1,364 results match your criteria: "CREATIS; Universite de Lyon; Universite Lyon1; CNRS UMR5220; INSERM U1044; INSA Lyon[Affiliation]"

This article describes some of the key prevention services in the Leon Berard Comprehensive Cancer Center (CLB) Lyon, France, which are based on clinical prevention services, outreach activities, and collaboration with professional and territorial health communities. In addition, research is embedded at all stages of the prevention continuum, from understanding cancer causes through to the implementation of prevention interventions during and after cancer. Health promotion activities in the community and dedicated outpatient primary cancer prevention services for individuals at increased risk have been implemented.

View Article and Find Full Text PDF

Deep-Learning for Rapid Estimation of the Out-of-Field Dose in External Beam Photon Radiation Therapy - A Proof of Concept.

Int J Radiat Oncol Biol Phys

September 2024

Unité Mixte de Recherche (UMR) 1030 Radiothérapie Moléculaire et Innovation Thérapeutique, ImmunoRadAI, Inserm, Université Paris-Saclay, Institut Gustave Roussy, Villejuif, France; Department of Radiation Oncology, Institut Gustave Roussy, Villejuif, France.

Article Synopsis
  • The study investigates the out-of-field dose delivered during external photon beam radiation therapy, as it may lead to a higher risk of second cancers and affect immune system efficiency in radio-immunotherapy treatments.
  • Traditional methods for estimating out-of-field doses are complex and not suitable for clinical use, prompting the exploration of deep learning techniques for more effective dose map prediction.
  • A 3D U-Net model, trained on data from 3,151 pediatric patients, demonstrated promising results in estimating out-of-field doses, achieving low error rates in both training and validation, indicating potential for clinical application.
View Article and Find Full Text PDF

A Monte Carlo virtual source model named PHID (photon from Ion decay) that generates photons emitted in the complex decay chain process of alpha-emitter radionuclides is proposed, typically for use during the simulation of SPECT image acquisition.Given an alpha-emitter radionuclide, the PHID model extracts from Geant4 databases the photon emission lines from all decaying daughters for both isometric transition and atomic relaxation processes. According to a given time range, abundances and activities in the decay chain are considered thanks to the Bateman equations, taking into account the decay rates and the initial abundances.

View Article and Find Full Text PDF

Glioma segmentation based on dense contrastive learning and multimodal features recalibration.

Phys Med Biol

April 2024

University Lyon, INSA Lyon, CNRS, Inserm, IRP Metislab CREATIS UMR5220, U1206, Lyon F-69621, France.

Accurate segmentation of different regions of gliomas from multimodal magnetic resonance (MR) images is crucial for glioma grading and precise diagnosis, but many existing segmentation methods are difficult to effectively utilize multimodal MR image information to recognize accurately the lesion regions with small size, low contrast and irregular shape. To address this issue, this work proposes a novel 3D glioma segmentation model DCL-MANet. DCL-MANet has an architecture of multiple encoders and one single decoder.

View Article and Find Full Text PDF
Article Synopsis
  • - The study compared mortality rates and patient burden among adult ICU patients with respiratory failure due to RSV, COVID-19, seasonal influenza, and H1N1, involving a total of 807 patients.
  • - Patients with RSV had more comorbidities, while those with COVID-19 presented with less severe conditions at admission, indicated by lower SAPS-II and SOFA scores.
  • - Results showed that COVID-19 and H1N1 were linked to higher mortality rates compared to RSV, despite patients with RSV being more severely ill, suggesting a better overall outcome for those affected by RSV and seasonal influenza.
View Article and Find Full Text PDF

Background: Free-running cardiac and respiratory motion-resolved whole-heart five-dimensional (5D) cardiovascular magnetic resonance (CMR) can reduce scan planning and provide a means of evaluating respiratory-driven changes in clinical parameters of interest. However, respiratory-resolved imaging can be limited by user-defined parameters which create trade-offs between residual artifact and motion blur. In this work, we develop and validate strategies for both correction of intra-bin and compensation of inter-bin respiratory motion to improve the quality of 5D CMR.

