TY - GEN
T1 - Improved strain measuring using fast strain-encoded cardiac MR
AU - Motaal, Abdallah G.
AU - Osman, Nael F.
PY - 2011
Y1 - 2011
N2 - The strain encoding (SENC) technique encodes regional strain of the heart into the acquired MR images and produces two images with two different tunings so that longitudinal strain, on the short-axis view, or circumferential strain on the long-axis view, are measured. Interleaving acquisition is used to shorten the acquisition time of the two tuned images by 50%, but it suffers from errors in the strain calculations due to inter-tunings motion of the heart, which is the motion between two successive acquisitions. In this work, a method is proposed to correct for the inter-tunings motion by estimating the motioninduced shift in the spatial frequency of the encoding pattern, which depends on the strain rate. Numerical data is generated to test the proposed method and real images of human subjects are used for validation The results show an improvement in strain calculations so as to relax the imaging constraints on spatial and temporal resolutions and improve image quality.
AB - The strain encoding (SENC) technique encodes regional strain of the heart into the acquired MR images and produces two images with two different tunings so that longitudinal strain, on the short-axis view, or circumferential strain on the long-axis view, are measured. Interleaving acquisition is used to shorten the acquisition time of the two tuned images by 50%, but it suffers from errors in the strain calculations due to inter-tunings motion of the heart, which is the motion between two successive acquisitions. In this work, a method is proposed to correct for the inter-tunings motion by estimating the motioninduced shift in the spatial frequency of the encoding pattern, which depends on the strain rate. Numerical data is generated to test the proposed method and real images of human subjects are used for validation The results show an improvement in strain calculations so as to relax the imaging constraints on spatial and temporal resolutions and improve image quality.
KW - Cardiac magnetic resonance imaging
KW - interleaving acquisition
KW - strain encoding
KW - tissue deformation
UR - http://www.scopus.com/inward/record.url?scp=80055036815&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80055036815&partnerID=8YFLogxK
U2 - 10.1109/ISBI.2011.5872637
DO - 10.1109/ISBI.2011.5872637
M3 - Conference contribution
AN - SCOPUS:80055036815
SN - 9781424441280
T3 - Proceedings - International Symposium on Biomedical Imaging
SP - 1289
EP - 1294
BT - 2011 8th IEEE International Symposium on Biomedical Imaging
T2 - 2011 8th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, ISBI'11
Y2 - 30 March 2011 through 2 April 2011
ER -