Publications by authors named "Beyer C"

Purpose: We aim to assess the magnetic resonance imaging (MRI)-to-CT deformable image registration (DIR) quality of our treatment planning system in the pelvic region as the first step of an online MRI-guided particle therapy clinical workflow.

Materials And Methods: Using 2 different DIR algorithms, ANAtomically CONstrained Deformation Algorithm (ANACONDA), the DIR algorithm incorporated in RayStation, and Elastix, an open-source registration software, we retrospectively assessed the quality of the deformed CT (dCT) generation in the pelvic region for 5 patients. T1- and T2-weighted daily control MRI acquired prior to treatment delivery were used for the DIR.

View Article and Find Full Text PDF

: Left atrial (LA) fibrosis imaging improves the guidance of LA catheter ablation. Cardiac computed tomography (CT) may be a reasonable alternative to CMR. The aim was to evaluate late enhancement (LE) fibrosis mapping by CT, and to correlate the results with low-voltage areas on electroanatomical mapping (EAM).

View Article and Find Full Text PDF

Rising global pediatric obesity rates, increase non-alcoholic fatty liver disease (NAFLD) and metabolic syndrome (MetS) prevalence, with MetS being a NAFLD risk factor. NAFLD can be asymptomatic, with liver function tests insensitive to mild disease, and liver biopsy, risking complications. Thus, we investigated multiparametric MRI (mpMRI) metrics of liver fat (proton density fat fraction, PDFF) and disease activity (fibro-inflammation; iron-corrected T1, cT1), in a Hispanic pre-pubertal pediatric cohort, with increased risk of NAFLD.

View Article and Find Full Text PDF

Background: Multiparametric MRI markers of liver health corrected T1 (cT1) and proton density fat fraction (PDFF) have shown utility in the management of various chronic liver diseases. We assessed the normal population reference range of both cT1 and PDFF in healthy child and adult volunteers without any known liver disease.

Methods: A retrospective multi-centre pooled analysis of 102 child and young adult (9.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates the impact of SARS-CoV-2 on the cardiovascular system, specifically looking at how the virus affects the endothelium and can lead to coronary artery diseases and vasculitis.
  • Researchers performed coronary computed tomography angiography (CTA) on patients recently infected with SARS-CoV-2 to identify atypical coronary lesions and related inflammation.
  • Results showed that while a significant number of acute patients exhibited serious heart conditions, most stable patients did not have severe coronary artery disease, highlighting the usefulness of CTA in evaluating COVID-19 related cardiac issues.
View Article and Find Full Text PDF
Article Synopsis
  • MRI biomarkers like iron corrected T1 (cT1) and liver fat content (LFC) are promising noninvasive alternatives to liver biopsies, showing potential associations with liver disease improvement.
  • A study analyzed data from 150 participants in clinical trials, revealing that responders (those who had a resolution of steatohepatitis) demonstrated significantly greater reductions in cT1 and LFC compared to non-responders.
  • These findings suggest that significant changes in these MRI markers can help predict histological improvements in liver health following treatment, highlighting their potential utility in clinical settings.
View Article and Find Full Text PDF

Mitochondria are vital for cellular activities, influencing ATP production, Ca2 signaling, and reactive oxygen species generation. It has been proposed that nuclear genome-derived circular RNAs (circRNAs) play a role in biological processes. For the first time, this study aims to comprehensively explore experimentally confirmed human mitochondrial genome-derived circRNAs (mt-circRNAs) via in-silico analysis.

View Article and Find Full Text PDF

Background: Quantitative magnetic resonance imaging metrics iron-corrected T1 (cT1) and liver fat from proton density fat-fraction (PDFF) are both commonly used as noninvasive biomarkers for metabolic dysfunction-associated steatohepatitis (MASH); however, their repeatability in this population has rarely been characterized.

Purpose: To quantify the variability of cT1 and liver fat fraction from PDFF in patients with biopsy-confirmed metabolic dysfunction-associated steatotic liver disease (MASLD) and MASH.

Study Type: Prospective, single center.

View Article and Find Full Text PDF

Objective: Lipomatous hypertrophy of the interatrial septum (LHIS) is a distinct section of epicardial adipose tissue. However, its association with COPD is poorly documented.

Methods: Patients undergoing coronary computed tomography angiography (CTA) for clinical indications were recruited retrospectively and screened for LHIS and COPD.

View Article and Find Full Text PDF

This study assessed the impact of current home practices including reheating, standing, and stirring on mitigation of furan and its derivatives in vegetable-based infant meals. Three vegetable-based infant meals (vegetables alone, with fish, with meat) underwent different home practices including reheating, post-reheating standing (60, 120 and 240 s) and post-reheating stirring (30, 60, 120 and 240 s). Targeted quantification of furan, 2-methylfuran (2-MF) and 3-methylfuran (3-MF) and exploration of additional furan derivatives were undertaken in treated and untreated vegetable-based infant meals using SHS-GC-Q Exactive-Orbitrap-MS.

View Article and Find Full Text PDF

Objective:  Patellar luxation (PL) is commonly diagnosed in dogs and cats; however, a traumatic cause is poorly reported in the literature. The aim of this study was to report the clinical presentation, surgical treatment, and outcome in dogs and cats surgically treated for traumatic PL.

Study Design:  This is a retrospective study.

