Articles tagged with Magnetic Resonance Imaging
Researchers at Caltech have developed a method to link magnetic resonance imaging signals to gene expression in cells, allowing for non-invasive monitoring of disease. The technique uses aquaporin reporter genes to visualize gene expression in living tissues, with potential clinical translation.
Researchers at UC San Diego developed a non-invasive method to detect infections in prostheses using an improved version of electrical capacitance tomography and a thin-film sensor that can detect changes in pH levels. The new method could provide quantitative diagnostic information about the extent and locations of infections.
A study published in The Lancet found that adding an MRI scan after a 20-week ultrasound scan can increase the accuracy of diagnosing fetal brain abnormalities, with almost all scans being correct. This extra information helps doctors give more accurate diagnoses and advice to parents.
Research reveals that endurance running alters brain structure and function in ways similar to complex tasks like playing a musical instrument. The study found greater functional connectivity in the brains of young adult cross country runners compared to sedentary individuals.
MR urography (MRU) offers an alternative to CT urography (CTU) for whole urinary tract imaging. However, proper technique is crucial, with steps needed to ensure adequate distention and visualization of the entire system.
Researchers have shown that macrocyclic MRI contrast agents may reduce the risk of gadolinium brain deposition, a concern for patients with multiple sclerosis. Macrocyclic agents were found to minimize deposits in the cerebellum, whereas linear agents posed a higher risk.
Researchers found that high-resolution brain scans using magnetoencephalography (MEG) can detect concussions more accurately than traditional methods like MRI or CT scans. MEG measures changes in brain communication between areas, allowing for earlier diagnosis and potentially improved treatment and recovery processes.
A panel of urologists and radiologists recommends using prostate MRI and MRI targeted biopsy for patients with suspected prostate cancer despite a prior negative biopsy. The recommended guidelines aim to improve detection rates, accuracy, and treatment options for these patients.
Researchers used MRI measurements to detect higher levels of oxidative stress in patients with schizophrenia compared to healthy individuals and those with bipolar disorder. The study suggests that oxidation imbalance may contribute to the development and progression of schizophrenia.
Researchers developed a high-precision sensor to measure small variations in strong magnetic fields, enabling the detection of mechanical processes in the body. The technique has broad applications in medicine and biological research, including the development of new contrast agents for MRI.
Researchers create new sensors that detect proteins and induce blood flow changes, allowing for non-radiative imaging of molecules in the brain. This approach enables detection of biologically low-level molecules and monitoring of dynamic processes in the brain.
A world-first MRI study has investigated the heart function of kidney patients undergoing dialysis treatment, revealing significant cardiovascular effects with both standard haemodialysis and hemodiafiltration. Both treatments caused falls in cardiac performance, with partial recovery after dialysis, highlighting the need for intervent...
Adults with MCI who exercised four times a week experienced an increase in brain volume, particularly in gray matter regions. Aerobic exercise also improved executive function compared to stretching exercises.
Researchers used whole-brain MRI mapping to reveal pathological alterations in brain iron distribution. They found excess iron in areas like the substantia nigra and decreased iron content in previously overlooked regions, such as the dentate nucleus.
Three new studies provide insight into the effects of Zika virus on congenital brain damage in babies and adults with neurological disorders. The research highlights common CT brain findings, including decreased brain volume and calcifications, as well as MRI findings such as orbital injuries and anatomical changes in brain tissue.
A new imaging technique has confirmed that each person's brain structure is unique, allowing for nearly perfect identification. The study also shows the brain's unique pattern changes over time.
A noninvasive Magnetic Resonance Imaging (MRI) method has been proposed to detect bone marrow cancer, potentially changing the way this disease is diagnosed. The researchers used T2-weighted MRI to identify a pre-fibrotic state of the disease with a clear bright signal.
A new study has identified a group of brain structural networks linked to loss of cognitive function, highlighting the importance of cerebral small vessel disease. The research found that certain networks are less affected by age, while others show decreased expression and correlation with impaired cognitive functioning.
The SENTINEL trial found that the Sentinel device was safe during TAVR but did not meet its primary efficacy endpoint of reducing median new lesion volume on MRI. Despite this, embolic protection resulted in a reduction of new lesion volume after adjusting for confounders.
A study using MRI found significant structural differences in the brains of children with PTSD compared to those without. The findings suggest a shift towards a more localized network structure, which may be a target for future treatments. This research could help develop new interventions for pediatric PTSD.
