PURPOSE: To prospectively determine the feasibility and accuracy of strain-encoded (SENC) magnetic resonance imaging (MRI) for the characterization of the right ventricular free wall (RVFW) strain and timing of contraction at 3.0 Tesla (3T) MRI. MATERIALS AND METHODS: In 12 healthy volunteers the RVFW was divided into three segments (anterior, lateral, and inferior) in each of three short-axis (SA) slices (apical, mid, and basal) and into three segments (apical, mid, and basal) in a four-chamber view. The study was repeated on a different day and interobserver and interstudy agreements were evaluated. RESULTS: Maximal systolic longitudinal strain values were highest at the apex and base, with a pronounced decrease in the medial segments (apex: -19.1% +/- 1.4; mid: -17.4% +/- 2; base: -19.4% +/- 2.4, P < 0.001), and maximal systolic circumferential strain showed the highest values at the apex (apex: -18.1% +/- 1.7; mid: -17.6% +/- 1.2; base: -16.6% +/- 0.9, P < 0.001). Peak systolic longitudinal and circumferential shortening occurred earliest at the apex compared to the mid-ventricle and base. Excellent interobserver and interstudy correlation and agreement were observed. CONCLUSION: The use of SENC MRI for the assessment of normal RV contraction pattern is feasible and accurate in 3T MRI. (c) 2008 Wiley-Liss, Inc.
PURPOSE: To prospectively determine the feasibility and accuracy of strain-encoded (SENC) magnetic resonance imaging (MRI) for the characterization of the right ventricular free wall (RVFW) strain and timing of contraction at 3.0 Tesla (3T) MRI. MATERIALS AND METHODS: In 12 healthy volunteers the RVFW was divided into three segments (anterior, lateral, and inferior) in each of three short-axis (SA) slices (apical, mid, and basal) and into three segments (apical, mid, and basal) in a four-chamber view. The study was repeated on a different day and interobserver and interstudy agreements were evaluated. RESULTS: Maximal systolic longitudinal strain values were highest at the apex and base, with a pronounced decrease in the medial segments (apex: -19.1% +/- 1.4; mid: -17.4% +/- 2; base: -19.4% +/- 2.4, P < 0.001), and maximal systolic circumferential strain showed the highest values at the apex (apex: -18.1% +/- 1.7; mid: -17.6% +/- 1.2; base: -16.6% +/- 0.9, P < 0.001). Peak systolic longitudinal and circumferential shortening occurred earliest at the apex compared to the mid-ventricle and base. Excellent interobserver and interstudy correlation and agreement were observed. CONCLUSION: The use of SENC MRI for the assessment of normal RV contraction pattern is feasible and accurate in 3T MRI. (c) 2008 Wiley-Liss, Inc.
Authors: Rochus K Voeller; Abdulhameed Aziz; Hersh S Maniar; Nneka N Ufere; Ajay K Taggar; Noel J Bernabe; Brian P Cupps; Marc R Moon Journal: Am J Physiol Heart Circ Physiol Date: 2011-09-16 Impact factor: 4.733
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Authors: Jonathan D Suever; Gregory J Wehner; Linyuan Jing; David K Powell; Sean M Hamlet; Jonathan D Grabau; Dimitri Mojsejenko; Kristin N Andres; Christopher M Haggerty; Brandon K Fornwalt Journal: IEEE Trans Med Imaging Date: 2016-12-29 Impact factor: 10.048
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