Titre : Lasers

Lasers : Questions médicales fréquentes

Termes MeSH sélectionnés :

Diffusion Tensor Imaging
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présentent-elles plus de risques avec les lasers ?\nLes femmes enceintes peuvent-elles utiliser des traitements au laser ?\nLes traitements au laser sont-ils sûrs pour les personnes âgées ?", "url": "https://questionsmedicales.fr/mesh/D007834?mesh_terms=Diffusion+Tensor+Imaging&page=4#section-facteurs de risque" } ] }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Comment les lasers sont-ils utilisés en diagnostic médical ?", "position": 1, "acceptedAnswer": { "@type": "Answer", "text": "Les lasers permettent des examens d'imagerie comme la tomographie par cohérence optique." } }, { "@type": "Question", "name": "Quels types de lasers sont utilisés pour le diagnostic ?", "position": 2, "acceptedAnswer": { "@type": "Answer", "text": "Les lasers à diode et les lasers à argon sont couramment utilisés pour divers diagnostics." } }, { "@type": "Question", "name": "Les lasers peuvent-ils détecter des cancers ?", "position": 3, "acceptedAnswer": { "@type": "Answer", "text": "Oui, certains lasers sont utilisés pour détecter des cellules cancéreuses par fluorescence." } }, { "@type": "Question", "name": "Quel est le rôle des lasers en ophtalmologie ?", "position": 4, "acceptedAnswer": { "@type": "Answer", "text": "Les lasers sont utilisés pour traiter des maladies oculaires comme le glaucome et la cataracte." } }, { "@type": "Question", "name": "Les lasers aident-ils à diagnostiquer des maladies de la peau ?", "position": 5, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les lasers peuvent être utilisés pour évaluer des lésions cutanées et des mélanomes." } }, { "@type": "Question", "name": "Quels symptômes peuvent nécessiter un traitement au laser ?", "position": 6, "acceptedAnswer": { "@type": "Answer", "text": "Des symptômes comme des lésions cutanées, des douleurs oculaires ou des troubles de la vision." } }, { "@type": "Question", "name": "Les lasers peuvent-ils soulager la douleur ?", "position": 7, "acceptedAnswer": { "@type": "Answer", "text": "Oui, la thérapie au laser peut réduire la douleur dans certaines conditions musculo-squelettiques." } }, { "@type": "Question", "name": "Quels symptômes cutanés sont traités par laser ?", "position": 8, "acceptedAnswer": { "@type": "Answer", "text": "Les cicatrices, les taches de vieillesse et les varices peuvent être traités par laser." } }, { "@type": "Question", "name": "Les lasers peuvent-ils traiter l'acné ?", "position": 9, "acceptedAnswer": { "@type": "Answer", "text": "Oui, certains lasers ciblent les glandes sébacées pour réduire l'acné et ses cicatrices." } }, { "@type": "Question", "name": "Quels symptômes oculaires sont traités par laser ?", "position": 10, "acceptedAnswer": { "@type": "Answer", "text": "Les symptômes comme la vision floue ou les cataractes peuvent être traités par laser." } }, { "@type": "Question", "name": "Comment prévenir les effets secondaires des traitements au laser ?", "position": 11, "acceptedAnswer": { "@type": "Answer", "text": "Suivre les recommandations du médecin et utiliser des crèmes apaisantes après le traitement." } }, { "@type": "Question", "name": "Les lunettes de protection sont-elles nécessaires lors de traitements au laser ?", "position": 12, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des lunettes de protection sont essentielles pour éviter les dommages oculaires." } }, { "@type": "Question", "name": "Comment protéger la peau après un traitement au laser ?", "position": 13, "acceptedAnswer": { "@type": "Answer", "text": "Évitez l'exposition au soleil et utilisez des écrans solaires pour protéger la peau traitée." } }, { "@type": "Question", "name": "Quelles précautions prendre avant un traitement au laser ?", "position": 14, "acceptedAnswer": { "@type": "Answer", "text": "Évitez les anticoagulants et informez le médecin de toute condition médicale préexistante." } }, { "@type": "Question", "name": "Les