A comprehensive rat brain atlas has been created to guide stereotaxic surgery procedures, combining high-resolution MRI images with histological sections. The atlas features a standardized reference grid and precise coordinates, enabling accurate targeting of surgical targets.
Researchers at UVA have created a new imaging method that combines the advantages of MRI and gamma-ray imaging, enabling high-resolution medical diagnostics with minimal tracer material. The technique uses radioactive xenon isotopes to produce images with increased sensitivity and diagnostic power.
The University of Melbourne team created a quantum molecular microscope to image individual atoms in bio-molecules, overcoming issues with conventional biomolecule imaging. The system uses atomic-sized qubits as highly sensitive quantum sensors to capture high-resolution images.
A new imaging technique can predict who is most at risk for stroke due to atrial fibrillation. The technique, called 'atrial 4D flow CMR,' detects blood flow velocity and can help reduce over-treatment of patients.
GuidaBot is developing a robotic system that enables doctors to perform biopsies while the patient remains within an MRI machine, allowing for faster and more precise procedures. The company has received a $225,000 grant from the National Science Foundation to support ongoing research and testing of prototype systems.
Chemists have created a new technique to yield highly detailed, three-dimensional images of battery interiors. This approach uses magnetic resonance imaging (MRI) to monitor the condition of batteries in real time, potentially leading to more efficient and safer power sources.
A study by the American Academy of Orthopaedic Surgeons found that X-rays are the most effective diagnostic tool for knee pain in middle-aged patients. The study suggests that weight-bearing X-rays should be obtained before an MRI to screen for knee pain, as they can often provide enough information for a diagnosis and treatment plan.
A new scanning technique produces extremely high-res 3D images of bones without exposing patients to X-ray radiation. The technique uses biologically safe nanoagents that target calcium-rich surfaces in damaged bones, providing detailed blueprints of weakness or injury.
Researchers used the DecNef technique to associate neutral faces with positive or negative feelings in volunteers, resulting in changes in facial preferences. The study suggests that the cingulate cortex is involved in handling both sides of emotion, leading to significant changes in ratings for faces rated as positive or negative.
A new study published in JAMA found that performing an MRI on a woman in the early part of pregnancy does not increase the risk of stillbirth, death after birth, or birth defects. The study also found no association between first-trimester MRIs and vision loss, hearing loss, or cancer in children's first four years.
A new study found a correlation between microscopic brain damage and impaired cognitive performance in patients with symptomatic carotid artery disease. The researchers used diffusion tensor imaging to assess white matter tract skeleton mean diffusivity, which showed the closest correlation with cognitive impairment.
Exposure to MRI during the first trimester was not associated with increased risk of harm to the fetus or congenital anomalies. However, gadolinium-enhanced MRI was linked to a broad set of rheumatological and inflammatory conditions in early childhood.
A study by researchers at four US medical centers found that common conditions are frequently misdiagnosed as multiple sclerosis, leading patients to receive unnecessary treatment. The study identified five primary diagnoses that mimic MS symptoms, resulting in long-term misdiagnosis for some patients.
Researchers at UCLA have discovered that MRI scans can detect the shrinkage of key brain regions in individuals with cognitive problems, similar to those seen in CTE cases confirmed by autopsy. This finding raises the possibility of using MRI scans to diagnose CTE in living patients.
Researchers at UT Southwestern Medical Center developed a novel MRI method that can detect low levels of zinc ions to differentiate between healthy and malignant prostate tissue. This technique has the potential to serve as a biomarker for tracking prostate cancer progression.
Researchers at the University of California San Diego have developed a non-invasive MRI technique that measures liver fat density with high accuracy. This method corresponds to histological responses in patients with nonalcoholic steatohepatitis and shows promise for future clinical trials and treatment.
A new MRI technique, Plug-and-Play MR Fingerprinting (PnP-MRF), has been developed to eliminate artifacts and create high-quality images. This innovation enables accurate diagnoses and reveals disease patterns that are consistent from patient to patient, promising superior imaging with less expensive machines.
A new cerebral protection device has been shown to reduce the number and volume of brain lesions in high-risk patients undergoing transcatheter aortic valve implantation. The study found significant reductions in brain damage and adverse events, but calls for further research to assess long-term effects.
Scientists at the University of Basel have created nanoparticles that can serve as efficient contrast agents for magnetic resonance imaging (MRI). These smart nanoparticles produce significantly more contrast than traditional contrast agents and respond to specific environments.
A new detailed map of the brain's cerebral cortex will aid researchers studying brain disorders and elucidate human uniqueness. The map divides both hemispheres into 180 areas based on physical and functional differences.
