Naslov
Aortic strain measurement with MRI – Does intraobserver variability improve with training?

Autori
Hrabak Paar, Maja ; Bremerich, Jens ; Redheuil, Alban ; Heye, Tobias

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Online Abstract Book of the Swiss Congress of Radiology 2015 / - , 2015

Skup
Swiss Congress of Radiology 2015

Mjesto i datum
Basel, Švicarska, 04.06.2015. - 06.06.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
variability; aortic stiffness; aortic strain; traning

Sažetak
Purpose: Aortic strain is a widely used marker of aortic stiffness. Low variability of measurements is required for clinical and research purposes. In this study we evaluated the influence of self- paced training in ArtFun software on the intraobserver variability of aortic strain measurement using magnetic resonance imaging (MRI). Methods and Materials: Fifteen patients (11 males, age 39-78 years) with arterial hypertension underwent cardiovascular MRI using a 3.0 Tesla MRI scanner. One axial gradient-echo cine image (TR/TE 50.8/4.2, slice thickness 6mm, 50 cardiac phases) of the chest at the level of the right pulmonary artery was acquired three times within an examination. To calculate aortic strain, largest and smallest cross-sectional area of the aorta was measured using ArtFun software three times in the ascending aorta by the same reader with 5 years of experience in cardiovascular imaging, before and after 3 weeks of self-paced training in abovementioned software. The paired-sampled sign test was used to compare the differences in the coefficient of variation (CV) of aortic strain measurement before and after training. Results: The mean intraobserver CV before training was 11% (median 3.4%, range 0-55%), which was significantly higher than mean CV of 5% after training (median 1.7%, range 0-26% ; p=0.01). The precision of the measurement also improved (SD 15% before training vs. 5% after training). Conclusion: Even though reader was experienced, results show that with short training period results for reproducibility and precision improved significantly. The reader should familiarize with new software in order to achieve lowest possible intraobserver variability.

Izvorni jezik
Engleski

Znanstvena područja
Kliničke medicinske znanosti

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