View clinical trials related to Magnetic Resonance Imaging.
Filter by:Study the therapeutic effect and potential neural mechanisms of cerebellar iTBS mode transcranial magnetic stimulation on Alzheimer's disease patients through MRI and EEG.
Tumor hypoxia is one of the physiological factors for treatment resistance and likely contributes to poor overall survival among patients with head and neck cancer (HNC). Identifying hypoxic features of HNC may allow the personalizing treatment plan. The investigators propose multiparametric Hypoxia MR (HMR) imaging using diffusion, perfusion, and oxygenation as non-invasive, in-vivo imaging components of a hypoxia phenotype. Assessing the hypoxia phenotypes' expression will be critically important for characterizing and predicting CRT response among patients with advanced HNC. A prospective cohort study will be conducted used multiparametric MR (MPMR) imaging correlated with treatment response assessed by 3 months fluorodeoxyglucose-positron emission tomography (FDG-PET). The image analysis approach will be developed to incorporate FDG-PET and quantitative MRI characteristics of tumor (ADC, oxygen-enhanced T1 and T2* maps, and volume transfer constant (Ktrans) to facilitate 3D visualization of multiparametric information. This proposed study's overarching goal is to develop and validate multiparametric HMR imaging using 18F - (fluoromisonidazole) FMISO-PET and immunohistochemistry (IHC) as the standard of references.
This is a prospective, randomized, open-label, active drug controlled clinical trial that aims to compare the effects of henagliflozin or metformin on myocardial tissue level characteristics in type 2 diabetes patients with obesity. Eligible subjects with type 2 diabetes before randomisation and fulfilling all of the inclusion criteria and none of the exclusion criteria will be randomised in a 1:1 ratio to henagliflozin 10 mg once a day or metformin 1000 mg twice a day and treated for 24 weeks. The study includes five visits.
Cesarean section scar defects (CSDs) are one of the long-term complications following cesarean section. They can be detected by transvaginal sonography, hysterosalpingography, sonohysterography and magnetic resonance imaging (MRI). Hysteroscopy is frequently used in evaluating endometrial disease. However, the description of CSDs by hysteroscopy is very limited. Only a few papers about hysteroscopy evaluation have been published. This is an exploratory study to compare hysteroscopic findings with the clinical outcomes of vaginal repair of CSDs.
Consecutive patients accessing the emergency department with suspected stroke dispatch will be recruited at 3 study units: 1) ASL Abruzzo 1, hospitals of L'Aquila and Avezzano; 2) ASL Abruzzo 2, hospital of Chieti; 3) IRCCS Humanitas Research Hospital of Milan. Anonymized clinical and low-field (LF) MRI data as well as conventional neuroimaging data will be independently assessed by external units (Università Politecnica delle Marche and Policlinico di Messina, respectively). Both units will independently adjudicate the best treatment option, while the latter will also provide historical MRI data of stroke patients to develop artificial intelligence algorithms facilitating LF-MRI images interpretation (Libera Università di Bolzano). Agreement with conventional neuroimaging will be evaluated at different time points (hyperacute, acute -24 h, subacute -72 h, discharge, chronic -4 weeks). Further investigations will include feasibility study to develop an ambulance (mobile stroke unit) equipped with LF-MRI and cost-effectiveness analysis of LF-MRI. This trial will provide necessary data to validate the use of LF-MRI in the acute stroke care.
Endometriosis is a frequent pathology with an estimated prevalence of 10% of women of childbearing age. There is no exact correspondence between the symptoms described by the patients and the severity of the lesions, which makes clinical diagnosis difficult. It therefore seems important to improve the complementary examinations available to make the diagnosis more precise and to better study the effectiveness of the treatments implemented. The clinical examination and per-surgical findings of patients with deep pelvic endometriosis show a clear decrease in the mobility of the pelvic organs in relation to each other, but few studies have looked at this mobility, which could however have an implication in explaining the pathophysiology of the disease and the symptomatology of the patients, as well as in the detection of lesions preoperatively. The persistence of hypo-mobility could also help to understand treatment failures.
A clinical study to investigate the absorption, metabolism and excretion of [14C] TQ-B3525 in Chinese adult male healthy subjects, aiming to quantitatively analyze the total radioactivity in the excreta of male healthy subjects after oral administration of [14C] TQ-B3525, obtain the data of human radioactive excretion rate and main drainage routes, investigate the distribution in whole blood and plasma, the distribution in plasma and the pharmacokinetics of total radioactivity in plasma, and identify the main metabolites, To determine the main biotransformation pathway and obtain the pharmacokinetic parameters of TQ-B3525 and its metabolites in plasma.
To examine the correlation between the occurrence of adenomyosis and the outcome of vaginal repair of cesarean section scar defects (CSD), women with CSD will be enrolled in this retrospective observational cohort study. According to preoperative magnetic resonance imaging (MRI) findings, patients will be divided into two groups, the adenomyosis group and the non-adenomyosis group. They all will have vaginal excision and suture of CSD and will be required to undergo examinations at 3- and 6-months after surgery. Preoperative and postoperative clinical information will be collected.
An assessment of the feasibility of structural and functional magnetic resonance imaging (MRI) brain scans in older people who have recovered from and older people who never had delirium after hip fracture surgery
To investigate the neural mechanism of Magnetic resonance-guided focused ultrasound (MRgFUS) Pallidothalamic Tractotomy in Parkinson's disease through multi-model MRI, and identify imaging biomarkers for triaging candidates and predicting the clinical outcomes. Parkinson's disease (PD) is the second most progressive neurodegenerative disease with many motor and non-motor symptoms, which brings heavy burden to the family and the society. MRgFUS pallidothalamic tractotomy allows to address all symptoms of PD without skull opening and with very limited tissue ablation, but with varying effectiveness. The unknown pathogenesis of PD has greatly contributed to this variance. Therefore, in order to optimize the clinical application of MRgFUS pallidothalamic tractotomy, it is important to reveal the pathogenesis of Parkinson's disease by using multiple modality MRI methods, and identify imaging biomarkers to triage suitable candidates and predict clinical outcomes.