Reproducibility of strain and twist measurements calculated using CSPAMM tagging
نویسندگان
چکیده
Methods 12 healthy volunteers (6 males, mean age 33±7 years) underwent CMR studies on a 1.5T system (Intera CV, Philips Healthcare, The Netherlands). Tagged CMR images were acquired at the apex, mid-ventricle and base with a CSPAMM pulse sequence (field of view: 300mm, matrix 128 x 128, slice thickness 10mm, tag separation 8mm, 18 phases, typical TR/TE 30ms/6ms, flip angle 25 degrees). In 6 volunteers repeat data sets were acquired after a mean interval of 8±3 days. Data were analysed by two independent observers using Tagtrack software (Gyrotools, CH). Circumferential Langranian strain, radial Langranian strain and rotation were calculated for the three short axis slices. Endocardial and epicardial borders were drawn, and a midline calculated automatically. Left ventricular twist was calculated by subtracting the basal rotation from the apical rotation. The mean difference between paired measurements, the standard deviation (SD) of the differences and the coefficient of variability (Co-V) were calculated.
منابع مشابه
Numbers needed to detect a significant change in myocardial strain and left ventricular twist measured by complementary spatial modulation of magnetization (CSPAMM)
Methods 12 healthy volunteers (6 male, mean age 33±15 years) underwent CMR studies on two separate occasions (mean interval of 8±3 days) using an identical CSPAMM pulse sequence with images acquired in 3 short axis slices at the apex, mid-ventricle and base. Data were analysed using harmonic phase analysis (Tag Track, Gyrotools, Zurich, CH). Circumferential Lagrangian strain, radial Lagrangian ...
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