traitements au laser nécessitent-ils des soins post-traitement ?", "position": 15, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des soins appropriés sont nécessaires pour favoriser la guérison et éviter les infections." } }, { "@type": "Question", "name": "Quels traitements au laser existent pour la peau ?", "position": 16, "acceptedAnswer": { "@type": "Answer", "text": "Les traitements incluent la resurfacing, l'épilation et le traitement des varices." } }, { "@type": "Question", "name": "Comment les lasers sont-ils utilisés en dentisterie ?", "position": 17, "acceptedAnswer": { "@type": "Answer", "text": "Les lasers traitent les caries, les maladies des gencives et blanchissent les dents." } }, { "@type": "Question", "name": "Les lasers sont-ils efficaces pour la correction de la vue ?", "position": 18, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les lasers comme le LASIK corrigent la myopie, l'hypermétropie et l'astigmatisme." } }, { "@type": "Question", "name": "Quels types de lasers sont utilisés en chirurgie ?", "position": 19, "acceptedAnswer": { "@type": "Answer", "text": "Les lasers CO2 et YAG sont couramment utilisés pour des procédures chirurgicales précises." } }, { "@type": "Question", "name": "Les traitements au laser sont-ils douloureux ?", "position": 20, "acceptedAnswer": { "@type": "Answer", "text": "La plupart des traitements au laser sont peu douloureux, mais une anesthésie locale peut être utilisée." } }, { "@type": "Question", "name": "Quelles sont les complications possibles des traitements au laser ?", "position": 21, "acceptedAnswer": { "@type": "Answer", "text": "Les complications peuvent inclure des brûlures, des cicatrices ou des infections." } }, { "@type": "Question", "name": "Les traitements au laser peuvent-ils causer des changements de pigmentation ?", "position": 22, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des changements temporaires ou permanents de pigmentation peuvent survenir." } }, { "@type": "Question", "name": "Comment gérer les complications après un traitement au laser ?", "position": 23, "acceptedAnswer": { "@type": "Answer", "text": "Consultez un médecin pour évaluer les complications et suivre un traitement approprié." } }, { "@type": "Question", "name": "Les complications sont-elles fréquentes avec les lasers ?", "position": 24, "acceptedAnswer": { "@type": "Answer", "text": "Les complications sont rares si le traitement est effectué par un professionnel qualifié." } }, { "@type": "Question", "name": "Les infections sont-elles un risque après un traitement au laser ?", "position": 25, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les infections peuvent survenir, surtout si les soins post-traitement ne sont pas suivis." } }, { "@type": "Question", "name": "Quels facteurs augmentent le risque de complications au laser ?", "position": 26, "acceptedAnswer": { "@type": "Answer", "text": "Les antécédents de cicatrisation anormale et les maladies cutanées augmentent le risque." } }, { "@type": "Question", "name": "L'âge influence-t-il les résultats des traitements au laser ?", "position": 27, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les résultats peuvent varier selon l'âge, avec des peaux plus jeunes réagissant mieux." } }, { "@type": "Question", "name": "Les peaux foncées présentent-elles plus de risques avec les lasers ?", "position": 28, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les peaux foncées peuvent avoir un risque accru de changements de pigmentation." } }, { "@type": "Question", "name": "Les femmes enceintes peuvent-elles utiliser des traitements au laser ?", "position": 29, "acceptedAnswer": { "@type": "Answer", "text": "Il est généralement recommandé d'éviter les traitements au laser pendant la grossesse." } }, { "@type": "Question", "name": "Les traitements au laser sont-ils sûrs pour les personnes âgées ?", "position": 30, "acceptedAnswer": { "@type": "Answer", "text": "Oui, mais une évaluation médicale est nécessaire pour déterminer les risques individuels." } } ] } ] }

