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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Functional MRI shows war veterans’ brains compensating for blast-related TBI

The brains of war veterans who have suffered blast-related mild traumatic brain injury (mTBI) appear to ward off long-term memory loss by changing connectivity across multiple regions, according to a pilot study published online Dec. 5 in Brain Imaging and Behavior.

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AI trained to detect, measure aneurysms in MRA images

A convolutional neural network (CNN) can detect and measure cerebral aneurysms in magnetic resonance angiography (MRA) images, according to findings published in the Journal of Digital Imaging.

RSNA 2018: What fMRI tells us about men with internet gaming disorder

The brains of men with internet gaming disorder (IGD) showcase issues not present in the brains of women with the same disorder, according to a study presented Nov. 28 at RSNA 2018 in Chicago.

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VR application helps patients overcome MRI anxiety, claustrophobia

Researchers from the University of Michigan (UM) have developed a virtual reality (VR) smartphone application designed to help patients avoid feeling claustrophobic by replicating what happens during an MRI.

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Diffusion-weighted MRI comparable, superior for differentiating between pulmonary lesion types

Diffusion-weighted MRI (DW-MRI) is a similar or superior imaging modality compared to fluorine 18-fluorodeoxyglucose PET/CT (18F–FDG PET/CT), for diagnosing between malignant and benign pulmonary lesions, according to the results of a meta-analysis published in Radiology.

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RSNA 2018: MRI scans reveal what football does to young athletes’ brains

Repeated blows to the head can cause changes to the brains of young football players, according to a new study presented at RSNA 2018 in Chicago.

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New Zealand-based promoter mandates pre-fight MRIs for all its boxers

Just weeks after charity fighter Kain Parsons was fatally injured in a Christchurch, New Zealand, boxing ring, sports promoter Duco Events has announced it’s implementing obligatory pre-fight MRIs for all of its boxers.

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NYU, Facebook release massive MRI dataset as part of ongoing AI project

The New York University (NYU) School of Medicine's department of radiology is releasing a knee MRI dataset of more than 1.5 million anonymous images as part of its ongoing collaboration with Facebook to make MRI scans 10 times faster with artificial intelligence (AI).

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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.