View Article and Find Full Text PDF

Sex disparities in cardiogenic shock: Insights from the FRENSHOCK registry.

J Crit Care

August 2024

Intensive Cardiac Care Unit, Cardiology department, Rangueil University Hospital, 1 Avenue Jean Poulhes, Toulouse, France; Recherche Enseignement en Insuffisance cardiaque Avancée Assistance et Transplantation (REICATRA), Institut Saint Jacques, CHU de Toulouse, France. Electronic address:

Background: Cardiogenic shock (CS) is the most severe form of acute heart failure. Discrepancies have been reported between sexes regarding delays, pathways and invasive strategies in CS complicating acute myocardial infarction. However, effect of sex on the prognosis of unselected CS remains controversial.

View Article and Find Full Text PDF

On punctate white matter lesions in preterm infants: Is ultrasound diagnosis feasible?

Eur J Paediatr Neurol

March 2024

Service de Néonatalogie et Réanimation Néonatale de la Croix-rousse, Hôpitaux Civils de Lyon, Lyon, France; Service de Néonatalogie et Réanimation Néonatale, Hôpital Femme-Mère-Enfant, Bron, France; EA 4129, Université Claude Bernard Lyon 1, Villeurbanne, France.

Objectives: To observe hyperechoic nodular or punctate white matter lesions (HNPL) in a population of preterm infants using routine cranial ultrasound (cUS), to describe the characteristics of HNPL, and to compare them with punctate white matter lesions (PWML) detected in magnetic resonance imaging (MRI).

Design: Retrospective observational single-center cohort study.

Setting: Level 2B neonatal unit in France.

View Article and Find Full Text PDF
Article Synopsis
  • Spectral computed tomography (CT) is an advanced version of conventional CT that enhances imaging capabilities through dual-energy and photon-counting methods.
  • These methods offer benefits like improved image quality, better material analysis, and enhanced feature measurement compared to traditional CT.
  • Despite these advancements, spectral CT faces challenges like data and image artifacts, leading to a growing use of machine learning techniques to resolve these issues in clinical settings.
View Article and Find Full Text PDF

It Looks Like a Spinal Cord Tumor but It Is Not.

Cancers (Basel)

February 2024

Department of Neuroradiology, East Group Hospital, Hospices Civils de Lyon, 59 Bd Pinel, 69500 Bron, France.

Differentiating neoplastic from non-neoplastic spinal cord pathologies may be challenging due to overlapping clinical and radiological features. Spinal cord tumors, which comprise only 2-4% of central nervous system tumors, are rarer than non-tumoral myelopathies of inflammatory, vascular, or infectious origins. The risk of neurological deterioration and the high rate of false negatives or misdiagnoses associated with spinal cord biopsies require a cautious approach.

View Article and Find Full Text PDF

Introduction: Data on prior use of Tenecteplase versus Alteplase in acute stroke management by mechanical thrombectomy are controversial. Our primary objective was to make a comprehensive comparative assessment of clinical and angiographic efficacy and safety outcomes in a large prospective observational study.

Methods: We included stroke patients who were eligible for intravenous thrombolysis and endovascular thrombectomy between 2019 and 2021, from an ongoing registry in twenty comprehensive stroke centers in France.

View Article and Find Full Text PDF

Pulmonary inflammation decreases with ultra-protective ventilation in experimental ARDS under VV-ECMO: a positron emission tomography study.

Front Med (Lausanne)

February 2024

Service de Médecine Intensive-Réanimation, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France.

