W. Patricia Bandettini1, Christine Mancini2, Sujata M. Shanbhag2, Jennifer Lynn Henry2, Margaret M. Lowery2, Marcus Y. Chen2, and Adrienne E. Campbell-Washburn2
1NIH/NHLBI, Bethesda, MD, United States, 2NATIONAL INSTITUTES OF HEALTH/NHLBI, BETHESDA, MD, United States
1NIH/NHLBI, Bethesda, MD, United States, 2NATIONAL INSTITUTES OF HEALTH/NHLBI, BETHESDA, MD, United States
This preliminary evaluation of in vivo metallic device artifacts
suggests that lower field strength (0.55T) CMR may lend some advantage in
decreasing the susceptibility artifact associated with common cardiovascular implanted
devices compared to conventional 1.5T field strength imaging.
Figure 1. Sternal wire and bioprosthetic aortic valve
artifact appear more prominent at 1.5T (left) compared to 0.55T field strength
(right).
Figure 5. Example pacemaker leads for two patients (4-chamber
on top, short-axis ventricle on bottom) imaged at 1.5T and 0.55T. The artifact
caused by the lead implants was reduced at 0.55T. In addition, the de-phased
blood artifact visible in the 4-chamber view at 1.5T is diminished at 0.55T.
