Articles tagged with Magnetic Resonance Imaging
A study found that imaging-guided percutaneous needle biopsies increased by 67% between 1997 and 2008, while open biopsies decreased. The technique offers greater precision and lower complication rates, resulting in a modest growth rate of 3% overall.
A University of Kentucky study found changes in white matter connections in high-risk Alzheimer's patients before symptoms manifest. The research used MRI to assess microstructural integrity of axons and myelin in the brains of high- and low-risk groups.
Researchers used CASL MRI to compare cerebral blood flow in 11 non-medicated patients with schizophrenia and 25 healthy controls. The study revealed extensive areas of hypoperfusion in frontal lobes and higher cognitive function regions, while hyperperfusion was observed in cerebellum and brainstem.
Researchers at Massachusetts General Hospital describe mathematical patterns underlying human preference, potentially guiding psychiatric disorder diagnosis and treatment. The study's findings meet criteria for scientific laws, showing predictable patterns in preference behavior.
Researchers used MRI to identify high-risk atherosclerotic plaques in an animal model, which could lead to non-invasive diagnosis and treatment of patients. The study found that MRI can accurately detect stable and unstable plaques, including those with enhanced gadolinium uptake associated with inflammation.
A new rule at Massachusetts General Hospital has led to a significant decrease in unnecessary imaging exams for patients. The change encourages physicians to directly log into the system, reducing low-yield exams from 5.4% to 1.9%.
A case report highlights the diagnostic significance of computed tomography (CT) and magnetic resonance imaging (MRI) for duodenocaval fistula (DCF). Noninvasive CT and MRI are suggested as a first-line investigation for diagnosis, improving patient outcomes.
The NIST-developed Phannie phantom is a plastic sphere filled with water-bathed grids of small magnetized spheres. It allows for accurate calibration of MRI machines, improving image quality and reliability. The phantom will help reduce medical costs by enabling consistent tumor measurements across patients and scanners.
Conventional MRI may detect a large percentage of hip labral tears, suggesting it as an acceptable alternative to MR arthrography. However, further study is needed to confirm its effectiveness in evaluating nonspecific hip pain.
Researchers will assess MRI technology to measure muscle tissue in children with Duchenne muscular dystrophy, aiming to facilitate therapy testing and improve disease management. The study may provide valuable guidelines for MRI use in clinical trials and drug tests targeting DMD treatments.
A recent study presented at the ARRS Annual Meeting found that whole body MRI is highly accurate in detecting breast cancer metastases. The test identified bone metastases in 47 out of 99 patients with known breast cancer, while a chest X-ray only detected them in 24 patients.
Ultrasound imaging is a highly effective and non-invasive test for characterizing peroneal nerve damage in patients with foot drop. High-resolution ultrasound was found to be more effective than EMG and MRI for evaluating common causes of foot drop, making it the recommended first-line imaging choice.
A study found that preoperative MRI can help surgeons identify the neurovascular bundle and spare it during RALP, leading to better erectile function outcomes. The technique has improved surgical decision-making without compromising oncological results.
Tetrahedral dice pack 76% of container space, surpassing sphere packing, and single molecules can calculate thousands of times faster than PCs.
A study suggests that preoperative breast MRI can reduce local breast cancer recurrences at follow-up, particularly in young patients with dense breast tissue. The study found that patients who received a contrast-enhanced MRI prior to surgery had significantly fewer local recurrence cases.
A new study suggests that indeterminate breast lesions found in high-risk patients should be evaluated more aggressively to exclude a possible malignancy. The research found that 22% of these lesions were proven positive for cancer on follow-up and subsequent biopsy, highlighting the need for earlier evaluation.
A study suggests that breast magnetic resonance imaging (MRI) can detect breast lesions missed on mammography and ultrasound, influencing surgical management choices. Breast MRI positively impacts patient management decisions, potentially reducing the need for re-intervention by accurately assessing tumor extent.
Researchers at Ohio State University have developed nanoparticles that can enhance MRI scans and surgical procedures for brain tumor removal. The magnetic and fluorescent nanocomposites can help doctors visualize tumors before surgery, allowing for more precise removal.
Advanced imaging techniques like CT scans and MRI can shorten hospital stays and decrease costs. Studies found that early imaging on the day before or day of admission resulted in a one-day shorter length of stay for certain patients.
A new study by the American College of Radiology found that X-rays are often inconclusive in detecting hip and pelvic fractures. The study used magnetic resonance imaging (MRI) to confirm or rule out fractures, revealing a significant number of missed diagnoses.