A high-temperature superconducting coil developed by UH scientists boosts signal-to-noise ratio, revealing brain structures not easily visualized with conventional coils. The new technology can also acquire images in a shorter time than conventional coils.
Neuroscientists found specific brain regions active when using prototype and exemplar strategies for categorization. These strategies help reduce information load by applying different cognitive processes.
Researchers mapped brain connections after stroke to predict language deficits, finding damage beyond cortical tissue is crucial for language impairment. The study suggests connections in the parietal region play a key role in language function, with preservation of these connections linked to better recovery chances.
Researchers have discovered that swordfish use a large oil gland at the base of their bill to reduce drag and achieve super-fast speeds. This gland produces a surface that is super water-repellent, reducing drag by over 20%.
Researchers have developed an AI-powered MRI technique that can detect early forms of dementia, including mild cognitive impairment and Alzheimer's disease. The technique uses machine learning to analyze perfusion maps created by arterial spin labeling (ASL) imaging, with high accuracy in distinguishing between patients.
A large-scale study of 246,557 patients found no significant association between gadolinium exposure and parkinsonism, a degenerative disorder of the central nervous system. Researchers observed a similar incidence of incident parkinsonism among those exposed to gadolinium-enhanced MRIs as those who received non-gadolinium-enhanced MRIs.
Researchers at Rutgers University have developed a soft motor that enables torque without bending, making it suitable for search and rescue missions, deep space exploration, and manipulating objects during MRI. The squishy wheels allow for passive suspensions in wheeled vehicles, making the design simple yet effective.
Researchers have discovered a massive helium gas field in the Tanzanian Rift Valley, ensuring a stable supply of this finite resource. The find, associated with volcanoes, has calculated a probable resource of 54 Billion Cubic Feet, enough to fill over 1.2 million medical MRI scanners.
A new study published in Radiology found that pre-operative supine MRI can provide more detailed and accurate information than prone MRI, helping surgeons detect remnant tumors and ensure clear margins. This could lead to effective tumor removal and reduce the need for re-operations.
Researchers used advanced MRI to predict which concussion patients would fully recover and identify brain areas involved in the repair process. The study found that high FA white-matter areas correlated with better outcomes, while low FA areas showed axon damage and cognitive impairment.
A University of California San Diego study describes a new imaging biomarker that enhances MRI to differentiate aggressive prostate cancer from low-grade or benign tumors. The technology, called restriction spectrum imaging (RSI), allows for non-invasive detection and prediction of tumor grade without biopsy.
A new study published in Radiology found increased blood-brain barrier permeability in people with early Alzheimer's disease. The researchers used contrast-enhanced MRI to identify leakages in the BBB, which could represent a key mechanism in the early stages of the disease.
Researchers developed a new contrast agent to monitor stem cell treatments inside the body using MRI scans. The agent addresses technical challenges such as toxicity and accumulation in cells, offering improved resolution and sensitivity.
The study, published in the American Society of Neuroradiology's annual meeting, found that younger patients, African-Americans, and those seen by a stroke team received more advanced imaging, including MRI and MR angiogram. The findings highlight disparities in neuroimaging use for different patient groups.
Long-term AA members who recited AA prayers after viewing drinking-related images reported less craving for alcohol than those who just read a newspaper. Brain activity increased in areas responsible for attention and emotion, suggesting an innate ability to minimize the effect of alcohol triggers.
Researchers developed a new approach to prostate cancer treatment using vessel-sparing radiation combined with MRI. The technique reduces side effects such as erectile dysfunction and bladder or rectal irritation while achieving high cure rates.
A new virtual heart assessment tool developed by Johns Hopkins University predicts which patients are most likely to experience life-threatening arrhythmias. The tool, VARP, uses magnetic resonance imaging records and computer modeling techniques to gauge the risk of sudden cardiac death.
Cardiovascular magnetic resonance (CMR) is a stronger predictor of risk for major adverse cardiovascular events (MACE) than single-photon emission computed tomography (SPECT). CMR has higher sensitivity and negative predictive value compared to SPECT, making it a robust alternative for diagnosing coronary heart disease.
A recent study published in NeuroImage tracked the rate of myelination in children's brains, revealing insights into the rapid growth of nerve fibers during childhood. The findings have implications for understanding neurodevelopmental disorders and diseases like multiple sclerosis and leukodystrophies.
Researchers have developed detailed digital models of organs that can accurately monitor and outcome measurements for clinical trials. These models can enable more effective monitoring of the impact of new drugs and treatments, reducing the need for invasive tests.