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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Researchers use fMRI to study the brains of crocodiles

It’s no secret that researchers often use MRI equipment in creative ways. That trend has been continued by a group that turned to functional MRI (fMRI) to view the brains of crocodiles as they were exposed to various sounds.

May 7, 2018

New York hospital drops $4.4M on claustrophobia-fighting MRI suite

Kenmore Mercy Hospital in Buffalo, New York, is taking its advanced imaging services up a notch with a $4.4 million MRI suite, Niagara Frontier Publications reported this week.

May 3, 2018

MRA vs CTA for evaluating pulmonary embolism: Does the chosen modality impact downstream imaging utilization?

MR angiography (MRA) is a relatively new alternative to CT angiography (CTA) for the evaluation of suspected pulmonary embolism (PE) and it even has one major advantage over CTA: it does not expose patients to ionizing radiation.

May 3, 2018
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Exporting data from DXA exams directly to the EMR reduces errors, improves turnaround times

Automatically exporting bone mineral density (BMD) data from dual-energy x-ray absorptiometry (DXA) exams to the electronic medical record (EMR) reduces errors and improves turnaround times, according to a new study published in the Journal of Digital Imaging.

May 3, 2018

Whole-body MR angiography can identify early atherosclerosis at a population level

Whole-body MR angiography (MRA) is an effective screening tool for identifying early atherosclerosis in patients at low to intermediate risk for cardiovascular disease, according to a new study published by Radiology.

May 2, 2018

Novel MRI sensor allows for more sensitive imaging by tracking calcium

A novel calcium-based MRI sensor will allow for more sensitive brain imaging by tracking calcium ions to monitor deep neural activity, according to research out of the Massachusetts Institute of Technology.

April 30, 2018

Multiparametric MRI with PI-RADSv2 misses ‘considerable number’ of prostate cancer lesions, could still provide value

The combination of multiparametric MRI and the recently revised Prostate Imaging Reporting and Data System version 2 (PI-RADSv2) misses a “considerable number” of clinically significant prostate cancer (PCA) lesions, according to a new study published in the American Journal of Roentgenology. The authors noted, however, that the high positive predictive value (PPV) might make this method useful for imaging active surveillance (AS) patients.

April 30, 2018

Can convolutional neural networks accurately select MRI protocols?

Deep learning-based convolutional neural networks (CNNs) can help radiologists select musculoskeletal MRI protocols, according to a study published by the Journal of Digital Imaging.

April 27, 2018