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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NIST paving the way for traceable measurements in the human body via MRI

A novel system that can calibrate medical imaging biomarkers could be paving the way for MRI to make precise, traceable measurements inside the human body, the National Institute of Standards and Technology (NIST) announced late this March.

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Hospital where MRI-related death occurred installing brand new equipment

A 32-year-old man died on Jan. 27 after being sucked into an MRI chamber at BYL Nair Hospital in Mumbai, India. That hospital has now decided to replace the MRI scanner, which had not been used since the incident.

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Canadian health minister promises $11M to reduce MRI wait times

British Columbia, Canada, will be receiving an additional $11 million this year to expand MRI usage across the province, the Canadian Broadcasting Corporation reported this week.

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7-Tesla MRI could be a game-changer for diagnosing, treating brain tumors

A 7-Tesla-strong MRI machine could be changing the way brain tumors are diagnosed and treated, University of Southern California researchers reported this week.

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Machine learning model accurately predicts who would benefit most from mpMRIs

A novel machine learning model could accurately predict which men might benefit most from additional imaging before a prostate biopsy, saving patients both money and discomfort, a new study states.

High-risk breast cancer patients avoid MRIs that could improve early detection of disease

Nearly half of women at a high lifetime risk for breast cancer undergo routine mammograms at practices with onsite breast MR imaging capabilities, but MRI screenings are being vastly underused in the population, reaching just 6.6 percent of high-risk patients, a study in the Journal of Women’s Health states.

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Insurer approves, then denies MRI, forcing man to pay $2,340 out-of-pocket

Patients’ wishes and insurance companies’ approval don’t always line up when it comes to coverage for imaging procedures, the Philadelphia Inquirer reported this week.

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When CT scans are negative for patients with blunt neck injuries, follow-up MRI provides little value

When patients experience blunt neck injuries—after a car accident, for example—follow-up MRI is not necessary after a CT scan comes back negative for spine instability, according to a new study published in JAMA Surgery.