Articles tagged with Magnetic Resonance Imaging
A study published in The Lancet found that covert strokes are more common than overt strokes in people over 65 who have surgery, with one in 14 patients experiencing a silent stroke. This increases the risk of cognitive decline and other complications, affecting up to three million people globally.
A recent NIH study found that chronic active lesions in the brain, marked by dark rimmed spots, are a hallmark of more aggressive and disabling forms of multiple sclerosis. The study suggests that these lesions may play a role in progressive MS and offers hope for developing new treatments.
This review analyzes the diagnostic value of ultrasound in evaluating 7 major arthritic conditions. Ultrasound is found to be effective in delineating characteristic features for each condition, making it a convenient and accurate imaging modality.
A Belgian team developed a two-in-one contrast agent for medical imaging, combining MRI and photoacoustic imaging techniques. The bimodal probe enhances sensitivity while minimizing risks for patients.
Japanese scientists have developed a new method to construct 3D models from 2D images, overcoming several limitations in current methods. The approach uses non-rigid registration and blending of rigid transforms to create accurate 3D reconstructions of human embryos with high success.
The brains of individuals with exceptional general knowledge exhibit efficient structural networking, allowing for better information integration and recall. This is evident in a recent study where participants with more efficient fibre networks scored higher on the Bochum Knowledge Test.
A new imaging technique uses magnetic properties of the heart muscle to quantify changes in blood flow, identifying areas impacted by coronary atherosclerosis. This method eliminates the need for contrast agents or pharmacological stress tests, offering a faster and potentially safer diagnostic option for CAD patients.
A portable, noninvasive fluid monitoring device has been developed using nuclear magnetic resonance technology, providing accurate measurements of leg fluid buildup in patients with end-stage kidney disease. The device's portability and ease-of-use could enable clinicians to track fluid buildup at the bedside, improving patient care.
A new study has found a significant increase in the use of computed tomography (CT) scans during pregnancy in the United States over the last two decades, exposing mothers and fetuses to ionizing radiation. The study suggests that alternative methods without radiation should be considered whenever possible.
Wearing magnetic eyelashes during MRI can create substantial artifact, obscuring entire phantom. The eyelashes detached from the phantom after scanning, attracted to each other due to friction and adhesion.
Researchers studied cortical thickness in 43 infants over two years, finding it increases rapidly until 14 months. Each developmental region of thickness was functionally important, with some continuing to thicken beyond 2 years.
Researchers found that measuring the distance between the tibial tubercle and trochlear groove using MRI can accurately predict knee instability. A TT-TG distance of 13 mm is identified as a guideline for identifying patients at risk, with further study planned to explore contributing factors.
A recent study suggests that arthroscopy is a more accurate method than magnetic resonance imaging (MRI) for staging chondral injuries in the knee. The study found that arthroscopy was correct in 47% of cases, while MRI had a specificity and sensitivity of 73% and 42%, respectively.
A new international consensus document provides guidelines for the conduct of magnetic resonance imaging studies after a myocardial infarction. The main outcome measure recommended is absolute infarct size, with scanning timing between 3 and 7 days post-infarction.
A comprehensive study of MS patients found that gadolinium deposition occurs early in the disease, but does not have a clinical impact. However, male patients showed more deposition than female patients, which may be related to dosage based on weight.
Researchers at QNS have developed a technique to visualize the magnetic field of single atoms with unprecedented resolution. This breakthrough enables the mapping of spin distribution in complex structures such as molecules and magnetic materials.
A new mini MRI scanner uses 'magic angle' effect to visualize knee structures, helping diagnose ligament and tendon damage. The technology could reduce NHS waiting times for MRI scans and improve treatment outcomes.
A study by Goethe University Frankfurt has demonstrated the safety and efficacy of non-invasive magnetic resonance imaging (MRI) in guiding therapy decisions for patients with stable chest pain and coronary heart disease. MRI measurements were found to be as safe as cardiac catheterization, with reduced need for invasive procedures.
A 40-minute MRI scan has been shown to guide treatment decisions for patients with angina, resulting in fewer hospital stays and procedures. The MR-INFORM trial found similar patient outcomes between those who received the standard invasive angiography and those whose treatment was dictated by their MRI scan.
A recent study published in the Journal of Hepatology found that a low-carb Mediterranean diet reduced liver fat by 30% and visceral fat by 25%, compared to low-fat diets. The study suggests that reducing hepatic fat is a more effective predictor of long-term health risks than visceral fat.
