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.

RSNA Tech Spotlight

Built for value-based care: How the world’s first portable MR scanner is democratizing imaging

Sponsored by Hyperfine

Connecticut-based Hyperfine made waves earlier this year when it announced the arrival of what it calls the “world’s first” portable MRI scanner. Which brings about interesting questions: How does it work? Is it replacing traditional technology? And what has COVID-19 meant for mobile imaging?

November 23, 2020

Preventative, elective care plummet nationwide amid pandemic, including drops in mammography, MRI

The JAMA study is one of the first to quantify cuts in such care, authors claim, using data from nearly 7M commercially insured Americans in all 50 states. 

November 6, 2020

Acoustic noise reduction in MRI significantly reduces patient discomfort without hurting image quality

Loud sounds emitting from magnetic resonance machines can erode the patient experience, but Swiss experts may have found the fix. 

November 4, 2020
political brain imaging politics

Scientists look to functional MR brain imaging to understand America’s political divide

Experts from three prominent institutions hope their neuroimaging work will inform new interventions to address partisan discord. 

November 2, 2020
Brain

New 3D imaging technique doubles the visibility of brain tumors on MR scans

Inventor and lead author Robert Edelman, MD, compared the advancement to stargazing at night versus during the day. 

October 28, 2020

Fast MRI an ‘effective and feasible’ option for detecting cancer in dense breasts

In one recent study, AB-MR pinpointed 13 additional cancer cases that DBT missed, Penn Medicine announced recently. 

October 28, 2020
calculator

Radiology practices must step up their cost-accounting game as CMS places price pressure on CT, MRI

The American College of Radiology recently raised concerns about this issue in comments submitted to the feds. 

October 23, 2020
Philips MRI

SimonMed signs MRI pact with Philips; FDA clears several new AI algorithms, plus more vendor news

Also, Sectra signs seven-year contract in the Netherlands, GE Healthcare announces an industry first, and Fujifilm expands a mammography-related partnership. 

October 21, 2020

Around the web

"This was an unneeded burden, which was solely adding to the administrative hassles of medicine," said American Society of Nuclear Cardiology President Larry Phillips.

SCAI and four other major healthcare organizations signed a joint letter in support of intravascular ultrasound. 

The newly approved AI models are designed to improve the detection of pulmonary embolisms and strokes in patients who undergo CT scans.

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