Comparison of functional MRI image realignment tools using a computer-generated phantom. Export

@article{citeulike:882841, abstract = {This study discusses the development of a computer-generated phantom to compare the effects of image realignment programs on functional MRI (fMRI) pixel activation. The phantom is a whole-head MRI volume with added random noise, activation, and motion. It allows simulation of realistic head motions with controlled areas of activation. Without motion, the phantom shows the effects of realignment on motion-free data sets. Prior to realignment, the phantom illustrates some activation corruption due to motion. Finally, three widely used realignment packages are examined. The results showed that the most accurate algorithms are able to increase specificity through accurate realignment while maintaining sensitivity through effective resampling techniques. In fact, accurate realignment alone is not a powerful indicator of the most effective algorithm in terms of true activation.}, address = {Department of Radiological Sciences, Vanderbilt University, Nashville, Tennessee 37232-2675, USA. victoria.morgan@vanderbilt.edu}, author = {Morgan, V. L. and Pickens, D. R. and Hartmann, S. L. and Price, R. R.}, citeulike-article-id = {882841}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/11550243}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=11550243}, comment = {comparison of realign tools using a phantom}, issn = {0740-3194}, journal = {Magn Reson Med}, keywords = {fmri, realign}, month = {September}, number = {3}, pages = {510--514}, posted-at = {2006-10-03 21:08:19}, priority = {2}, title = {Comparison of functional MRI image realignment tools using a computer-generated phantom.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/11550243}, volume = {46}, year = {2001} }

TY - JOUR ID - citeulike:882841 L3 - citeulike-article-id:882841 N2 - This study discusses the development of a computer-generated phantom to compare the effects of image realignment programs on functional MRI (fMRI) pixel activation. The phantom is a whole-head MRI volume with added random noise, activation, and motion. It allows simulation of realistic head motions with controlled areas of activation. Without motion, the phantom shows the effects of realignment on motion-free data sets. Prior to realignment, the phantom illustrates some activation corruption due to motion. Finally, three widely used realignment packages are examined. The results showed that the most accurate algorithms are able to increase specificity through accurate realignment while maintaining sensitivity through effective resampling techniques. In fact, accurate realignment alone is not a powerful indicator of the most effective algorithm in terms of true activation. IS - 3 JF - Magn Reson Med SN - 0740-3194 AD - Department of Radiological Sciences, Vanderbilt University, Nashville, Tennessee 37232-2675, USA. victoria.morgan@vanderbilt.edu EP - 514 TI - Comparison of functional MRI image realignment tools using a computer-generated phantom. VL - 46 SP - 510 KW - fmri KW - realign N1 - comparison of realign tools using a phantom AU - Morgan, VL AU - Pickens, DR AU - Hartmann, SL AU - Price, RR PY - 2001/09// UR - http://view.ncbi.nlm.nih.gov/pubmed/11550243 ER -