The correlation properties of speckle fields are studied for general paraxial systems. The previous studies on lateral and longitudinal speckle size for the case of free-space propagation (Fresnel transform) are generalized to the case of the linear canonical transform. These results have implications for the control of speckle size, through appropriate design of optical systems, with particular relevance for speckle interferometry.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/ol.32.003394 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Background: In developing countries, rheumatic mitral valve stenosis (MS) is still a problem and its progression leads to left atrial (LA) damage. Due to the complexity of the LA geometry, currently used techniques like antero-posterior dimension (LAD) and 2D echo derived LA volume (LAV) have several limitations that are corrected by 3D derived LA volumes in addition to functional evaluation.
Purpose: To assess the LA functions using 2D speckle tracking echocardiography and 3D transthoracic echocardiography in patients with clinically significant MS in comparison to normal healthy subjects.
Assessment of Atrial Size, Shape, and Contractility in Growth-Restricted and Small-for-Gestational-Age Fetuses.
J Ultrasound Med
January 2025
Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado, USA.
Objectives: The size, shape, and contractility of the heart's atrial chambers have not been evaluated in fetuses with growth restriction (FGR) or who are small-for-gestational-age (SGA) as defined by the Delphi consensus protocol. This study aimed to examine the atrial chambers using speckle tracking analysis to identify any changes that may be specific for either growth disturbance.
Methods: Sixty-three fetuses were evaluated with an estimated fetal weight <10th percentile who were classified as FGR or SGA based on the Delphi consensus protocol.
Association between antinuclear antibodies and pregnancy prognosis in recurrent pregnancy loss patients.
Hum Reprod
December 2024
Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Aichi, Japan.
Study Question: Can antinuclear antibodies (ANA) affect the subsequent live birth rate (LBR) in patients with unexplained recurrent pregnancy loss (RPL) in the absence of antiphospholipid antibodies (aPL)?
Summary Answer: Women with unexplained RPL have a high probability of live birth following a positive pregnancy test (>70%), being similar between those with positive and negative ANA testing, regardless of the cut-off value.
What Is Known Already: The RPL guidelines of the ESHRE state that 'ANA testing can be considered for explanatory purposes'. However, there have been a limited number of studies on this issue and sample sizes have been small, and the impact of ANA on the pregnancy prognosis is unclear.
Inflammatory bowel disease and cardiac function: a systematic review of literature with meta-analysis.
Therap Adv Gastroenterol
December 2024
Gastroenterology Department, Unidade Local de Saúde de Viseu Dão Lafões, Viseu, Portugal.
Background: Morphological and functional cardiac involvement is rarely described in patients with inflammatory bowel disease (IBD) but there is evidence that they have an increased risk of cardiovascular (CV) events despite the lower prevalence of traditional CV risk factors.
Objectives: Our systematic review and meta-analysis examined the relationship between IBD and cardiac function, namely the incidence of heart failure (HF) and subclinical echocardiographic changes.
Data Sources And Methods: Two medical databases, PubMed and Scopus, were systematically searched up to September 2022 to identify all studies reporting HF and/or echocardiographic changes in IBD patients.
Automated non-invasive laser speckle imaging of the chick heart rate and extraembryonic blood vessels and their response to Nifedipine and Amlodipine drugs.
Dev Biol
March 2025
Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, USA.
Using our recently developed laser speckle contrast imaging (LSCI) to visualize blood vessels and monitor blood flow noninvasively, we test the utility of the developing chick heart as a functional model for drug screening. To this end, we examined the effects of antihypertensive agents Nifedipine and Amlodipine, belonging to the L-type calcium channel antagonist family, on blood flow visualized noninvasively through the intact shell. Guided by the live view mode, the drugs were injected through the shell and ventral to HH16-19 chick embryos.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!