Navegando por Palavras-chave "volume contrast imaging"

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    Delineation of vertebral area on the coronal plane using three-dimensional ultrasonography advanced volume contrast imaging (VCI) Omni view: intrarater reliability and agreement using standard mouse, high definition mouse, and pen-tablet
    (Informa Healthcare, 2012-09-01) Araujo Junior, Edward [UNIFESP]; Martinez, Luis Henrique [UNIFESP]; Simioni, Christiane [UNIFESP]; Martins, Wellington P.; Nardozza, Luciano M. [UNIFESP]; Moron, Antonio F. [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Universidade de São Paulo (USP); Escola Ultra Sonog & Reciclagem Med Ribeirao Pret; Inst Nacl Ciencia & Tecnol INCT Hormonios & Saude
    Objective: To assess the fetal lumbosacral spine by three-dimensional (3D) ultrasonography using volume contrast imaging (VCI) omni view method and compare reproducibility and agreement between three different measurement techniques: standard mouse, high definition mouse and pen-tablet. Methods: A comparative and prospective study with 40 pregnant women between 20 and 34+6 weeks was realized. 3D volume datasets of the fetal spine were acquired using a convex transabdominal transducer. Starting scan plane was the coronal section of fetal lumbosacral spine by VCI-C function. Omni view manual trace was selected and a parallel plane of fetal spine was drawn including interest region. Intraclass correlation coefficient (ICC) was used for reproducibility analysis. the relative difference between three used techniques was compared by chi-square test and Fischer test. Results: Pen-tablet showed better reliability (ICC = 0.987). in the relative proportion of differences, this was significantly higher for the pen-tablet (82.14%; p < 0.01). in paired comparison, the relative difference was significantly greater for the pen-tablet (p < 0.01). Conclusion: the pen-tablet showed to be the most reproductive and concordant method in the measurement of body vertebral area of fetal lumbosacral spine by 3D ultrasonography using the VCI.
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    Reference Ranges for Vertebral Body Areas of the Fetal Lumbosacral Spine on 3-Dimensional Sonography Using Volume Contrast Imaging With OmniView
    (Amer Inst Ultrasound Medicine, 2012-11-01) Martinez, Luis Henrique [UNIFESP]; Araujo Junior, Edward [UNIFESP]; Simioni, Christiane [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Baylor Coll Med
    Objectives-The purpose of this study was to establish reference ranges for vertebral body areas of the fetal lumbosacral spine in the coronal plane on 3-dimensional sonography using volume contrast imaging with OmniView (GE Healthcare, Zipf, Austria).Methods-An observational cross-sectional study was conducted on 576 healthy pregnant women at gestational ages of 20 weeks to 34 weeks 6 days. Volume contrast imaging with OmniView was used to measure the vertebral body areas (L1 L5, S1, and S2) by positioning a curved line along the fetal lumbosacral spine. To create reference ranges, first- and second-degree linear regression models adjusted using residual analysis and the coefficient of determination (R-2) were created. To assess reproducibility, two examiners evaluated 40 random volumes using the intraclass correlation coefficient.Results-The mean areas of the vertebral bodies were 102.72 (range, 25-254), 107.29 (range, 30-245), 105.10 (range, 31-231), 99.09 (range, 31-211), 87.74 (range, 11-178), 65.80 (range, 18-161), and 46.54 (range, 12-129) mm(2) for L1, L2, L3, L4, L5, S1, and S2, respectively. In the intraobserver and interobserver reproducibility assessments, intraclass correlation coefficients of greater than 0.80 were found for all fetal vertebral body areas.Conclusions-Reference values for fetal lumbosacral spine vertebral body areas were determined by 3-dimensional sonography using volume contrast imaging with OmniView, and they were shown to be reproducible.