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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With the shortage, which pertains specifically to all formulations and concentrations of GE Healthcare’s Omnipaque (iohexol), expected to last until mid-June, several organizations have eluded that conservation efforts are of critical importance.#contrastshortage #CTcontrast #iodinatedcontrast

Preserving contrast media supplies: 7 ACR recommendations

With the shortage, which pertains specifically to all formulations and concentrations of GE Healthcare’s Omnipaque (iohexol), expected to last until mid-June, several organizations have alluded that conservation efforts are of critical importance.

May 9, 2022
Ischemic stroke CT imaging. Images courtesy of RSNA

Stroke care still lags among certain Medicare populations

Despite increases of 250% for CTA and 428% for CTP, researchers observed lower rates of neuroimaging utilization among rural residents, older individuals (80 years and above), women and Black patients.

April 27, 2022
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Misuse of public imaging data is producing 'overly optimistic' results in machine learning research

 "This research aims to raise a red flag regarding naive off-label usage of open-access data in the development of machine-learning algorithms," experts involved in the study said.

March 23, 2022
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How Secure Is That Scanner?

In a world of networked medical devices, it’s not hard to imagine a radiology-heavy cyberattack that is not only malicious but also ingenious.
 

June 25, 2019
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Around the web

Cardiovascular Business
FDA warns against use of troubled heart devices, citing ‘continued concerns’ after multiple recalls

The agency is urging healthcare providers to transition away from these devices and seek out alternatives. It is even working with other manufacturers to try and get similar products on the market as quickly as possible. 

Cardiovascular Business
The push for an independent cardiology board continues

Jeffrey Kuvin, MD, one of the leading voices behind efforts to create a new Board of Cardiovascular Medicine, spoke with Cardiovascular Business about where things stand today.

AI in Healthcare
Biden Administration itemizes AI accomplishments to date

Half a year after President Biden officially directed federal agencies in the executive branch’s bailiwick to “seize the promise and manage the risks” of AI, the White House has posted a status report.

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