A Review on Analysis of Speckle reduction in Ultra Sound Images

2018 ◽  
Vol 6 (6) ◽  
pp. 1136-1143
Author(s):  
Nagaraj Bhat
Keyword(s):  
Ultra Sound ◽  
Speckle Reduction

Laser Beam Modulation with a Fast Focus Tunable Lens for Speckle Reduction in Laser Projection Displays

2019 ◽  
pp. 1275
Author(s):  
Zequn Jian ◽  
Zhaomin Tong ◽  
Yifei Ma ◽  
Mei Wang ◽  
Suotang Jia ◽  
...  
Keyword(s):  
Laser Beam ◽  
Speckle Reduction ◽  
Beam Modulation ◽  
Laser Beam Modulation ◽  
Tunable Lens

Speckle reduction of SAR image based on morphological Haar wavelet

2013 ◽  
Vol 32 (3) ◽  
pp. 746-748 ◽  
Author(s):  
Min LI ◽  
Zi-you ZHANG ◽  
Lin-ju LU
Keyword(s):  
Haar Wavelet ◽  
Speckle Reduction ◽  
Sar Image

scholarly journals The hidden burden of adolescent pregnancies in rural Sri Lanka; findings of the Rajarata Pregnancy Cohort

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Thilini Chanchala Agampodi ◽  
Nuwan Darshana Wickramasinghe ◽  
Hemali Gayathri Jayakodi ◽  
Gayani Shashikala Amarasinghe ◽  
Janith Niwanthaka Warnasekara ◽  
...  
Keyword(s):  
Mental Health ◽  
Sri Lanka ◽  
Pregnant Women ◽  
Adolescent Mothers ◽  
Depression Scale ◽  
Ultra Sound ◽  
Physical And Mental Health ◽  
Pregnancy Cohort ◽  
Contraceptive Usage ◽  
Adolescent Pregnancies

Abstract Background Adolescent fertility is a main indicator of the Sustainable Developmental Goal (SGD) three. Although Sri Lanka is exemplary in maternal health, the utilization of Sexual and Reproductive Health services (SRH) by adolescents is less documented. We describe the hidden burden, associated biological and psychosocial factors and utilization patterns of pre-conceptional services among pregnant adolescents in rural Sri Lanka. Methods The study is based on the baseline assessment of the Rajarata Pregnancy Cohort (RaPCo) in Anuradhapura. Pregnant women newly registered from July to September 2019 were recruited to the study. The period of gestation was confirmed during the second follow-up visit (around 25–28 weeks of gestation) using ultra sound scan data. A history, clinical examination, anthropometric measurements, blood investigations were conducted. Mental health status was assessed using the Edinburgh Postpartum Depression Scale (EPDS). Results Baseline data on gestation was completed by 3,367 pregnant women. Of them, 254 (7.5%) were adolescent pregnancies. Among the primigravida mothers (n = 1037), 22.4% (n = 233) were adolescent pregnancies. Maternal and paternal low education level, being unmarried, and less time since marriage were statistically significant factors associated with adolescent pregnancies (p < 0.05). Contraceptive usage before pregnancy, utilization of pre-conceptional health care services, planning pregnancy and consuming folic acid was significantly low among adolescents (p < 0.001). They also had low body mass index (p < 0.001) and low hemoglobin levels (p = 0.03). Adolescent mothers were less happy of being pregnant (p = 0.006) and had significantly higher levels of anxiety (p = 0.009). Conclusion One fifth of women in their first pregnancy in this study population are adolescents. Nulli-parous adolescents exert poor social stability and compromised physical and mental health effects. The underutilization and/or unavailability of SRH services is clearly associated with adolescent pregnancies.

Selection of Suitable Window Size for Speckle Reduction and Deblurring using SOFM in Polarimetric SAR Images

2015 ◽  
Vol 43 (4) ◽  
pp. 739-750 ◽  
Author(s):  
Sanjay Shitole ◽  
Shaunak De ◽  
Y. S. Rao ◽  
B. Krishna Mohan ◽  
Anup Das
Keyword(s):  
Window Size ◽  
Speckle Reduction ◽  
Polarimetric Sar ◽  
Sar Images ◽  
Selection Of

scholarly journals Dynamic Speckle Illumination Digital Holographic Microscopy by Doubly Scattered System

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 276
Author(s):  
Yun Liu ◽  
Peihua Bu ◽  
Mingxing Jiao ◽  
Junhong Xing ◽  
Ke Kou ◽  
...  
Keyword(s):  
Time Correlation ◽  
Digital Holographic Microscopy ◽  
Laser Source ◽  
Speckle Reduction ◽  
Single Shot ◽  
Coherent Noise ◽  
Real Time Measurement ◽  
Dynamic Speckle ◽  
Holographic Microscopy ◽  
Speckle Suppression

The coherent noise always exists in digital holographic microscopy due to the laser source, degrading the image quality. A method of speckle suppression using the dynamic speckle illumination, produced by double-moving diffusers, is presented in digital holographic microscopy. The space–time correlation functions are theoretically analyzed from the statistics distribution in the doubly and singly scattered system, respectively. The configuration of double-moving diffusers is demonstrated to have better performance in speckle suppression compared with the single diffuser and moving-static double diffusers cases. The experiment results verify the feasibility of the approach. The presented approach only requires a single shot interferogram to realize the speckle reduction, accordingly it has the potential application in real-time measurement.

scholarly journals Antioxidant, Antihypertensive and Antimicrobial Properties of Phenolic Compounds Obtained from Native Plants by Different Extraction Methods

2021 ◽  
Vol 18 (5) ◽  
pp. 2475
Author(s):  
Francisco Ramiro Boy ◽  
Rocío Casquete ◽  
Ana Martínez ◽  
María de Guía Córdoba ◽  
Santiago Ruíz-Moyano ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Phenolic Compounds ◽  
Native Plants ◽  
Antimicrobial Properties ◽  
Extraction Methods ◽  
Ultra Sound ◽  
Antihypertensive Activity ◽  
Ultrasound Extraction ◽  
Rubus Ulmifolius ◽  
Cistus Salviifolius

This study aims to evaluate the efficacy of two methods (agitation and ultra-sound) for extracting phenolic compounds from 15 native plants. Plant species collected in the Dehesa of Extremadura were used. The antioxidant, antihypertensive and antimicrobial activity of the phenolic extracts was investigated. Significantly different results were obtained when comparing the two extraction methods, with the highest concentrations of phenolic compounds found for ultrasound extraction. In addition, the extracts obtained for Cistus albidus, Cistus salviifolius, Rubus ulmifolius and Quercus ilex showed the highest concentrations of phenolic compounds. The antioxidant activity was higher in the extracts of Cistus and Q. ilex obtained by ultrasound, as was the antihypertensive activity. Antimicrobial activity was also higher in the extracts obtained by ultrasound from C. salviifolius and Q. ilex plants against bacteria and from Cistus ladanifer against yeasts. Therefore, it can be concluded that, with the ultrasound extraction of phenolic compounds from C. ladanifer, C. albidus and Q. ilex plants, it is possible to obtain extracts with important functional properties, so they could be studied for their use in food with the aim of obtaining healthy and safe products, favouring the sustainability of the environment of the Dehesa Extremeña.

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