Navegando por Palavras-chave "three-dimensional ultrasonography"
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- ItemSomente MetadadadosFetal lung volume in fetuses with urinary tract malformations: Comparison by 2D-, 3D-sonography and magnetic resonance imaging(Taylor & Francis Ltd, 2010-01-01) Araujo Junior, Edward [UNIFESP]; De Oliveira, Patricia Soares [UNIFESP]; Machado Nardozza, Luciano Marcondes [UNIFESP]; Simioni, Christiane [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Goldman, Susan Menasce [UNIFESP]; Szejnfeld, Jacob [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Objective. To evaluate the concordance between two-dimensional ultrasonography (2DUS), three-dimensional ultrasonography (3DUS) and magnetic resonance imaging (MRI) in the assessment of lung volume in fetuses with urinary tract malformations (UTM).Methods. This was a cross-sectional study involving 12 pregnancies between 19 and 34 weeks, with various fetal UTM. Pulmonary volume was obtained by 2DUS using the following equation: total lung volume = [right lung antero-posterior diameter (X) x transverse diameter (Y) x cranial-caudal diameter x 0.152 + left lung (X1) x (Y1) x (Z1) x 0. 167]. Pulmonary volume by 3DUS was obtained using the virtual organ computer-aided analysis (VOCAL) method with a 30 degrees (VOL30), 18 degrees (VOL18) and 12 degrees (VOL12) rotation. A fast sequence of transverse lung section was also obtained by MRI. the intraclass correlation coefficient was used to evaluate the correlation between the three methods. the paired student t-test was used to compare the means.Results. There was a strong correlation between the three methods, and the highest correlations were between MRI and VOL18 for the right (ICC = 0.913) and left (ICC = 0.947) lungs. A strong correlation was also found between the lung volumes obtained through MRI and VOL12 as well as VOL18 (p = 0.544 and 0.286, respectively). However, for the left lung there was only a correlation between MRI and VOL12 (p = 0.49).Conclusions. There is a good concordance between 3DUS (VOL12) and MRI in the evaluation of lung volume in fetuses with UTM.
- ItemSomente MetadadadosNew anatomical landmarks to study the relationship between fetal lung area and thoracic circumference by three-dimensional ultrasonography(Informa Healthcare, 2012-10-01) Werneck Britto, Ingrid Schwach; Tedesco, Giselle Darahem; Silva Herbst, Sandra Rejane; Silva Bussamra, Luiz Claudio [UNIFESP]; Andrade, Fernando Moreira de; Araujo Junior, Edward [UNIFESP]; Machado Nardozza, Luciano Marcondes; Ruano, Rodrigo; Moron, Antonio Fernandes [UNIFESP]; Aoki, Tsutomu; Med Sci Coll Santa Casa São Paulo FCMSCSP; Universidade Federal de São Paulo (UNIFESP); Baylor Coll MedObjective: To evaluate the relation between total lung area (TLA) and thoracic circumference (TC) ratio by three-dimensional (3D) ultrasonography applying new anatomical landmarks as the fetal aorta and inferior angle of the scapula. Methods: A longitudinal prospective study was conducted with 56 uncomplicated pregnancies between 24 and 32 weeks of gestation. Polynomial regressions were used to evaluate the correlation between TC and gestational age (GA) as well as TC and estimated fetal weight (EFW). A simple linear regression was used to evaluate the correlation between TLA and Total thoracic area (TTA) and GA. the intraclass correlation coefficient (ICC) was used to assess the intra and interobserver variability. Results: 127 examinations were performed. TC values ranged from 150 to 174 mm (mean 166 mm) at 24 weeks and 215-248 mm (mean 231 mm) at 32 weeks. the TLA/TC ratio ranged from a mean of 0.64 at 24 weeks (range 0.56-0.70) to 0.90 at 32 weeks gestation (range 0.79-1.01). the intraobserver variability using the ICC was of 0.919 for TC; 0.916 for TTA; 0.860 for right lung area (RLA) and 0.910 for left lung area (LLA). Interobserver reproducibility was with an ICC of 0.970 for TC; 0.984 for RLA and 0.910 for LLA. Conclusions: Measurement of fetal TC and the relationship between TLA and TC by 3D-ultrasonography applying new anatomical landmarks shows good reproducibility and allows a new assessment of thoracic and lung growth.
- ItemSomente MetadadadosNomogram of fetal upper arm volume by three-dimensional ultrasound using extended imaging virtual organ computer-aided analysis (XI VOCAL)(Walter de Gruyter & Co, 2011-11-01) Cavalcante, Rafael Oliveira [UNIFESP]; Araujo Junior, Edward [UNIFESP]; Machado Nardozza, Luciano Marcondes [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Aim: To define the reference range of the fetal upper arm volume by three-dimensional (3D) ultrasound using the eXtended Imaging Virtual Organ Computer-aided AnaLysis (XI VOCAL) method.Methods: This prospective, cross-sectional study enrolled 425 healthy pregnant women with 20-40 weeks of gestation. the XI VOCAL technique was used for the volumetric calculations, considering 10 sequential sectional plane areas, performed along the axial plan of the fetal upper arm. the proximal and distal epiphyses were the beginning and final reference. Second degree polynomial regression models were created to evaluate the correlation between the volume of the fetal arm and the gestational age (GA), determining the 5(th), 10(th), 25(th), 50(th), 75(th), 90(th) and 95(th) corresponding percentiles. the intraclass correlation coefficient (ICC) was used to evaluate the intra-and interobserver reproducibility.Results: the mean fetal upper arm volume ranged from 4.59 +/- 1.18 (3.10-7.40 cm(3)) to 53.87 +/- 10.72 cm(3) (40.30-76.60 cm(3)). the fetal upper arm volume and GA were highly associated (R(2)=0.913). the intra-and interobserver reproducibility were reliable, with ICC=0.997 (95% CI 0.995-0.999) and 0.996 (95% CI 0.993-0.998), respectively.Conclusion: the reference range for the fetal upper arm volume was determined by 3D-ultrasound using the XI VOCAL method, and was found to be highly reproducible.
