. DRIL severity was based on its extent within the central 2-mm region of a transfoveal B-scan (absent/mild: <one-third, severe: >one-third horizontal width). Results: Review of preoperative OCT showed severe DRIL in 41% and absent/mild DRIL in 59%. Severe DRIL was associated with worse baseline VA ( P < .001). Preoperative VA and DRIL status at baseline were both predictors of postoperative VA at follow-up time points ( P < .001). Severe DRIL was associated with significantly less improvement in VA at 6 months (–0.23 logMAR for absent/mild vs –0.14 for severe DRIL). Conclusions: Presence of severe preoperative DRIL correlates with worse baseline VA in patients with ERM and reduced VA improvement at 6 months. DRIL can be a strong predictor of long-term poor visual outcomes in ERM surgery.

scholarly journals Day and Night Clouds Detection Using a Thermal-Infrared All-Sky-View Camera

2021 ◽  
Vol 13 (9) ◽  
pp. 1852
Author(s):  
Yiren Wang ◽  
Dong Liu ◽  
Wanyi Xie ◽  
Ming Yang ◽  
Zhenyu Gao ◽  
...  
Keyword(s):  
Infrared Image ◽  
Thermal Infrared ◽  
Field Of View ◽  
Detection Scheme ◽  
Detection Approach ◽  
Cloud Characteristics ◽  
Formation And Evolution ◽  
Fish Eye ◽  
Infrared Channel

The formation and evolution of clouds are associated with their thermodynamical and microphysical progress. Previous studies have been conducted to collect images using ground-based cloud observation equipment to provide important cloud characteristics information. However, most of this equipment cannot perform continuous observations during the day and night, and their field of view (FOV) is also limited. To address these issues, this work proposes a day and night clouds detection approach integrated into a self-made thermal-infrared (TIR) all-sky-view camera. The TIR camera consists of a high-resolution thermal microbolometer array and a fish-eye lens with a FOV larger than 160°. In addition, a detection scheme was designed to directly subtract the contamination of the atmospheric TIR emission from the entire infrared image of such a large FOV, which was used for cloud recognition. The performance of this scheme was validated by comparing the cloud fractions retrieved from the infrared channel with those from the visible channel and manual observation. The results indicated that the current instrument could obtain accurate cloud fraction from the observed infrared image, and the TIR all-sky-view camera developed in this work exhibits good feasibility for long-term and continuous cloud observation.

Thickness mapping of the inner retina by spectral-domain optical coherence tomography in an N-methyl-d-aspartate-induced retinal damage model

2013 ◽  
Vol 113 ◽  
pp. 19-25 ◽  
Author(s):  
Yuta Ohno ◽  
Shuichi Makita ◽  
Masamitsu Shimazawa ◽  
Kazuhiro Tsuruma ◽  
Yoshiaki Yasuno ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Damage Model ◽  
Spectral Domain ◽  
Retinal Damage ◽  
Optical Coherence ◽  
Inner Retina

scholarly journals Clinical effect of long-term administration of tolvaptan in patients with heart failure and chronic kidney disease

2018 ◽  
Vol 12 (3) ◽  
pp. 154-160
Author(s):  
Yohei Ono ◽  
Hiroto Takamatsu ◽  
Masahiro Inoue ◽  
Yukio Mabuchi ◽  
Tetsuya Ueda ◽  
...  
Keyword(s):  
Heart Failure ◽  
Chronic Kidney Disease ◽  
Kidney Disease ◽  
Clinical Effect ◽  
Patients With Heart Failure ◽  
Term Administration

Conclusion

2018 ◽  
pp. 273-289
Author(s):  
Sudha Pai ◽  
Sajjan Kumar
Keyword(s):  
Social Inequalities ◽  
Right Wing ◽  
Profound Change ◽  
Grass Roots ◽  
Low Intensity ◽  
The Relationship

The book concludes that the pattern of communalism and riots in the 2000s marks a new chapter in UP society. The reasons lie in momentous changes within UP society, and a ‘new’ BJP, its leadership, re-invented ideology and strategies. Our model of ‘institutionalization of everyday communalism’ suggests that the relationship between communalism and riots has undergone profound change: it is not riots that promote communalism; rather it is the steady and long-term work at the grass roots by right-wing forces that promotes the growth of constant communal tension. Rather than big riots, the aim is to communalize trivial, daily incidents and create small, low-intensity, calibrated incidents whose purpose is to create deep-seated Hindu–Muslim polarization. UP with its divisive communal past, economic backwardness, pervasive social inequalities, continuing conservative outlook and entrenched caste/communal identities, has produced a specific variant of communalism that will impact on the democratic fabric of our country.

Family Intervention Approach to Loss of Clinical Effect During Long-Term Antidepressant Treatment

2007 ◽  
Vol 68 (09) ◽  
pp. 1348-1351 ◽  
Author(s):  
Stefania Fabbri ◽  
Giovanni A. Fava ◽  
Chiara Rafanelli ◽  
Elena Tomba
Keyword(s):  
Clinical Effect ◽  
Antidepressant Treatment ◽  
Family Intervention ◽  
Intervention Approach
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