Researchers at UCLA Health Sciences have developed a more effective method for detecting prostate cancer by combining biopsy strategies. The new approach, which includes MRI-guided biopsy, increased the rate of cancer detection to up to 33% compared to traditional methods.
The new magnetic metamaterial, made of plastic and copper, can amplify MRI imaging capabilities and cut scan time in half. It has the potential to increase the number of patients seen by clinics and decrease associated costs without risking higher-strength magnetic fields.
A large study published in Radiology found that breast MRI screening for breast cancer survivors leads to higher cancer detection rates, but also results in more unnecessary biopsies. The study analyzed data from over 13,000 women and found no significant differences in sensitivity between breast MRI and mammography.
Researchers developed a cardiac MRI method to predict mortality risk in PAH patients. By monitoring right ventricular function, doctors can provide targeted therapies and measure their effectiveness.
A study led by Roland Benoit and Philipp Paulus found that imagining interacting with a liked person at a neutral place can transfer emotional value to the location. The ventromedial prefrontal cortex plays a key role in this process, evaluating importance of individuals and places.
Scientists have discovered that patients with a rare form of dementia called Primary Progressive Aphasia show abnormalities in brain function despite structurally normal MRI scans. Functional defects were found in regions not yet showing structural damage on MRI, suggesting an early-detection method for neurodegeneration.
New trials suggest whole body MRI can diagnose cancer stage more quickly and accurately than standard imaging for colorectal and non-small cell lung cancers. This reduces treatment decision time from an average of 13 days to 8 days, while costs are lowered by nearly a quarter in some cases.
A new magnetic resonance imaging (MRI) protocol has been developed to identify premature babies with chronic lung disease, allowing for earlier diagnosis and personalized treatment. The study, published in Thorax, reveals increased T2 and decreased T1 relaxation times in MRI data, indicating the presence of Bronchopulmonary Dysplasia.
A study published at the ARRS 2019 Annual Meeting found that stereotactic body radiation therapy (SBRT) is an effective locoregional treatment option for hepatocellular carcinoma (HCC), with a low local progression rate. The results also corrected standard response assessment interpretations, suggesting that persistent arterial phase e...
A study presents the results of clinical and nonclinical Metal Artifact Reduction Sequence (MARS) MRI protocols at 3 Tesla on different hip arthroplasty implants. The findings show that only a minimal risk of thermal injury occurs with these protocols, especially when considering perfusion effects.
A study found that BI-RADS 3 lesions in baseline vs non-baseline high-risk screening MRI exams have different cancer yields, with lower rates in baseline exams. Most cancers diagnosed on follow-up are early stage and detected at or before the 6-month mark.
A retrospective database review of 28 MRI examinations with new suspicious findings found that nearly all were benign, with only a small percentage being proven malignant.
A new imaging technique using subharmonic contrast-enhanced ultrasound may help detect prostate cancer in patients where MRI is negative. The study, to be presented at the ARRS Annual Meeting, found that the technique detected PCa in 9 of 31 patients with a prior negative MRI or biopsy.
Zero TE (ZTE) skull MRI demonstrates comparable diagnostic image quality to computerized tomography (CT) for evaluating skull lesions in head trauma patients. Skull structures matched well with images obtained using CT scan, suggesting ZTE as a clinical alternative for certain cases.
A study found high negative predictive values for mammography architectural distortion without ultrasound or MRI correlate, suggesting safe follow-up rather than biopsy. The results indicate that this approach can reduce the need for intervention and lower healthcare costs.
Research presented at EuroCMR 2019 found that training for and completing a first-time marathon reduces arterial age by four years and systolic blood pressure by 4 mmHg, comparable to medication effects. The study included 139 healthy first-time marathon runners who experienced significant improvements in cardiovascular health.
Researchers found associations between body fat percentage and brain volume, with smaller gray matter volumes observed in men and women. The study suggests that obesity may contribute to negative health consequences such as dementia and cognitive decline.
A new AI system called FocalNet has been developed to aid radiologists in detecting prostate cancer, achieving 80.5% accuracy in reading MRI scans. The system uses machine learning to evaluate tumors and predict their aggressiveness, providing diagnostic guidance to less-experienced radiologists.
A study using 7-Tesla MRI detected cortical lesions in 80% of MS patients, which were strongly correlated with neurological disability and disease progression. Cortical lesions accumulated in grooves on the brain's surface called sulci, suggesting a new approach to evaluating MS progression.
A team of researchers developed an AI method for automated image analysis of brain tumors, which outperforms traditional radiological methods. The new approach enables more reliable and precise assessment of therapy response, improving overall survival predictions.
