Quantitative NMR spectroscopy (qNMR) is an essential tool in organic chemistry, with applications including reaction monitoring, mechanistic analysis, and purity determination. Establishing the correct acquisition rate for consecutive qNMR scans requires knowledge of the longitudinal relaxation time constants () for all of the nuclei being monitored. We report a simple method that is about 10-fold faster than the conventional inversion recovery technique for the estimation of .
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.joc.1c01007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
3D MRI with CT-like bone contrast (3D-BONE): a pictorial review of clinical applications.
Acta Radiol
January 2025
Department of Radiology, Changi General Hospital, Singapore, Republic of Singapore.
Background: Computed tomography (CT) is the gold standard imaging modality for the assessment of 3D bony morphology but incurs the cost of ionizing radiation exposure. High-resolution 3D magnetic resonance imaging (MRI) with CT-like bone contrast (CLBC) may provide an alternative to CT in allowing complete evaluation of both bony and soft tissue structures with a single MRI examination.
Purpose: To review the technical aspects of an optimized stack-of-stars 3D gradient recalled echo pulse sequence method (3D-Bone) in generating 3D MR images with CLBC, and to present a pictorial review of the utility of 3D-Bone in the clinical assessment of common musculoskeletal conditions.
Machine learning applications in placenta accreta spectrum disorders.
Eur J Obstet Gynecol Reprod Biol X
March 2025
Mother and Newborn Health Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
This review examines the emerging applications of machine learning (ML) and radiomics in the diagnosis and prediction of placenta accreta spectrum (PAS) disorders, addressing a significant challenge in obstetric care. It highlights recent advancements in ML algorithms and radiomic techniques that utilize medical imaging modalities like magnetic resonance imaging (MRI) and ultrasound for effective classification and risk stratification of PAS. The review discusses the efficacy of various deep learning models, such as nnU-Net and DenseNet-PAS, which have demonstrated superior performance over traditional diagnostic methods through high AUC scores.
View Article and Find Full Text PDFBrain Iron Deposition Alterations in Type 2 Diabetes Mellitus Patients With Mild Cognitive Impairment Based on Quantitative Susceptibility Mapping.
J Diabetes
January 2025
Department of Radiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing City, Jiangsu Province, China.
Background: Iron is one of the most important elements in brain that may has a direct impact on the stability of central nervous system. The current study devoted to explore the alterations of iron distribution across the whole brain in type 2 diabetes mellitus (T2DM) patients with mild cognitive impairment (MCI).
Methods: The quantitative susceptibility mapping (QSM) technique was used to quantify the intracranial iron content of 74 T2DM patients with MCI and 86 T2DM patients with normal cognition (NC).
Deuterated Nanopolymers for Renal and Lymphatic Imaging via Quantitative Deuterium MRI.
Nano Lett
January 2025
NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany.
Deuterium (H) MRI is an emerging tool for noninvasive imaging. We explore the integration of H MRI with deuterated multifunctional nanopolymers for deuterated particle imaging (DPI). To this end, amine-terminated G5-polyamidoamine (PAMAM) dendrimers were labeled with deuterated acetyl surface groups, leading to highly H-loaded bioparticles, making them ideal for imaging studies.
View Article and Find Full Text PDFPrevalence and Risk Factors for Medial Meniscus Ramp Lesions in the Setting of Pediatric Anterior Cruciate Ligament Injuries: A Systematic Review and Meta-analysis.
J Pediatr Orthop
January 2025
Department of Pediatric Orthopedic Surgery, Hospital for Special Surgery, New York, NY.
Background: Medial meniscus ramp lesions (MMRLs) are commonly associated with anterior cruciate ligament (ACL) injuries and may increase the risk of graft failure after ACL reconstruction (ACLR) if undiagnosed or left untreated. Although MMRLs have been extensively reported in adults, there are limited studies describing them in pediatric patients undergoing ACLR. The purpose of this study was to perform a systematic review and meta-analysis to determine the pooled prevalence of and risk factors for MMRLs in pediatric patients with ACL injuries.
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!