TY - JOUR
T1 - Myocardial tagging with steady state free precession techniques and semi-automatic postprocessing - Impact on diagnostic value
AU - Johnson, Thorsten R.C.
AU - Bayrhof, Nicole
AU - Huber, Armin
AU - Kuijer, Joost P.A.
AU - Luechinger, Roger
AU - Dietrich, Olaf
AU - Stoevesandt, Dietrich
AU - Pedersen, Dorthe
AU - Reiser, Maximilian F.
AU - Schoenberg, Stefan O.
PY - 2007/9
Y1 - 2007/9
N2 - Our aim was to determine the diagnostic value of myocardial tagging sequences with regard to the evaluable share of the cardiac cycle. Thirty-three patients were examined at 1.5 T using tagging sequences with gradient-echo (GRE) readout, 18 patients at 1.5 T with steady-state free precession (SSFP), and 11 patients at 3 T using GRE. Two observers graded image quality and determined the share of the cardiac cycle for which postprocessing could be performed (1, optimal; 2, little interaction; 3, whole cycle assessable; 4, diastole non-assessable; 5, systole incomplete; 6, non-diagnostic). With GRE at 1.5 T, median image quality was 4.0 (95% CI 4.0-5.0), while it was significantly better with 2.0 (2.0-3.0) using the SSFP technique and similar at 3 T with 2.9 (1.7-3.5). With GRE at 1.5 T, systole could be assessed in 69% of patients, and an evaluation of the whole cardiac cycle was not possible. With the SSFP sequence at 1.5 T and GRE at 3 T, an evaluation of the whole cardiac cycle was possible in 71% and 70% of the patients, respectively, and systole was assessable in all patients. Tagging sequences with SSFP readout at 1.5 T make a semi-automatic evaluation of the whole cardiac cycle feasible in a large share of patients.
AB - Our aim was to determine the diagnostic value of myocardial tagging sequences with regard to the evaluable share of the cardiac cycle. Thirty-three patients were examined at 1.5 T using tagging sequences with gradient-echo (GRE) readout, 18 patients at 1.5 T with steady-state free precession (SSFP), and 11 patients at 3 T using GRE. Two observers graded image quality and determined the share of the cardiac cycle for which postprocessing could be performed (1, optimal; 2, little interaction; 3, whole cycle assessable; 4, diastole non-assessable; 5, systole incomplete; 6, non-diagnostic). With GRE at 1.5 T, median image quality was 4.0 (95% CI 4.0-5.0), while it was significantly better with 2.0 (2.0-3.0) using the SSFP technique and similar at 3 T with 2.9 (1.7-3.5). With GRE at 1.5 T, systole could be assessed in 69% of patients, and an evaluation of the whole cardiac cycle was not possible. With the SSFP sequence at 1.5 T and GRE at 3 T, an evaluation of the whole cardiac cycle was possible in 71% and 70% of the patients, respectively, and systole was assessable in all patients. Tagging sequences with SSFP readout at 1.5 T make a semi-automatic evaluation of the whole cardiac cycle feasible in a large share of patients.
KW - Cardiac mri
KW - Myocardial tagging
KW - Wall motion
UR - http://www.scopus.com/inward/record.url?scp=34548071077&partnerID=8YFLogxK
U2 - 10.1007/s00330-007-0639-5
DO - 10.1007/s00330-007-0639-5
M3 - Article
C2 - 17443331
AN - SCOPUS:34548071077
VL - 17
SP - 2218
EP - 2224
JO - European Radiology
JF - European Radiology
SN - 0938-7994
IS - 9
ER -