Sources (10000 au total)

Advanced muscle imaging in adolescent elite rowers utilizing diffusion tensor imaging: Association of imaging findings with stroke typology.

Muscular overuse injuries are a common health issue in elite athletes. Changes in the muscular microenvironment can be depicted by Diffusion Tensor Imaging (DTI). We hypothesize that the biomechanics ... Twenty-two male elite rowers (12 sweep, 10 scull rowers) with a mean age of 15.8 ± 1.2 years underwent 3-Tesla MRI of the lumbar spine 6 hours after cessation of training. Apparent diffusion coefficie... ADC values in the erector spinae and multifidus muscle were significantly higher (p = 0.039) and FA values significantly lower (p < 0.001) in sweep rowers compared to scull rowers. There was no signif... Our DTI results show that lumbar spine muscle diffusivity is higher in sweep rowers than in scull rowers. Altered muscle diffusivity is suggestive of microscopic tissue disruption and might be attribu...

Evaluating the renal mild tubulointerstitial damage and renal function in IgAN patients: a comparative study based on diffusion kurtosis imaging and diffusion tensor imaging.

To compare the performance of 3.0 T magnetic resonance diffusion kurtosis imaging (DKI) and diffusion tensor imaging (DTI) in evaluation of the degree of tubulointerstitial damage and renal function i... Both DKI and DTI were performed in 40 IgAN patients and 17 healthy volunteers. IgAN patients were divided into two groups according to tubulointerstitial lesion score: Mild injury group, n = 24; Moder... Cortical MK, Kr, Da and parenchymal Ka significantly differed among three groups (P < 0.05). Cortical MK, Kr, Ka were negatively correlated with estimated glomerular filtration rate (eGFR) (MK: r = - ... Compared with DTI, DKI was more sensitive and accurate to probe the renal function and the tubulointerstitial damage of IgAN, especially the mild tubulointerstitial damage....

Role of diffusion tensor imaging in neurological prognostication in spinal tuberculosis - A prospective pilot study.

The current study aims to explore the correlation between the Diffusion Tensor Imaging (DTI) indices and neurological status of individuals with TB spine with neurological deficit (TBSND). Further, fa... The current study included 51 individuals with TBSND undergoing posterior instrumentation and posterolateral decompression. All individuals underwent DTI scanning at the site of compression and at a n... The FA values at the compressed segment were significantly lower while the ADC values were significantly higher when compared with the non-compressed levels. Pre-operative motor and total neurological... Higher FA indices along with lower age constitute independent predictors for faster neurological recovery following decompression. FA values correlate with the neurological status of individuals with ...

Diffusion Tensor Imaging in Boys With Adrenoleukodystrophy: Identification of Cerebral Disease and Association With Neurocognitive Outcomes.

Childhood cerebral adrenoleukodystrophy (C-ALD) is a severe inflammatory demyelinating disease that must be treated at an early stage to prevent permanent brain injury and neurocognitive decline. In s... In this retrospective cohort study, we analyzed high-resolution anatomical MRI, DTI, and neurocognitive assessments from boys with C-ALD undergoing HCT at the University of Minnesota between 2011 and ... Among patients with NL-ALD (n = 14), stable or increasing FA, stable AD, and stable or decreasing RD and MD were generally observed during the 1-year study period across all ROIs. In comparison, patie... DTI was sensitive to lesion presence and severity as well as clinical neurocognitive effects of C-ALD. DTI metrics quantify C-ALD even at an early stage....

A systematic review of repeatability and reproducibility studies of diffusion tensor imaging of cervical spinal cord.

Diffusion tensor imaging (DTI) techniques are being studied as a possible diagnostic and predictive tool for the evaluation of cervical spinal cord disease. This systematic review aims to evaluate the... A search in the PubMed, Scopus, Web of Science and Ovid electronic databases was conducted for articles published between January 1990 and February 2022 that related to the repeatability and reproduci... A total of 11 studies were included and assessed for different characteristics, including sample size,(3-34) re-test time interval (<1 h to >3 months), test-retest reproducibility scores and acquisiti... This study revealed that the application of DTI and its related measures in a clinical setting in the assessment of cervical spinal cord changes is feasible and reproducible. However, cervical spinal ... DTI with its parametric maps provide broad evaluation of the tissue structure of axonal white matter and are being studied as a possible diagnostic and predictive tool for the assessment of cervical s...

