View clinical trials related to Magnetic Resonance Imaging.
Filter by:This study prospectively included 178 patients with bladder neoplastic lesions who planned to undergo surgery (with or without preoperative neoadjuvant chemotherapy). Inclusion criteria: Patients with pathologically confirmed bladder cancer after radical or partial cystectomy or TURBT (< 2 weeks between surgical resection and imaging). Exclusion criteria: 1) Prior history of chemotherapy and/or radiotherapy; 2) No surgical resection; 3) The interval between surgical resection and imaging examination is > 2 weeks; 4) Obvious artifacts; 5)MRI scan contraindications. All subjects underwent pelvic MRI. Data was collected using a Siemens VIDA 3TMR scanner (Siemens Healthcare, Erlangen, Germany). All subjects underwent standardized scanning protocols. The obtained images are post-processed and the experimental results are analyzed statistically.
To investigate the intervention effect of transcranial alternating current stimulation(tACS) on anxiety symptoms and somatic symptoms in patients with anxiety disorder and its underlying neural mechanism by MRI.
The goal of the current project is to explore and develop the technical feasibility of non-invasive imaging of the human musculoskeletal system and head with the first 7T MR scanner with a CE mark to identify areas where the higher field promises significant benefits in qualitative image quality. For a subset of the planned exams, state-of-the art 7T or 3T images will be used as standard of reference to comparatively gauge the qualitative image quality of the investigational 7T images.
The goal of this observational study is to explore the application of temporal diffusion spectroscopy MRI in head and neck squamous cell carcinoma (HNSCC). The main questions it aims to answer are: - If the quantitative parameters of temporal diffusion spectroscopy MRI can predict the comprehensive positive score (CPS) of pathological PD-L1 expression in HNSCC? - If the quantitative parameters of temporal diffusion spectroscopy MRI can predict the efficacy of neoadjuvant therapy in HNSCC? Participants will receive head and neck MRI, including T2WI, T1WI, diffusion-weighted imaging (DWI), oscillating gradient spin echo (OGSE) and pulsed gradient spin echo (PGSE) sequence before and after neoadjuvant therapy. There is not a comparison group in our study.
How to optimally stimulate the developing brain is still unclear. Executive functions (EF) exhibited substantially stronger far transfer effects in children who learned to play a musical instrument than in children who acquired other arts. What is crucially lacking is a large-scale, long-term genuine randomized controlled trial (RCT) in cognitive neuroscience, comparing musical instrumental training (MIP) to another art form and a control group. Collected data of this proposal will allow, using machine learning, to build a data-driven multivariate model of children's interconnected brain and EF development over the first 2 years of their academic curriculum (6-8 years), with or without music or other art training.
Background: Magnetic resonance imaging (MRI) has been known for almost forty years to generate fear and anxiety. Children may become restless during scanning, which results in movement artifacts requiring the MRI to be repeated with sedation. Very few studies seemed to have looked at the effect of immersive virtual reality (IVR) on anxiety in children scheduled for an MRI. Objectives: The aims of this study are two-fold: 1- to address feasibility and acceptability of a pre-procedural immersive VR (IVR) game preparation for anxiety management during MRIs and 2- to examine the efficacy of IVR game preparation compared to usual care for the management of procedural anxiety during MRIs. Methods: This study will first consist of a field test phase with 10 participants, aged 7 to 17 years old, to address the feasibility and acceptability of the use of virtual reality. Following the field test, a RCT will be completed using a parallel design with two groups: 1) experimental group (pre-procedural IVR game preparation), 2) usual care group (standard care as per radiology department's protocol) in an equal ratio of 49 participants per group for a total of 98 participants. Recruitment will be done at CHU Sainte-Justine's, Quebec, Canada. The experimental group will receive a pre-procedural IVR game preparation (IMAGINE) that offers an immersive simulation of the MRI. Participants will complete a questionnaire to assess the acceptability, feasibility and incidence of side effects related to the intervention and the biofeedback device. Data collected will include socio-demographic, clinical characteristics, measures of anxiety with the French-Canadian version of the State-Trait Anxiety Inventory for Children (STAIC-F) and the Child Fear Scale (CFS, 0-4). Physiological biomarkers of anxiety such as alpha-amylase and other markers such as heart rate and head deviation will also be measured. Measures of healthcare professionals, parents, and participants' level of satisfaction will also be collected. Analyses will be carried out according to the intention-to-treat principle, with a significance level (α) of 0.05. Discussion: Our study provides an alternative method for anxiety management to better prepare patients for an awake MRI. It will guide future medical practice by providing evidence-based knowledge on a non-pharmacological therapeutic modality for anxiety management in children scheduled for an MRI.
The aim of this project is to investigate the multimodal magnetic resonance brain imaging changes in adolescents with major depressive disorder (MDD) before and after electroconvulsive therapy. Development of a predictive model for the efficacy of electroconvulsive therapy in adolescent MDD.
The goal of this clinical trial is to test a new type of magnetic brain stimulation in patients with persistent post-concussive symptoms. Participants will undergo detailed MRI scans before and after 30 treatment sessions (of 3-10 minutes each). The main questions the study aims to answer are: - Will this new type of treatment result in fewer symptoms and better daily functioning? - What are the effects of this treatment on brain functioning?
Brain blood flow will be measured during exercise using magnetic resonance imaging.
This is a monocentric, single blind, interventional, single arm study. It is designed to compare the rates of detection of hepatocellular carcinoma (HCC) by ultrasound (US) used in clinical routine vs. abbreviated magnetic resonance imaging (AMRI). The hypothesis is that dynamic AMRI with extracellular contrast agent injection has a higher patient-level detection rate of HCC than screening US and non-contrast AMRI. Interested and eligible patients will be enrolled and undergo HCC screening rounds including US +/- contrast-enhanced US (clinical routine) and screening MRI within the same week bi-annually.