A study published in the American Journal of Roentgenology found significant geographic variation in noninvasive diagnostic imaging utilization rates among Medicare beneficiaries. The study revealed that Atlanta had the highest utilization rate, while Seattle had the lowest, with a difference of over 50% between the two regions.
Researchers at Johns Hopkins School of Medicine have discovered a potential new treatment using bone marrow stem cells to build new blood vessels in the upper leg. The treatment, which uses X-ray-visible microbubbles to deliver stem cells, was shown to dramatically improve the body's ability to form new blood vessels and provide a more...
Magnetic resonance-guided focused ultrasound (MRgFUS) is a new interventional radiology tool showing promise in treating uterine fibroids, offering lasting relief from symptoms without surgery. In a study of over 100 patients, women experienced significant improvement in symptoms, with 90% reporting considerable or excellent relief.
A recent study reveals that 70% of professional and collegiate hockey players had abnormal hip and pelvis MRIs despite no symptoms. The findings highlight the importance of using clinical judgment alongside imaging in sports medicine diagnosis.
Postmenopausal women, especially those over 70, have a higher prevalence of cancer detected in the undiagnosed breast with MRI compared to premenopausal women. Detecting and treating both breasts at the same time may save costs and reduce patient stress.
A study published in the Journal of the American College of Radiology found that PET scanner ownership by non-radiologists has significantly increased, outpacing radiologist-owned scans. This trend contributes to unnecessary imaging utilization and increased costs.
A large academic medical center found that a significant percentage of outpatient referrals for CT and MRI studies from primary care physicians were inappropriate. The study, performed at Harborview Medical Center in Seattle, WA, included medical records from 459 elective outpatient CT and MR examinations.
A recent multicenter cohort study reveals that magnetic resonance imaging (MRI) is substantially more accurate for early diagnosis of breast cancer than digital mammography or breast ultrasound. For young women at elevated risk, annual MRI is considered necessary and sufficient for screening.
Research using MRI reveals that childhood stress and abuse can lead to permanent brain structure changes, making individuals more susceptible to developing depression. The study's findings have significant implications for early intervention and prevention strategies.
A new study suggests that annual combined screening with both mammography and breast MRI can improve life expectancy in women with increased breast cancer risk. This approach detects early-stage cancers more effectively and provides the greatest relative mortality reduction.
A study published in the American Journal of Roentgenology found that MRI accurately identified 28 malignant and 7 benign lesions, enabling accurate estimation of local disease extent in patients with malignant tumors. This noninvasive diagnostic tool may improve patient care by reducing unnecessary surgical procedures.
Researchers used contrast-enhanced MRI to differentiate between rheumatoid arthritis and psoriatic arthritis, finding a significant difference in perfusion after 15 minutes. The study suggests that contrast-enhanced MRI could play a key role in targeted therapies for each condition.
The COMICE study found that adding MRI to conventional triple assessment for breast cancer diagnosis had no impact on reoperation rates. Despite this, the study suggests that routine use of MRI in this population may not reduce health outcomes or costs, but rather increase them. The results have implications for healthcare providers an...
A new study by neurology researchers at the University at Buffalo found that blacks with multiple sclerosis (MS) have more damage to brain tissue and accumulate lesions faster than whites. This aggressive disease process in blacks is associated with reduced remyelination, a brain's ability to repair the protective myelin sheath.
A new study found that adding a contrast agent to MRI improves the accuracy of detecting lymph node metastases. The researchers concluded that incorporating contrast enhancement in malignancy criteria improves diagnostic test accuracy, and histopathologic examination should still be used as a gold standard.
Researchers found that CT scans are more accurate than MRI in ruling out coronary artery disease. Extended-duration transdermal nicotine therapy was also shown to increase smokers' chances of quitting successfully.
A recent study published in the American Journal of Roentgenology found that acute adverse reactions from gadolinium-based contrast agents used during MRI are rare, occurring in only 0.16 percent of all administrations. The majority of reactions were mild, while six moderate and two severe reactions were reported.
Researchers used MEG to distinguish between neural activity of PTSD patients and healthy controls with over 90% accuracy. A positive association was found between prediction certainty and symptom severity, suggesting potential use in gauging disorder levels.
In a study published in World Journal of Gastroenterology, researchers found that MRI-enterography revealed incidental findings outside the small intestine in 25% of patients with suspected or known Crohn's disease. These extra-intestinal manifestations were rare and did not necessarily require additional examinations.
Researchers at Northwestern University have developed a gadolinium-nanodiamond complex that dramatically enhances image contrast in magnetic resonance imaging (MRI). The complex shows a significant increase in relaxivity, resulting in vivid image contrast.
