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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Startup OEM expands pediatric use cases for portable MRI

Portable MRI maker Hyperfine is touting a new capability in its Swoop scanner that may appeal to pediatric neurologists and neurosurgeons as well as neuroradiologists.

Siemens headquarters

Maturing partnership between OEM and AI shop yielding MRI advances

Siemens Healthineers has successfully integrated image-reconstruction software developed by a U.S. healthcare AI startup to increase sharpness and decrease noise in MR images captured during fast scanning sequences.

FDA gives nod to MRI acceleration software equipped with AI

A medical imaging OEM has been cleared to market MRI image reconstruction software that, according to the company, sacrifices nothing in image quality despite allowing patients to be scanned up to three times faster than conventional methods. 

Functional MRI clarifies effects of vaping vs. smoking inside the lungs

Cigarette smoke inhibits pulmonary perfusion while nicotine-delivering vapors from e-cigarettes do the opposite, actually increasing blood flow in the lungs. 

Lightweight, short-stature MR scanner cleared

The FDA has greenlit a whole-body MRI machine that uses deep learning and advanced image processing to wring “elevated image quality” from a magnet with only 0.55 Tesla field strength.

MRI confirmed as gold standard for pre-biopsy detection of prostate cancer—but that’s ‘not the end of the story’

A clinical trial pitting MRI against a burgeoning PET/CT technique has found the de facto defending champion better at revealing the presence of any grade of prostate cancer.

Low back imaging: All-in-one MR makes strong showing vs. added CT

Two emerging MRI techniques show promise as all-in-one imaging tests for patients with pain in and below the lower back due to changes in the sacroiliac joint.

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IDE granted for clinical research of MRI-guided focused ultrasound

The FDA has cleared a focused-ultrasound developer to compare the safety and efficacy of acoustic energy for treating prostate cancer against the more conservative approach of active surveillance.

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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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