- ItemSomente MetadadadosPrediction of birth weight using fetal thigh and upper-arm volumes by three-dimensional ultrasonography in a Brazilian population(Informa Healthcare, 2010-05-01) Machado Nardozza, Luciano Marcondes [UNIFESP]; Vieira, Márcio Fragoso [UNIFESP]; Araujo Junior, Edward [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Methods. A cross-sectional study involving 81 live singletons was performed. VolArm and VolTh were obtained using 3DUS multiplanar mode with 5 mm slices. Linear and polynomial regressions were calculated to determine the best formula to predict BW using VolArm and VolTh. Analysis of variance was used to compare errors in BW using these formulae and using Shepard's and Hadlock's formulae. the interclass correlation coefficient (ICC) was used to assess intra and interobserver variability of measurements.Results. the best formula to predict BW based on VolArm was a simple linear equation (BW = 803.91 + 39.89VolArm), and for VolTh it was a second degree polynomial equation (BW = 32.37VolTh - 0.06VolTh
- ItemSomente MetadadadosReference Range of Embryo Volume by 3-D Sonography Using the XI VOCAL Method at 7 to 10+6 Weeks of Pregnancy(Thieme Medical Publ Inc, 2010-06-01) Araujo Junior, Edward [UNIFESP]; Machado Nardozza, Luciano Marcondes [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Nowak, Paulo Martin [UNIFESP]; Bortoletti Filho, Joao [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)We sought to establish normative data for three-dimensional ultrasound (3DUS) first-trimester embryonic volume using the extended imaging virtual organ computer-aided analysis (XI VOCAL) technique. This cross-sectional study involved 64 normal pregnancies at 7 to 10 + 6 weeks' gestation. Embryonic volume was obtained on 3DUS using the XI VOCAL technique with manual outline of 10 sequential planes. the mean, median, standard deviation, and maximum and minimum values were obtained for each week calculated. Polynomial regression models adjusted by the determination coefficient (R(2)) were created to assess the correlation between embryonic volume and gestational age (GA) and crown rump length (CRL). the intraclass correlation coefficient (ICC) was used to calculate inter-and intraobserver reproducibility. Mean embryonic volume went from 0.20 cm(3) (range 0.10 to 0.89 cm(3)) to 5.12 cm(3) (range 2.90 to 5.98 cm(3)). Embryonic volume was strongly correlated with GA (R(2) = 0.84) and with CRL (R(2) = 0.87). There was a good inter-and intraobserver reproducibility of embryonic volume with ICC = 0.999 and 0.995, respectively. Reference range for 3DUS first-trimester embryonic volume using the XI VOCAL technique were generated for pregnancies at 7 to 10 + 6 weeks, with high inter-and intraobserver reproducibility.
- ItemSomente MetadadadosReference range of fetal lung volume by 3D-ultrasonography using the rotational method (VOCAL)(Walter de Gruyter & Co, 2009-03-01) Werneck Britto, Ingrid Schwach; Silva Bussamra, Luiz Claudio de; Junior, Edward Araujo [UNIFESP]; Tedesco, Giselle Daharem; Machado Nardozza, Luciano Marcondes [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Aoki, Tsutomu; Med Sci Coll Santa Casa São Paulo FCMSCSP; Universidade Federal de São Paulo (UNIFESP)Aim: To determine reference ranges for fetal lung volume by 3-dimensional ultrasonography using the VOCAL (Virtual Organ Computed-aided Analysis) method.Methods: A longitudinal prospective study was conducted with 61 uncomplicated pregnancies between 24 and 32 weeks of gestation. A separate measurement of both lungs volume was conducted by VOCAL with 308 rotation angle. for each gestational age, an average, standard deviation and maximal and minimal values were established in addition to the percentiles 5, 10, 25, 50, 75 and 90 for right and left lung volume. To evaluate the correlation between lung volume and gestational age, and estimated fetal weight, a polynomial regression with determination coefficient adjustment (R(2)) was used. the intra-observer reproducibility was evaluated by the intra-class correlation coefficient (ICC), whereas the inter-observer reproducibility was evaluated by Cronbach alpha statistic test.Results: the average right lung volume varied from 12.5 +/- 0.7 cm(3) at the 24(th) week to 31.8 cm(3)+/- 1.8 cm(3) at the 32(nd) week. the average left lung volume varied from 9.2 +/- 0.9 cm(3) at the 24(th) week to 22.0 cm(3)+/- 1.6 cm(3) at the 32(nd) week. We observed a strong correlation between right lung volume and gestational age (R(2)=0.975) and estimated fetal weight (R(2)=0.905), as well as between the left lung volume with gestational age (R(2)=0.970) and estimated fetal weight (R(2)=0.908). We observed a good intra-observer reproducibility for the right lung volume (ICC=0.990) and for the left lung volume (ICC=0.986). Similarly, we observed good inter-observer reproducibility for right lung volume (0.975) and left lung volume (0.962).Conclusion: Reference range of fetal lung volume by 3D-ultrasonography using the VOCAL method was determined.