TY - GEN
T1 - A technique for improving tag contrast persistence in SSFP MRI imaging using adaptive FLIP angle
AU - Ibrahim, El Sayed H.
AU - Osman, Noel F.
PY - 2004/12/1
Y1 - 2004/12/1
N2 - Steady State Free Precession (SSFP) proved to be an efficient fast MR imaging technique due to its short acquisition time and high SNR. Myocardium tagging can be combined with SSFP, so that the deformation of tag lines allows for measurement of myocardial wall motion. However, at later imaging time, the tagging contrast deteriorates, which makes it harder to track the tag lines. We introduce a new technique that adaptively adjusts the flip angle at each RF pulse in order to keep the tagging contrast constant, and hence maintain the Tag Contrast to Noise Ratio (Tag-CNR) throughout the imaging period. A computer simulation was done to validate and compare between the tagging contrast with SSFP and that of Spoiled Gradient Echo (SPGR), where the tagging contrast is made constant during the cine sequences in both methods. Preliminary results show potential superiority of SSFP in yielding higher contrast than SPGR.
AB - Steady State Free Precession (SSFP) proved to be an efficient fast MR imaging technique due to its short acquisition time and high SNR. Myocardium tagging can be combined with SSFP, so that the deformation of tag lines allows for measurement of myocardial wall motion. However, at later imaging time, the tagging contrast deteriorates, which makes it harder to track the tag lines. We introduce a new technique that adaptively adjusts the flip angle at each RF pulse in order to keep the tagging contrast constant, and hence maintain the Tag Contrast to Noise Ratio (Tag-CNR) throughout the imaging period. A computer simulation was done to validate and compare between the tagging contrast with SSFP and that of Spoiled Gradient Echo (SPGR), where the tagging contrast is made constant during the cine sequences in both methods. Preliminary results show potential superiority of SSFP in yielding higher contrast than SPGR.
UR - http://www.scopus.com/inward/record.url?scp=17144365117&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=17144365117&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:17144365117
SN - 0780383885
SN - 9780780383883
T3 - 2004 2nd IEEE International Symposium on Biomedical Imaging: Macro to Nano
SP - 1051
EP - 1054
BT - 2004 2nd IEEE International Symposium on Biomedical Imaging
T2 - 2004 2nd IEEE International Symposium on Biomedical Imaging: Macro to Nano
Y2 - 15 April 2004 through 18 April 2004
ER -