The new SBI and ACR recommendations suggest that breast cancer screening should begin at age 40, with annual screening recommended for average-risk patients. High-risk patients may start screening as early as age 30. The guidelines aim to reduce mortality rates from breast cancer through earlier detection.
A study found that only 51.6% of eligible women completed a screening MRI, with claustrophobia as the primary reason for nonparticipation. Alternative methods like ultrasound may be considered for high-risk women who cannot undergo MRI screening.
A Rice University team developed a single nanoparticle that can be tracked in real-time with MRI as it targets cancer cells, tags them with fluorescent dye and kills them with heat. This all-in-one particle is a promising example of theranostics, a growing field developing technologies for diagnosis and treatment in one procedure.
Certain cardiac pacemakers may inadequately stimulate a patient's heart while undergoing an MRI scan due to the magnetic pulses mixing with electronic pulses from the pacemaker. This can lead to incorrect or absent stimulation and is potentially dangerous for the patient undergoing the scan.
Researchers found that MRI coupled with mammography detected almost all cancers at an early stage in high-risk women, resulting in smaller cancer sizes and fewer advanced cases. This alternative screening method may convince healthcare providers to recommend yearly MRI and mammography over surgical removal of the breast.
Researchers have developed a new method using diffusion tensor imaging (DTI) to improve the removal of benign tumors in children. By visualizing nerve fiber bundles, DTI enables surgeons to avoid damaging critical brain tissue and achieve more complete tumor removal.
A clinical trial found annual ultrasound screening significantly improves early breast cancer detection in women with dense breasts, while MRI increases sensitivity but also false-positive findings. The study suggests annual ultrasound as a suitable alternative to expensive MRI for these women.
A recent study found that MRI is highly accurate in detecting placenta accreta, a condition where the placenta attaches too deeply to the uterus. The condition can lead to severe bleeding and maternal death if not diagnosed early. With an accuracy rate of 90.1%, MRI has become a valuable tool in prenatal care.
A recent study found that 95% of radiation oncologists utilize advanced imaging modalities like FDG-PET and MRI for target delineation. The most common technologies used were FDG-PET and MRI, with nearly 75% of respondents using one or both.
A simple blood test can help optimize the timing of breast MRI exams in premenopausal women with irregular cycles, reducing non-diagnostic tests and repeat scans. Researchers found that a blood test to determine serum progesterone concentration can aid in optimal timing.
Scientists are using various imaging techniques, including MRI and CT scans, to study chronic obstructive pulmonary disease (COPD) and develop a better understanding of the disease. The research aims to categorize COPD patients into two major groups based on airway dysfunction and lung tissue damage.
A new medical imaging technique called dynamic MRI has been found to identify pelvic organ prolapse in women with lower urinary tract symptoms. The condition can go undiagnosed due to its lack of symptoms at rest, but becomes apparent when the patient strains.
Researchers at UC Santa Barbara have demonstrated electrically manipulating quantum states of electrons in diamond crystals, a step towards developing quantum computers. The achievement enables the creation of magnetic fields large enough to change an atomic-scale defect's quantum state in under one billionth of a second.
Researchers developed a fast and accurate method to quantify subtle brain volume loss in Alzheimer's patients, outperforming existing measures. The new technique identifies changes in memory regions, particularly the entorhinal cortex, as sensitive markers for early disease stages.
Researchers at Rice University and the Texas Heart Institute will label stem cells with gadonanotubes to track their effectiveness in regenerating damaged heart tissue. The team aims to use MRI to steer the cells in vivo with an external magnetic field.
A new study published in The Lancet Neurology found that therapeutic hypothermia reduces lesions and improves outcomes for infants starved of oxygen at birth. MRI scans predict with 80% accuracy the likelihood of death or disability by 18 months.
Researchers found that patients are dissatisfied with the current system of receiving radiology test results, citing long delays and lack of detail. The study suggests that patients would prefer to have secure online access to their medical records, including detailed results, to improve their care experience.
Meniscal tears in children can often be repaired successfully with appropriate treatment, with a high success rate of 75-90%. Early treatment is crucial to prevent complications and promote long-term health. Diagnosing meniscal tears requires simple physical exams and imaging tests, such as MRI, to accurately assess the injury.
Neurologists at the University at Buffalo are conducting a research study to test the possibility that chronic cerebrospinal venous insufficiency (CCSVI) is the underlying cause of multiple sclerosis. The study aims to evaluate the velocity of blood flow through brain vessels and extracranial veins using Doppler ultrasound.
A new study by Stanford University School of Medicine found that areas with high concentrations of magnetic resonance imaging machines are more likely to have patients undergoing back surgeries. The researchers correlated the number of MRI machines in an area with the likelihood of low-back pain patients receiving MRIs and subsequent s...