Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is the gold standard imaging modality for soft tissues. It produces detail cross-sectional images of soft tissue and bone anatomy, including muscles, tendons, ligaments, brain and organs, without the use of ionizing radiation. In addition to orthopedic imaging, MRI is also used for heart, brain and breast. MRI uses gadolinium contrast in many exams to highlight tissues and blood vessels, which enhances images and offers better diagnostic quality. It can also be used in conjunction with PET scans. How does MRI work? MR creates images by using powerful magnets to polarize hydrogen atoms in water (the body is made of of more than 80% water) so they face in one direction. A radiofrequency pulse is then used to ping these atoms, causing them to wobble, or resonate. The MRI coils detect this and computers can assemble images from the signals. Basic MRI scans will focus on the resonance of fat and water in two different sequences, which highlight and contrast different features in the anatomy.

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New MRI findings suggest that even moderate drinkers are at risk of alcohol-related cognitive decline

In the largest known study to date on the relationship between moderate alcohol consumption and iron homeostasis, experts suggested that as little as four drinks per week can increase the presence of iron deposits on imaging.

July 19, 2022
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New MRI method can identify early signs of Parkinson's

The researchers are now working on developing a qMRI method that can be incorporated into clinical settings, with an anticipated timeline of three to five years. 

July 15, 2022
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Imaging surveillance program detects pancreatic cancer in its earliest stages

Individuals at high risk of pancreatic cancer benefit from annual imaging and have decreased mortality rates compared to those who forgo preventive screening.  

July 14, 2022
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Philips seeks to reduce MRI scan times with new FDA cleared AI-powered software

The new AI addition is said to increase resolution by up to 65% and is compatible with 97% of current MRI protocols.

July 13, 2022
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AI boosts accuracy when discriminating between malignant and benign ovarian tumors on MRI

Out of three trained and tested models that incorporated varying features, the model that combined clinical and radiomics features to predict malignancy exceeded the others in accuracy, precision and sensitivity.

July 11, 2022
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Experts use MRI to pinpoint link between pediatric TBI and cognitive impairment

At least one white matter tract with reduced volume—most often in midline white matter structures including the corpus callosum—was observed in 28% of TBI patients.

July 8, 2022
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Some neurovascular imaging studies are overutilized in stroke triage

Triaging patients with stroke-like symptoms using MRI with diffusion-weighted imaging (DWI) could reduce the cost burden associated with unnecessary neurovascular imaging procedures. 

July 1, 2022
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Detailed MRI reveals pulmonary vascular abnormalities in COVID long-haulers

Researchers had 40 participants inhale polarized xenon gas in order to conduct 129Xe MRI exams for the study.

July 1, 2022

Around the web

Automated AI-generated measurements combined with annotated CT images can improve treatment planning and help referring physicians and patients better understand their disease, explained Sarah Jane Rinehart, MD, director of cardiac imaging with Charleston Area Medical Center.

Two advanced algorithms—one for CAC scores and another for segmenting cardiac chamber volumes—outperformed radiologists when assessing low-dose chest CT scans. 

"Gen AI can help tackle repetitive tasks and provide insights into massive datasets, saving valuable time," Thomas Kurian, CEO of Google Cloud, said Tuesday. 

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