Article Synopsis
  • - The study investigates the effects of ultra-protective ventilation (UPV) versus protective ventilation (PV) on lung inflammation in a pig model of acute respiratory distress syndrome (ARDS), using veno-venous extracorporeal membrane oxygenation (VV-ECMO).
  • - It was found that UPV (using lower tidal volumes) reduced lung inflammation and other damaging factors compared to PV, even though both groups had similar levels of oxygenation after ARDS induction.
  • - The research involved detailed imaging and modeling techniques to assess differences in lung conditions between the two ventilation strategies, highlighting the potential benefits of UPV in minimizing lung injury.
View Article and Find Full Text PDF

Ultra-High-Resolution and K-Edge Imaging of Prosthetic Heart Valves With Spectral Photon-Counting CT: A Phantom Study.

Invest Radiol

August 2024

From the University of Lyon, INSA-Lyon, University Claude Bernard Lyon 1, Villeurbanne, France (S.B., F.D.); Department of Cardiovascular and Thoracic Radiology, Louis Pradel Hospital, Hospices Civils de Lyon, Bron, France (S.B., C.M., S.S.-M., L.B., P.D.); University Lyon, INSA-Lyon, University Claude Bernard Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR 5220, Villeurbanne, France (H.L., S.S.-M., L.B., P.D.); Philips Healthcare, Suresnes, France (M.V.); Department of Cardiology, Louis Pradel Hospital, Hospices Civils de Lyon, Bron, France (F.D.); Department of Radiology and Nuclear Medicine, Erasmus Medical Center, Rotterdam, the Netherlands (R.B.); and Department of Cardiac Surgery, Louis Pradel Hospital, Hospices Civils de Lyon, Bron, France (M.P.).

Article Synopsis
  • The study investigates the effectiveness of cardiac computed tomography (CT) in detecting complications of prosthetic heart valves (PHVs), focusing on advancements with photon-counting detectors (PCDs) compared to dual-energy dual-layer CT (DEDL-CT).
  • Researchers used a thoracic phantom with various PHVs and lesions to perform scans, analyzing image quality and artifacts such as blooming and streaks.
  • Results indicate that PCD-CT provides improved image clarity, with thinner metallic structures and significantly reduced artifacts compared to DEDL-CT.
View Article and Find Full Text PDF

Hypoxia plays a central role in tumour radioresistance. Reliable tumour hypoxia imaging would allow the monitoring of tumour response and a more personalized adaptation of radiotherapy planning. Here, we showed a proof of concept of the feasibility and repeatability of relative oxygen extraction fraction (rOEF) mapping of prostate using multi-parametric quantitative MRI (qMRI) achieved for the first time on a 1.

View Article and Find Full Text PDF

Background: The effects of pharmacological therapy on cardiogenic shock (CS) survivors have not been extensively studied. Thus, this study investigated the association between guideline-directed heart failure (HF) medical therapy (GDMT) and one-year survival rate in patients who are post-CS.

Methods And Results: FRENSHOCK (French Observatory on the Management of Cardiogenic Shock in 2016) registry was a prospective multicenter observational survey, conducted in metropolitan French intensive care units and intensive cardiac care units.

View Article and Find Full Text PDF

Early prediction of radiation response by imaging is a dynamic field of research and it can be obtained using a variety of noninvasive magnetic resonance imaging methods. Recently, intravoxel incoherent motion (IVIM) has gained interest in cancer imaging. IVIM carries both diffusion and perfusion information, making it a promising tool to assess tumor response.

View Article and Find Full Text PDF

5-ALA induced PpIX fluorescence spectroscopy in neurosurgery: a review.

Front Neurosci

January 2024

Univ Lyon, INSA-Lyon, Université Claude Bernard Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR 5220, U1294, Lyon, France.

The review begins with an overview of the fundamental principles/physics underlying light, fluorescence, and other light-matter interactions in biological tissues. It then focuses on 5-aminolevulinic acid (5-ALA)-induced protoporphyrin IX (PpIX) fluorescence spectroscopy methods used in neurosurgery (e.g.

View Article and Find Full Text PDF

Similarities and differences of interstitial lung disease associated with pathogenic variants in SFTPC and ABCA3 in adults.

