- Poster presentation
- Open Access
Evaluation of 3-dimensional left ventricular velocities with cardiac MR imaging using navigator gated high temporal resolution tissue phase mapping
© Codreanu et al; licensee BioMed Central Ltd. 2009
- Published: 28 January 2009
- Myocardial Velocity
- Cardiac Magnetic Resonance Examination
- Tissue Phase Mapping
- Arterial Pressure Wave
- Left Ventricular Base
Identification of regional myocardial dysfunction with adequate temporal and spatial resolution is important for diagnosis and management of cardiovascular disease. Assessment of regional myocardial velocities allows 3-dimensional quantification of left ventricular function and carries independent prognostic information.
The aim of this study was to use navigator gated tissue phase mapping with high temporal resolution to obtain accurate normative data of left ventricular velocities, to assess normal patterns of left ventricular motion and to evaluate the reproducibility of this technique.
Cardiac magnetic resonance examinations were performed on a 1.5 Tesla MR clinical scanner (Sonata; Siemens Medical Solutions, Erlangen, Germany). Cardiac gated, phase contrast measurements using respiratory navigator with a temporal resolution of 13.8 ms were obtained on two separate occasions on 13 healthy male subjects (age 22 ± 3 years) three weeks apart. Three short axis images were obtained for the left ventricular base, mid-ventricle and apex. Each short axis acquisition took approximately 3 – 5 minutes, with an average of 60 – 70 phases per cardiac cycle. Subsequent normative velocities were obtained for radial, circumferential and longitudinal motion.
Navigator gated tissue phase mapping with high temporal resolution is a reproducible technique to evaluate detailed regional myocardial wall motion and provides valuable and comprehensive information for quantifying myocardial velocities. The technique allowed us to obtain new details of left ventricular motion patterns and may prove to be a powerful tool for assessing subtle changes in myocardial function in cardiac disease.
This article is published under license to BioMed Central Ltd.