Repositório Institucional - Unifesp :: Navegando por Palavras-chave "Three-dimensional ultrasound"

Navegando por Palavras-chave "Three-dimensional ultrasound"

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Acesso aberto (Open Access)
Aplicações da ultra-sonografia tridimensional na avaliação do cerebelo fetal
(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2007-06-01) Araujo Júnior, Edward [UNIFESP]; Guimarães Filho, Hélio Antonio [UNIFESP]; Pires, Claudio Rodrigues [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
For the last years three-dimensional ultrasonography has become an imaging diagnosis method of great importance in obstetrics. One of its advantages would be the higher sensitivity compared with two-dimensional ultrasound in the diagnosis of some fetal malformations. The potential applications of this new method would be an improved accuracy in the measurement of fetal organs, the possibility of reviewing volumes in the absence of the patient, and using different planes to assess specific anatomical structures, as well as the capacity to transfer data files to remote reference centers. Ultrasonographic evaluation of fetal cerebellum is particularly important, since developmental alterations are correlated with the fetal growth alterations and congenital anomalies. The objective of this updating is to demonstrate the VOCAL and 3D XI methods in the evaluation of the fetal cerebellum, their potential benefits, and the latest information in the literature about this subject.
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Assessment of cerebral circulation in normal fetuses by three-dimensional power Doppler ultrasonography
(Elsevier B.V., 2012-03-01) Figuinha Milani, Herbene Jose [UNIFESP]; Sa Barreto, Enoch Quindere de [UNIFESP]; Araujo Junior, Edward [UNIFESP]; Haratz, Karina Krajden [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Machado Nardozza, Luciano Marcondes [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
Objective: To assess the three-dimensional power Doppler ultrasonography (3D power Doppler) vascular indices in the middle cerebral artery (MCA), anterior cerebral artery (ACA) and posterior cerebral artery (PCA) territories. Methods: A cross-sectional study was carried out on 111 normal pregnancies between 26 and 34 weeks. the MCA, ACA and PCA territories closest to the transducer were scanned and volumes were calculated by using the VOCAL (Virtual Organ Computer-aided Analysis) program. the 3D power Doppler indices - vascularization index (VI), flow index (FI) and vascularization-flow index (VFI) were calculated. Scatter graphs, Pearson correlation coefficients (r) and linear regression models were used. Results: Only the FI-MCA (r = 0.38 and p < 0.001), VFI-MCA (r = 0.23 and p = 0.016) and FI-PCA (r = 0.191 and p = 0.040) had a low correlation with gestational age. the other 3D power Doppler indices VI-MCA (r = 0.153 and p = 0.150), VI-ACA (r = 0.105 and p = 0.271), FI-ACA (r = 0.154 and p = 0.106), VFI-ACA (r = 0.134 and p = 0.161), VI-PCA (r = 0.105 and p = 0.270) and VFI-PCA (r = 0.126 and p = 0.180) showed no statistically significant correlation with gestational. Conclusion: It was observed a low correlation between gestational age and the FI-MCA, VFI-MCA and FI-PCA. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
Acesso aberto (Open Access)
Assessment of renal volume by three-dimensional ultrasonography in pregnant bitches: an experimental study using virtual organ computer-aided analysis
(Biomed Central Ltd, 2012-07-02) Mendonca, Debora Sartori [UNIFESP]; Moron, Rafael Fontoura Fernandes [UNIFESP]; Maldonado, Andre Luiz Louzada [UNIFESP]; Araujo Junior, Edward [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
Background: To assess and to compare the renal volume evolution in bitches during pregnancy by two-dimensional (2D) ultrasonography using the ellipsoid technique (volume = length x width x depth x 0.523) and three-dimensional (3D) ultrasonography using the Virtual Organ Computer-aided AnaLysis (VOCAL) method. A longitudinal prospective study was performed with 17 normal Golden Retrievers bitches during pregnancy from heat to the last third of gestation. the ultrasound scans were performed by two veterinarians. the left and right kidneys were assessed in three moments (day 0 = non-pregnant bitches; days 1st to 20th of pregnancy and days 21st to 40th of pregnancy) by three techniques (ellipsoid; VOCAL 12 degrees and VOCAL 30 degrees). for reproducibility calculations, we used the intraclass correlation coefficient (ICC).Results: the inferential result of the volumes in ANOVA revealed the interaction effect between side and moment (p = 0.009). the 3D techniques showed, in average, the same renal volumes (p = 0.137) regardless of the side and moment. Considering the right side, the renal volume in the day 0 was smaller than the day 21st to 40th (p = 0.029). Considering the left side, the renal volume at day 0 was smaller than the day 1st to 20th (p = 0.020) and day 21st to 40th (p = 0.007). It was found good intra observer reproducibility (ICC > 0.9) and none of the three techniques showed a good inter observer reproducibility (ICC < 0.7).Conclusion: the renal volume bitches by 3D ultrasonography using the VOCAL method (12 degrees and 30 degrees) had good correlation with the volume obtained by 2D ultrasonography method.