Respirology

April 2024

Department of Respiratory Medicine, National Reference Centre for Rare Pulmonary Diseases, Hospices civils de Lyon, Université Lyon 1, UMR754, INRAE, ERN-LUNG, Lyon, France.

Background And Objective: Variants in surfactant genes SFTPC or ABCA3 are responsible for interstitial lung disease (ILD) in children and adults, with few studies in adults.

Methods: We conducted a multicentre retrospective study of all consecutive adult patients diagnosed with ILD associated with variants in SFTPC or ABCA3 in the French rare pulmonary diseases network, OrphaLung. Variants and chest computed tomography (CT) features were centrally reviewed.

View Article and Find Full Text PDF
Article Synopsis
  • The systematic review evaluated the effectiveness of computer-aided diagnostic systems for detecting dental caries compared to certified dentists, emphasizing the importance of machine learning and deep learning methods in utilizing radiographic databases.
  • After screening 325 articles, 35 studies were found eligible, with bitewing radiographs being the most prevalent and the convolutional neural network being the most utilized model for detection tasks.
  • The methodological quality of the studies varied, with only 49% completeness in reporting practices and notable weaknesses including a monocentric focus and limited testing on external datasets.
View Article and Find Full Text PDF

Anatomy-based correction of kidney PVE on [Formula: see text] SPECT images.

EJNMMI Phys

February 2024

Institut de cancérologie Strasbourg Europe (ICANS), Strasbourg, France.

Background: In peptide receptor radionuclide therapy (PRRT), accurate quantification of kidney activity on post-treatment SPECT images paves the way for patient-specific treatment. Due to the limited spatial resolution of SPECT images, the partial volume effect (PVE) is a significant source of quantitative bias. In this study, we aimed to evaluate the performance and robustness of anatomy-based partial volume correction (PVC) algorithms to recover the accurate activity concentration of realistic kidney geometries on [Formula: see text]Lu SPECT images recorded under clinical conditions.

View Article and Find Full Text PDF

-Related Disorders: From Disease Mechanism to Evidence-Based Treatments.

Annu Rev Genomics Hum Genet

August 2024

INSERM U1151, Institut Necker-Enfants Malades, Paris, France; email:

Recent advances in genetic sequencing are transforming our approach to rare-disease care. Initially identified in cancer, gain-of-function mutations of the gene are also detected in malformation mosaic diseases categorized as -related disorders (PRDs). Over the past decade, new approaches have enabled researchers to elucidate the pathophysiology of PRDs and uncover novel therapeutic options.

View Article and Find Full Text PDF

Predicting cervico-thoraco-lumbar vertebra positions from cutaneous markers: Combining local frame and postural predictors improves robustness to posture.

J Biomech

February 2024

Univ Lyon, Univ Gustave Eiffel, Univ Claude Bernard Lyon 1, LBMC UMR_T9406, F-69622 Lyon, France. Electronic address:

Predictions of vertebra positions from external data are required in many fields like motion analysis or for clinical applications. Existing predictions mainly cover the thoraco-lumbar spine, in one posture. The objective of this study was to develop a method offering robust vertebra position predictions in different postures for the whole spine, in the sagittal plane.

View Article and Find Full Text PDF

Multiple Sclerosis (MS) is an autoimmune disease that combines chronic inflammatory and neurodegenerative processes underlying different clinical forms of evolution, such as relapsing-remitting, secondary progressive, or primary progressive MS. This identification is usually performed by clinical evaluation at the diagnosis or during the course of the disease for the secondary progressive phase. In parallel, magnetic resonance imaging (MRI) analysis is a mandatory diagnostic complement.

View Article and Find Full Text PDF

In a 2021 paper, we delved into the details of delay-sum beamforming (DAS) in high-frame-rate ultrasound for medical imaging [1]. We also proposed a simple and fast method of determining an f-number, which is based on the directivity of the transducer elements. In their comment, Martin F.

View Article and Find Full Text PDF