Researchers developed a wireless, battery-free sheath that can be laid on the skin and gently peeled off when needed. The patch gathers medical data and processes it locally to reduce information sent wirelessly. Since deployment at two hospitals, 90 babies have used the patches, validating them as a feasible alternative to current tec...
A study found that lumbar spine MRI reports were written at a readability level significantly above the average reading ability of US adults, with only one report meeting basic education standards. The high complexity of these reports may limit patient understanding and access to their health information.
A study found that contrast-enhanced MRI significantly benefited patient care by successfully triaging patients with discordant benign biopsy results to surgical or nonsurgical management. The test showed high sensitivity and specificity in detecting malignancies, with a false-positive rate of 6.7%.
NYU researchers have engineered nanoscale protein micelles capable of delivering chemotherapeutic drugs and being tracked by MRI, combining diagnostic capability and drug delivery. This innovation reduces the need for surgical intervention and allows for non-invasive monitoring of therapeutic progress.
Researchers developed a non-invasive MRI methodology to determine if tumours have invaded lymph nodes prior to surgery. This innovation helps clinicians choose optimal treatment strategies and reduces overtreatment risks. By improving accuracy, SPI may also aid in selecting patients for pre-operative radiation and chemotherapy.
A new MRI method measures iron content to monitor recovery from stroke-related damage and track neurodegeneration in the substantia nigra. Higher iron levels are associated with worse long-term outcomes and potential therapies may slow or stop degeneration.
A new study found that non-contrast MRI is just as effective as contrast-enhanced MRI for monitoring disease progression in MS patients. The study used image subtraction techniques to detect newly occurring lesions with high sensitivity.
Researchers found an early atrophy of amygdala and hippocampus in Alzheimer's patients at age 40, differing from normal aging process. Studying biomarkers revealed certain structures shrink before dementia appears.
Researchers at Delft University of Technology have created a quantum circuit that enables the detection of weak radio signals, which could revolutionize fields like radio astronomy and medicine. The breakthrough opens up possibilities for experiments that explore the interplay between quantum mechanics and gravity.
Boston University researchers created an open, ringlike structure that perfectly cancels out sounds while maintaining airflow, silencing nearly all noise from a loudspeaker. The acoustic metamaterial can be customized to fit various environments, including drones, fans, and MRI machines.
A study found that brain regions involved in emotional processing and controlling the body's unconscious workings do not communicate as well in patients with Takotsubo syndrome, a condition known as 'broken heart' syndrome. This decrease in communication may contribute to the development of TTS, which is triggered by emotional stressors.
A study using high-resolution MRI scans found that protein content in glioma tumors is associated with treatment response and patient survival. The research suggests that assessing tumor protein levels could help choose the best possible treatment strategy for patients.
Researchers at MIT have developed a way to measure oxygen levels of pancreatic islet cells over long periods, enabling them to predict which implants will be most effective in treating diabetes. This breakthrough could lead to better designs for artificial pancreas systems.
A recent study published in the Journal of Biomechanics used advanced MRI techniques to track wrist bone movement in 18 individuals, revealing gender-based differences. The researchers found that while individual left and right wrists are similar, there are distinct differences between male and female wrists.
A study from Duke Health researchers reveals that MRI cardiac stress testing can predict mortality and diagnose coronary artery disease more effectively than existing methods. The non-invasive technology has potential as an alternative to stress echocardiograms, catheterizations, and nuclear exams.
A novel experiment at PPPL has demonstrated the validity of magnetorotational instability (MRI) theory, which explains how stars and planets form from accretion disks. The study found that weakly tethered rotating balls gained angular momentum and shifted outward, consistent with MRI predictions.
Researchers found that combining iodine-123 metaiodobenzylguanidine (123I-MIBG) SPECT imaging with cardiac magnetic resonance imaging (MRI) helps identify specific subsets of heart tissue more prone to arrhythmias. This approach enables physicians to achieve improved VT suppression and shorter procedure times.
A systematic prospective study investigated the safety of MRI scans for individuals with tattoos. Researchers found that the risk of side effects is very small and that most participants did not experience any adverse reactions. The study's results provide valuable information on safety guidelines for research and clinical environments.
Researchers have developed an innovative 'elastic' contrast media that enhances MRI diagnostics without increasing contrast medium use. The new method utilizes a self-regulating protein structure that absorbs xenon to improve image quality, allowing for better detection of disease markers in low concentrations.
Holistic thinkers exhibited similar brain activity when watching a dramatic film, whereas analytical thinkers showed distinct responses. The study suggests that holistic thinkers perceive the world in a more integrated way, processing moral issues and factual connections similarly with each other.