questionsmedicales.fr
Équipement et fournitures
Équipement et fournitures pour les applications des radiations
Lasers
Lasers : Questions médicales fréquentes
Termes MeSH sélectionnés :
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"description": "Comment les lasers sont-ils utilisés en diagnostic médical ?\nQuels types de lasers sont utilisés pour le diagnostic ?\nLes lasers peuvent-ils détecter des cancers ?\nQuel est le rôle des lasers en ophtalmologie ?\nLes lasers aident-ils à diagnostiquer des maladies de la peau ?",
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"@type": "Question",
"name": "Comment les lasers sont-ils utilisés en diagnostic médical ?",
"position": 1,
"acceptedAnswer": {
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"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."
}
}
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}
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To investigate the role of diffusion tensor imaging (DTI) of optic pathway in patients with idiopathic intracranial hypertension (IIH)....
This study included 41 IIH patients and 22 controls. They underwent DTI of the optic nerve (ON) and optic radiation (OR). Their fractional anostrophy (FA) and mean diffusivity (MD) were calculated by ...
The optic nerve mean FA and MD of patients for reviewer-1 were 0.21 ± 0.047 and 2.189 ± 0.52 ×10...
Our findings suggest that, IIH is associated mainly with pre-chiasmatic or ON involvement rather than post-chiasmatic parenchymal or OR involvement. DTI MD and FA parameters of the ON may be a reliabl...
Taekwondo, which is the most preferred sport among the martial arts, is known to improve individuals physically, spiritually and mentally. The aim of this study is to reveal the effect of teakwondo sp...
Total brain volume and volumes of white matter, gray matter, frontal lobe, precentral gyrus, corticospinal tract, basal nuclei, postcentral gyrus, hippocampus and amigdala and the ratio of these volum...
An increase in total brain volume, gray matter, frontal lobe and precentral gyrus volume in athletes was associated with taekwondo training. When the ratio of brain parts to total brain volume was exa...
The increase in the volume of gray matter, frontal lobe, postcentral gyrus and corticospinal tract together with the brain volume shows that taekwondo exercise contributes to physical, spiritual and m...
The peripheral course of the trigeminal nerves is complex and spans multiple bony foramen and tissue compartments throughout the face. Diffusion tensor imaging of these nerves is difficult due to the ...
We prospectively acquired imaging data from six healthy adult participants with a 3.0-Tesla system, including T2-weighted short tau inversion recovery with variable flip angle (T2-STIR-SPACE) and read...
All nerves in all subjects were tracked beyond the trigeminal ganglion. Tracts in the inferior alveolar and ophthalmic nerve exhibited the strongest signal and most consistently reached the most dista...
This work demonstrates a method for consistently identifying and tracking the major nerve branches of the trigeminal nerve with diffusion tensor imaging....
Chronic substance use and its effects on brain function and structure has long been of interest to clinicians and researchers. Prior cross-sectional comparisons of diffusion tensor imaging (DTI) metri...
A total of 46 participants (21 healthy controls, 25 chronic cocaine users) were recruited from the Richmond, Virginia metropolitan area. Information regarding past and current substance use was collec...
Consistent with previous DTI studies, significant differences were found between fractional anisotropy (FA) and axial diffusivity (AD) CocUD and controls, with CocUD showing lower FA and AD in the rig...
These data align with previously reported declines in white matter coherence in chronic cocaine users. However, it is less clear whether comorbid alcohol consumption results in an additive deleterious...
Diffusion tensor imaging (DTI) has provided great insights into the microstructural features of the developing brain. However, DTI images are prone to several artifacts and the reliability of DTI scal...
Lewis-Sumner syndrome (LSS) is an atypical variant of chronic inflammatory demyelinating polyneuropathy characterized by an asymmetric sensory-motor neuropathy with multifocal distribution. The diagno...
The understanding of white matter (WM) was revolutionized by the emergence of tractography based on diffusion tensor imaging (DTI). Currently, DTI simulations are implemented in preoperative planning ...
WM surgical damage was preoperatively simulated by creating a 3-dimensional volume representing the endoscope or the surgical trajectory. This volume was used as an additional region of interest in th...
The preoperative and postoperative DTI studies of 30 patients undergoing various neurosurgical approaches were processed. The correlation between simulated injuries and postoperative studies was high ...
Presurgical simulation of WM fascicles based on DTI is consistent with postoperative DTI studies. These findings require further validation by neurophysiological and clinical correlation....
Diffusion tensor imaging (DTI) allows the in vivo imaging of pathological white matter alterations, either with unbiased voxel-wise or hypothesis-guided tract-based analysis. Alterations of diffusion ...
There has been growing attention on the effect of COVID-19 on white-matter microstructure, especially among those that self-isolated after being infected. There is also immense scientific interest and...
Dynamic diffusion magnetic resonance imaging (ddMRI) metrics can assess transient microstructural alterations in tissue diffusivity but requires additional scan time hindering its clinical application...
To determine whether a diffusion gradient table can simultaneously acquire data to estimate dynamic and diffusion tensor imaging (DTI) metrics....
Prospective....
Seven healthy subjects, 39 epilepsy patients (15 female, 31 male, age ± 15)....
Two-dimensional diffusion MRI (b = 1000 s/mm...
Fifteen direction DTI was repeated twice for within-session test-retest measurements in healthy subjects. Bland-Altman analysis computed bias and limits of agreement for DTI metrics using test-retest ...
Bland-Altman and ICC analysis using a P-value of 0.05 for statistical significance....
Correlations of mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) were strong and significant in gray (ICC > 0.95) and white matter (ICC > 0.95) between standard vs. nested cu...
A nested cubes diffusion gradient table produces tensor-based and dynamic diffusion measurements in a single acquisition....
2 TECHNICAL EFFICACY: Stage 1....