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September 23, 2010

MRIs Could Be Used for Endovascular Stent Surveillance

MRI scans can be used for the routine surveillance of great vessel stents, according to a study published in the American Journal of Roentgenology. Endovascular stents can imaged using computed tomography, but involves the risk of ionising radiation exposure. Convention

By cms admin

MRI scans can be used for the routine surveillance of great vessel stents, according to a study published in the American Journal of Roentgenology.

Endovascular stents can imaged using computed tomography, but involves the risk of ionising radiation exposure.

Conventional angiography can also be used, but as an invasive procedure it is unsuitable for routine follow-up.

For the study, the researchers imaged three contemporary great vessel stent materials (nitinol, platinum-iridium and stainless steel) implanted in an aorta model, using computed tomography, conventional angiography and ten MRI sequences.

The findings showed that computed tomography and angiography demonstrated diagnostic accuracy for all the stents, and certain MRI sequences were found to accurately assess the stent stenosis.

Andrew M Taylor, the study’s lead author, said that using MRIs would allow more frequent assessment of stents with lower risk to patients, and represent a significant change in clinical practice.

Great vessel stents are commonly used for the treatment of congenital heart defects.

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