- Meeting abstract
- Open Access
1107 Quantification of left ventricular strain using turbo field echo produces less variable data than using fast field echo
© Pahlm-Webb et al; licensee BioMed Central Ltd. 2008
- Published: 22 October 2008
- Interobserver Variability
- Wall Function
- Echo Train Length
- Fast Field
- Breathing Artifact
VE-MRI images from 10 healthy volunteers (5 male and 5 female) were obtained in 2-, 3-, and 4-chamber projections. The TFE echo train length was 5. The myocardium was manually outlined by two independent and blinded observers in end-diastole in TFE images, and by one observer in both TFE and FFE images. In-house developed software http://segment.heiberg.se was used for automatic tracking of the myocardium and calculated strain for each of the 17 AHA left ventricular segments. Maximum left ventricular strain over the cardiac cycle was determined, and intra- and interobserver variability for each of the 17 sections were determined.
There was a good agreement between TFE and FFE strain, and TFE strain was reproducible between observers. It takes a relatively long time to acquire the FFE sequence, and the patient is unable to hold their breath for that time. Breathing artifacts make the images difficult to interpret. TFE is a faster image acquisition method that makes it possible to acquire the images in one breathhold, which leads to fewer breathing artifacts, and therefore makes the images easier to interpret. TFE would therefore be a better choice for clinical routine. The in-house developed software http://segment.heiberg.se automatically tracks the myocardium and calculates strain for each of the 17 AHA segments within seconds.
Strain acquired by TFE VE-MRI shows good agreement with FFE strain, and low interobserver variability. Both the acquisition and the evaluation method for strain measurement by TFE VE-MRI are very fast, and therefore suitable for clinical use.
This article is published under license to BioMed Central Ltd.