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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Supplemental, short-protocol MRI a cost-effective addition for stroke patients in the ED

Head CT can sometimes miss the early signs of minor strokes, German scientists wrote in European Radiology. 

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Contrast-enhanced mammography as effective as MRI at evaluating newly diagnosed breast cancer

CESM utilizing iodine offers a sound alternative to magnetic resonance, illuminating lesions otherwise invisible on a regular mammogram. 

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Abdominal MRI intervention helps drop respiratory motion and image quality degradation

Language barriers can pose problems in the MRI suite, where abdominal exams come with carefully choreographed breathing instructions, NYU experts wrote in JACR. 

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Structural MRI shows promise predicting relapse among patients battling opioid addiction

The experimental diagnostic method combines imaging and machine learning to seek patterns in functional connectivity and brain structure data. 

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Annual MRI surveillance of low-risk prostate cancer drops biopsies while preserving life expectancy

NYU imaging experts created a simulation model to determine the most cost-effective method of monitoring the disease. 

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Liver MR imaging specialist eyes $75M initial public offering on the Nasdaq

Founded in 2012, Perspectum's flagship FDA-cleared software LiverMultiScan aids in the detection of disease using scans of the organ.

Screening with MRI, targeted biopsies could potentially cut prostate cancer overdiagnoses in half

The reduced biopsy rate and potential downstream savings from less overtreatment offer cost savings that may offset MRI's price tag, experts wrote in the New England Journal of Medicine.

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Portable MRI-maker Hyperfine to go public as $580M company, plus more radiology vendor news

Also, Philips collaborates on new ultra-fast MRI protocol, Intelerad acquiring Heart Imaging Technologies, and 2 new FDA clearances.

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Around the web

Cardiovascular Business
Global shortage of nuclear imaging isotopes may be over

The nuclear imaging isotope shortage of molybdenum-99 may be over now that the sidelined reactor is restarting. ASNC's president says PET and new SPECT technologies helped cardiac imaging labs better weather the storm.

Cardiovascular Business
‘A huge win’: CMS significantly increases Medicare payments for cardiac CT

CMS has more than doubled the CCTA payment rate from $175 to $357.13. The move, expected to have a significant impact on the utilization of cardiac CT, received immediate praise from imaging specialists.

Cardiovascular Business
GE HealthCare moves PET/CT scanner production to United States

The all-in-one Omni Legend PET/CT scanner is now being manufactured in a new production facility in Waukesha, Wisconsin.

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