View Article and Find Full Text PDF
Article Synopsis
  • - The study explores the importance of obtaining clear magnetic resonance (MR) images during ion radiotherapy and analyzes the quality of these images in an experimental setup using phantom imaging and simultaneous irradiation.
  • - An open MR scanner was set up in front of an ion beamline, revealing that certain artifacts (like ghosting) in images were related to the magnetic field effects from the beam scanning process, especially under specific conditions.
  • - Using a fast imaging pulse sequence minimized image artifacts, demonstrating that real-time MR imaging could be successfully implemented in future hybrid radiotherapy devices.
View Article and Find Full Text PDF

Serum liver tests (serum tests) and histological assessment for T-cell-mediated rejection are essential for post-liver transplant monitoring. Liver biopsy carries a risk of complications that are preferably avoided in low-risk patients. Multiparametric magnetic resonance imaging (mpMRI) is a reliable noninvasive diagnostic method that quantifies liver disease activity and has prognostic utility.

View Article and Find Full Text PDF

Anorexia nervosa (AN) is a severe eating disorder that predominantly affects females and typically manifests during adolescence. There is increasing evidence that serum cytokine levels are altered in individuals with AN. Previous research has largely focused on adult patients, assuming a low-grade pro-inflammatory state.

View Article and Find Full Text PDF

Background: Particle therapy makes a noteworthy contribution in the treatment of tumor diseases. In order to be able to irradiate from different angles, usually expensive, complex and large gantries are used. Instead rotating the beam via a gantry, the patient itself might be rotated.

View Article and Find Full Text PDF
Article Synopsis
  • * A systematic review collected and evaluated 23 studies on the epigenetics of AN, highlighting epigenome-wide association studies (EWASs) as promising avenues for understanding disease mechanisms and potential biomarkers.
  • * Future research should focus on larger sample sizes, longitudinal designs, and consistent methodologies to improve insights into AN's pathophysiology and enhance patient treatments and outcomes.
View Article and Find Full Text PDF

Objectives: Public campaigns such as the "Go-red-for-women"-initiative have raised heart-disease awareness and may trigger overutilization of coronary computed tomography angiography (CTA). Objective was to investigate the diagnostic efficacy of coronary CTA stratified by age and gender.

Methods: 1882 consecutive patients (58.

View Article and Find Full Text PDF

Previous studies have demonstrated a brain volume decrease linked to long-term starvation in patients with anorexia nervosa (AN). Food intake is critically diminished in this disorder, leading to one of the highest mortality rates within the psychiatric disease spectrum. As reported in animal models, astrocytes seem to be the most affected cell type in AN.

View Article and Find Full Text PDF

Background: Benzodiazepines and antidepressants are effective agents for the treatment of generalized anxiety disorder (GAD), with the HAM-A frequently used as a primary outcome measure. The GAD literature is inconsistent regarding which medications are more effective for somatic versus psychic symptoms of GAD, and treatment guidelines do not advocate for prescribing based on subtype. This meta-analysis aimed to determine whether benzodiazepines and antidepressants have a differential impact on the somatic versus psychic subscales of the HAM-A in GAD.

View Article and Find Full Text PDF

Anorexia nervosa (AN) has a multifaceted and complex pathology, yet major gaps remain in our understanding of factors involved in AN pathology. MicroRNAs (miRNAs) play a regulatory role in translating genes into proteins and help understand and treat diseases. An extensive literature review on miRNAs with AN and comorbidities has uncovered a significant lack in miRNA research.

View Article and Find Full Text PDF
Article Synopsis
  • Concomitant chest wall and unstable thoracolumbar fractures are rare but serious injuries that need a team-based treatment approach.
  • There isn't much research on the best timing and order for surgery in patients with these multiple injuries.
  • Based on our experience with two patients, we recommend fixing chest wall fractures earlier in suitable cases before positioning patients for spinal surgery.
View Article and Find Full Text PDF

Grafting, the careful selection of rootstocks and scions, has played a crucial role maintaining Chilean avocado fruit quality standards in a scenario in which climate change and drought-related issues have considerably decreased avocado fruit production in the last fifteen years. The historical use of seedling rootstocks in Chile has experienced a recent shift towards clonal rootstocks, driven by the potential to produce more consistent and predictable crops. This research aims to compare Hass avocado plants grafted on Mexicola seedling and Dusa clonal rootstocks in a soilless and protected system using (i) a differential expression analysis of root and leaf samples and (ii) a fruit transcriptomic and metabolomic integration analysis to improve our understanding of rootstock-scion interaction and its impact on avocado tree performance and fruit quality.

View Article and Find Full Text PDF

Objectives: Percutaneously placed small-bore (14 Fr) catheters and pleural lavage have emerged independently as innovative approaches to hemothorax management. This report describes techniques for combining percutaneous thoracostomy with pleural lavage and presents results from a performance improvement series of patients managed with percutaneous thoracostomy with immediate lavage.

Methods: This was a prospective performance improvement series of patients treated at a level 1 trauma center with percutaneous thoracostomy and immediate lavage between April 2021 and May 2023.

View Article and Find Full Text PDF

Background: Over the last eight decades, many evidence-based interventions (EBIs) have been developed to reduce amenable under-5 mortality (U5M). Implementation research can help reduce the lag between discovery and delivery, including as new EBIs emerge, or as existing ones are adapted based on new research. Rwanda was the first low-income African country to implement the rotavirus vaccine (RTV) and also adopted Option B+ for effective prevention of mother-to-child transmission (PMTCT) before the World Health Organization's (WHO) recommendation.

View Article and Find Full Text PDF