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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Example of a RF burn from an MRI scan where a sedated patient's identification bracelet was touching their skin during an exam. Image courtesy of RSNA. https://pubs.rsna.org/doi/10.1148/radiol.09090637

Battling Burns in MRI

While MRI is often considered one of the safer imaging modalities due to its lack of ionizing radiation, other dangers remain for patients, with thermal burns being a chief concern. 

September 11, 2014
GE SIGNA PET/MRI

GE Healthcare’s New SIGNA™ PET/MR Pending 510(k) Approval

Waukesha, WI — August 4, 2014 — Today GE Healthcare announced that the first integrated, simultaneous, time-of-flight (TOF) capable, whole body SIGNA PET/MR* is 510(k) pending at the FDA. Powered by simultaneous image acquisition from GE’s latest 3.0 Tesla magnetic resonance (MR) technology and innovative positron emission tomography (PET) technology, the SIGNA PET/MR represents a new chapter in helping clinicians achieve improved scan efficiency that may lead to more effective treatment paths for clinicians to offer their patients, particularly for oncology, neurology, and cardiology.

August 6, 2014
Star Valley Medical Center

Increased Access, Dependability and Patient Satisfaction with a Fixed MRI at Star Valley CAH

Sponsored by Hitachi Healthcare Americas

Among the many requirements a hospital must meet to achieve and maintain the designation of Critical Access Hospital (CAH), the hospital must be fairly remote and furnish 24-hour emergency care services seven days a week, using either on-site or on-call staff.

April 16, 2014
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Around the web

Cardiovascular Business
Medicare drops AUC requirement for advanced imaging, ASNC celebrates

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

Cardiovascular Business
Cardiology, radiology groups urge insurance provider to rethink imaging policy

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

Cardiovascular Business
Radiology AI company gains FDA clearance for new CT offerings focused on PE, stroke

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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