Correction of misaligned slices in multi-slice cardiovascular magnetic resonance using slice-to-volume registration

A popular technique to reduce respiratory motion for cardiovascular magnetic resonance is to perform a multi-slice acquisition in which a patient holds their breath multiple times during the scan. The feasibility of rigid slice-to-volume registration to correct for misalignments of slice stacks in such images due to differing breath-hold positions is explored. Experimental results indicate that slice-to-volume registration can compensate for the typical misalignments expected. Correction of slice misalignment results in anatomically more correct images, as well as improved left ventricular volume measurements. The interstudy reproducibility has also been improved reducing the number of samples needed for cardiac MR studies

Columns 1 and 2 show a slice of the motion-free and misaligned SA image for 3 cardiac phases

Column 3 shows the difference image between the motion-free and misaligned SA slice before registration, and column 4 shows the difference image between the motion-free and misaligned slice after registration.<p><b>Copyright information:</b></p><p>Taken from "Correction of misaligned slices in multi-slice cardiovascular magnetic resonance using slice-to-volume registration"</p><p>http://www.jcmr-online.com/content/10/1/13</p><p>Journal of Cardiovascular Magnetic Resonance 2008;10(1):13-13.</p><p>Published online 29 Feb 2008</p><p>PMCID:PMC2292180.</p><p></p

Visualization of the left ventricular wall from the motion-free SA image, and the misaligned SA image before and after registration respectively, for 3 of the cardiac phases

The different colours represent the 6 stacks acquired at different breath-holds.<p><b>Copyright information:</b></p><p>Taken from "Correction of misaligned slices in multi-slice cardiovascular magnetic resonance using slice-to-volume registration"</p><p>http://www.jcmr-online.com/content/10/1/13</p><p>Journal of Cardiovascular Magnetic Resonance 2008;10(1):13-13.</p><p>Published online 29 Feb 2008</p><p>PMCID:PMC2292180.</p><p></p