Plane-wave scintillation is shown to impose multiconjugate adaptive optics (MCAO) correctability limitations that are independent of wavefront sensing and reconstruction. Residual phase and log-amplitude variances induced by scintillation in weak turbulence are derived using linear (diffraction-based) diffractive MCAO spatial filters or (diffraction-ignorant) geometric MCAO proportional gains as open-loop control parameters. In the case of Kolmogorov turbulence, expressions involving the Rytov variance and/or weighted C(2)(n) integrals apply. Differences in performance between diffractive MCAO and geometric MCAO resemble chromatic errors. Optimal corrections based on least squares imply irreducible performance limits that are validated by wave-optic simulations.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/josaa.23.002602 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Monocyte-Derived cxcl12 Guides a Directional Migration of Blood Vessels in Zebra Fish.
Arterioscler Thromb Vasc Biol
January 2025
School of Life Science, Nantong Laboratory of Development and Diseases and Co-Innovation Center of Neuroregeneration, Nantong University, China.
Background: Sprouting blood vessels, reaching the aimed location, and establishing the proper connections are vital for building vascular networks. Such biological processes are subject to precise molecular regulation. So far, the mechanistic insights into understanding how blood vessels grow to the correct position are limited.
View Article and Find Full Text PDFRapid prospective motion correction using free induction decay and stationary field probe navigators at 7T.
Magn Reson Med
January 2025
MR Physics, German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany.
Purpose: MR-based FID navigators (FIDnavs) do not require gradient pulses and are attractive for prospective motion correction (PMC) due to short acquisition times and high sampling rates. However, accuracy and precision are limited and depend on a separate calibration measurement. Besides FIDnavs, stationary NMR field probes are also capable of measuring local, motion-induced field changes.
View Article and Find Full Text PDFPerformance of Chat Generative Pre-trained Transformer-4o in the Adult Clinical Cardiology Self-Assessment Program.
Eur Heart J Digit Health
January 2025
Cardiovascular Center, Tufts Medical Center, 800 Washington Street, Boston, MA 02111, USA.
Aims: This study evaluates the performance of OpenAI's latest large language model (LLM), Chat Generative Pre-trained Transformer-4o, on the Adult Clinical Cardiology Self-Assessment Program (ACCSAP).
Methods And Results: Chat Generative Pre-trained Transformer-4o was tested on 639 ACCSAP questions, excluding 45 questions containing video clips, resulting in 594 questions for analysis. The questions included a mix of text-based and static image-based [electrocardiogram (ECG), angiogram, computed tomography (CT) scan, and echocardiogram] formats.
Audit of upper gastrointestinal tract series examinations for diagnosing intestinal malrotation in a resource-limited radiology department in Southern Africa.
Surg Pract Sci
September 2023
Grey's Hospital, Pietermaritzburg, KwaZulu-Natal.
Background: Intestinal malrotation is a congenitally acquired condition of abnormally rotated proximal small bowel in neonates and infants. Prompt recognition prevents lifethreatening complications. A structured approach to diagnosing malrotation at UGIS is required for accurate diagnosis.
View Article and Find Full Text PDFEvaluating the Accuracy of ChatGPT in the Japanese Board-Certified Physiatrist Examination.
Cureus
December 2024
Department of Rehabilitation Medicine, Mie University Graduate School of Medicine, Tsu, JPN.
Background Generative artificial intelligence (AI), such as Chat Generative Pre-trained Transformer (ChatGPT), has shown potential in various medical applications, including answering licensing examination questions. However, its performance in rehabilitation medicine remains underexplored. This study aimed to evaluate the accuracy of ChatGPT4o in answering questions from the Japanese Board-Certified Physiatrist Examination and assess its potential as an educational and clinical support tool.
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!