Optimal Acquisition Settings for Speckle Tracking Echocardiography–Derived Strains in Infants: An In Vitro Study

Khan, Umael; Hjertaas, Johannes Just; Greve, Gottfried; Matre, Knut

doi:10.1016/j.ultrasmedbio.2016.02.015

Cited by 14 publications

(23 citation statements)

References 32 publications

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“…The FR/HR ratio results in 0.25 up to 0.42 for the group of Rösner et al, in which global LPSS was not significantly different from a reference groupwith much higher FR 28. In the present study, we had an adequate temporal resolution with good reliability for the AFR group according to published recommendations 29,30. Temporal resolution with a FR/ HR ratio of 0.42 was much lower in our DICOM FR group.…”

supporting

confidence: 48%

“…In our present study, we obtained a FR/HR ratio of 0.42 and 0.90 for the DICOM FR and AFR group, respectively. In the present study, we had an adequate temporal resolution with good reliability for the AFR group according to published recommendations 29,30. The FR/HR ratio results in 0.25 up to 0.42 for the group of Rösner et al, in which global LPSS was not significantly different from a reference groupwith much higher FR 28.…”

mentioning

confidence: 69%

“…[14][15][16][17][18][19][20] We have previously demonstrated feasibility and reproducibility with archived Digital Imaging and Communications in Medicine (DICOM) data with 30 and 60 frames per second (fps), 21,22 while others have been working with the original FR frequency ranging between 44 and 150 fps. [28][29][30] Despite the reported differences and approaches to temporal resolution assessment, there is a paucity of studies that have evaluated the actual strain values with different FR's in the fetal population. [28][29][30] Despite the reported differences and approaches to temporal resolution assessment, there is a paucity of studies that have evaluated the actual strain values with different FR's in the fetal population.…”

Section: Recent Evaluation Of Deformation Values By Two-dimensional Stementioning

confidence: 99%

“…[23][24][25][26][27] Reproducibility has also been shown to be most robust when cine loops are obtained with a specific FR-to-heart rate (HR) ratio. [28][29][30] Despite the reported differences and approaches to temporal resolution assessment, there is a paucity of studies that have evaluated the actual strain values with different FR's in the fetal population.…”

Section: Recent Evaluation Of Deformation Values By Two-dimensional Stementioning

confidence: 99%

“…When frames were corrected for fetal heart rate in our present study, we achieved a mean temporal resolution of 25 fpc in the DICOM FR group and 54 fpc in the AFR group. In a recently published in vitro study, Khan et al ascertained that low FR led to less accurate measurements 29. As a conclusion with regard to high accuracy, they recommend a FR/HR ratio >1.…”

mentioning

confidence: 99%

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Wall motion tracking in fetal echocardiography—Application of low and high frame rates for strain analysis

et al. 2018

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Objective: Compared to adults, fetal heart rates (HR) are elevated necessitating higher frame rates (FR) for strain analysis by speckle tracking echocardiography. The aim of this study was to investigate the influence of high FR compared to low FR on strain analysis in 2D speckle tracking. Methods: Fetal echocardiography was prospectively performed and acquired from the apical or basal four-chamber views of the heart. Images were optimized for clear delineation of myocardial walls and stored in either raw Digital Imaging and Communications in Medicine (DICOM) cine-loop format for offline analysis with a low FR of 60 frames per second (fps) or in the original FR (acoustic FR = AFR). For each loop, right (RV) and left (LV) ventricular fetal longitudinal peak systolic strain (LPSS) values were assessed by 2D Wall Motion tracking.Results: One hundred and three healthy fetuses were included with a mean gestational age of 26.3 ± 5.5 weeks. Mean AFR was 127 ± 26 fps. A mean FR/HR ratio was assessed of 0.42 and 0.90 between the low FR and AFR group, respectively. Relating to LPSS values, there was a significant difference between low FR and AFR for both ventricles (LV: −16.5% ± 3.9% (low FR) vs −13.6% ± 3.5% (AFR); and RV: −15.1% ± 3.6% (low FR) vs −12.6% ± 3.7% (AFR), both P < 0.001). Conclusions: Fetal LV and RV LPSS values derived with high AFR were significantly lower than corresponding LPSS values analyzed with low FR of 60 fps. Future studies are needed to clarify the clinical importance of this relationship. K E Y W O R D S fetal echocardiography, myocardial strain, wall motion How to cite this article: Enzensberger C, Rostock L, Graupner O, et al. Wall motion tracking in fetal echocardiography-Application of low and high frame rates for strain analysis.

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supporting

confidence: 48%

mentioning

confidence: 69%