Reproducibility of automated calculation technique for diffusion tensor image analysis along the perivascular space.

The method of diffusion tensor image analysis along the perivascular space (DTI-ALPS) was gathering attention to evaluate the brain's glymphatic function or interstitial fluid dynamics. However, to th... This study included 23 participants, including 2 with Alzheimer's disease, 15 with mild cognitive impairment, and 6 with cognitive normals. Scan and rescan data of diffusion magnetic resonance images ... The absolute difference in ALPS-index values between scan and rescan was larger in the ALPS index than in the vALPS index by approximately 0.6% as the relative difference. Cohen's d for the left and r... The vALPS index based on DTI-ALPS maintaining tensor vector orientation information has higher reproducibility than the ALPS index. This result encourages a multisite study on the ALPS index with a la...

The comparison of diffusion tensor imaging in human hearts between 1.5 T and 3.0 T.

The aim was to compare the diffusion tensor imaging (DTI) indices derived from human hearts between 1.5 T and 3.0 T scanners. Additionally, the reproducibility of DTI indices was assessed between 1.5 ... A total of 18 ex-vivo hearts were derived from patients who underwent heart transplantation. The DTI schemes were performed at 1.5 T and 3.0 T, respectively. Then, the same slices from each ex-vivo he... No significant differences (all P > 0.05) were found in the DTI indices between 1.5 T and 3.0 T scanners. Interestingly, the ICC of all DTI indices was relatively lower with a low b-value. The reprodu... The DTI indices of ex-vivo human hearts between 1.5 T and 3.0 T scanners had no significant differences. The consistency of DTI indices needed caution using a low b-value with different field strength...

A diffusion tensor imaging study in schizophrenia patients with clozapine induced obsessive compulsive symptoms.

The aim of this study was to evaluate brain connectivity by diffusion tensor imaging (DTI) in schizophrenia patients with clozapine-induced obsessive compulsive symptoms (OCS).... Eighteen schizophrenia patients, nine of which had clozapine-induced OCS (Clz-OCS (+)), 9 without OCS (Clz-OCS (-)) and 9 healthy controls were included. Psychopathology was evaluated with Positive an... Tract-Based Spatial Statistics based comparison of DTI revealed lower fractional anisotropy in the genu of corpus callosum (CC), right cingulum, left frontal white matter (WM) in the Clz-OCS (+) group... WM integrity in several pathways such as cortico-striato-thalamo-cortical circuitry and orbito-frontal tracts seems to be affected differently in patients with Clz-OCS (+). Different neuroplastic effe...

Diffusion tensor imaging studies on subjects with suicidal thoughts and behaviors: A descriptive literature review.

Globally, suicide represents the second leading cause of death in young people aged 15-29 years for both sexes, after traffic accidents. Suicide occurs not only in high-income countries, in high-incom... This review was conducted on studies focused on white matter alterations in people who have attempted or thought about suicide. We searched PubMed and Scopus databases and screened references of inclu... White matter alterations in suicidal behaviors were found in the prefrontal cortex, orbitofrontal cortex, internal capsule, corpus callosum, and default mode networks, which are critical cerebral area... White matter alteration in cerebral areas involving high cognitive process and emotional regulation to confer a heightened vulnerability for suicidal behavior. Suicide is a complex process ranging fro...

Utility of diffusion tensor imaging in differentiating benign from malignant hepatic focal lesions.

To assess the diagnostic accuracy of diffusion tensor imaging (DTI) in the characterization of hepatic focal lesions (HFLs) and compare it to diffusion-weighted imaging (DWI).... Prospective analysis was done for 49 patients (23 male and 26 female) with 74 HFLs who underwent dynamic MRI, DWI, and DTI. Apparent diffusion coefficient (ADC) values from DWI, fractional anisotropy ... The ADC, MD, and FA at cutoff values of ≤ 1.17 × 10... MD and FA of DTI are non-invasive, very good, and excellent discriminators superior to ADC measured by DWI for the differentiation of HFLs.... • The ADC, MD, and FA at cutoff values of ≤ 1.17 × 10...