Acesso aberto (Open Access)
Avaliação da geometria do coração fetal por meio da ultrassonografia tridimensional pelo método STIC renderização
(Universidade Federal de São Paulo (UNIFESP), 2017-12-18) Bezerra, Marilim de Souza [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; http://lattes.cnpq.br/7732742031806411; http://lattes.cnpq.br/5327493355945437; Universidade Federal de São Paulo (UNIFESP)
Objetivos: Determinar a geometria do coração fetal ao longo da gestação segundo a medida dos seus ângulos internos por meio da ultrassonografia tridimensional (3D) pelo método spatio-temporal image correlation (STIC) renderização e avaliar as reprodutibilidades intra e interobservador dos ângulos cardíacos fetais. Métodos: Realizou-se um estudo prospectivo transversal com 250 gestações únicas normais entre 20 e 33 semanas e 6 dias. A partir do plano de quatro câmaras cardíacas, determinou-se varredura pelo STIC e pelo modo renderização foram avaliadas as medidas de oito ângulos do coração fetal, sendo eles: ângulo ápice (ÂA), ângulo base (ÂB), ângulo valva mitral (ÂVM), ângulo valva tricúspide (ÂVT), ângulo ventrículo esquerdo (ÂVE), ângulo ventrículo direito (ÂVD), ângulo átrio esquerdo (ÂAE) e ângulo átrio direito (ÂAD). Para os ângulos foram criados gráficos de dispersão em função da idade gestacional, com ajustes pelo coeficiente de determinação (R²). Para os testes de reprodutibilidade intra e interobservador, utilizou-se o coeficiente de correlação de concordância (CCC). Resultados: A média ± desvio-padrão da idade materna (anos) e a idade gestacional (semanas) foram 31,7 ± 4,9 e 26,3 ± 4,2, respectivamente. Observou-se pouca variação de todos os ângulos do coração fetal pelo STIC renderização com a idade gestacional com R² = 0,01 para ângulo ápice, R² < 0,01 para ângulo base, R² = 0,01 para ângulo valva mitral, R² < 0,01 para ângulo valva tricúspide, R² < 0,01 para ângulo ventrículo esquerdo, R² < 0,01 para ângulo ventrículo direito, R² < 0,01 para ângulo átrio esquerdo, e R² < 0,01 para átrio direito, respectivamente. Observou-se moderada/boa concordância intra e interobservador para a medida dos ângulos internos do coração fetal pelo STIC rendering, com CCC entre 0,74 e 0,93. Conclusão: O coração fetal não apresentou variação significativa de sua geometria ao longo da gestação por meio da ultrassonografia 3D pelo método STIC renderização, com moderada/boa reprodutibilidade intra e interobservador de suas medidas.
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Development of fetal brain sulci and gyri: assessment through two and three-dimensional ultrasound and magnetic resonance imaging
(Springer, 2011-02-01) Rolo, Liliam Cristine [UNIFESP]; Araujo, Edward [UNIFESP]; Machado Nardozza, Luciano Marcondes [UNIFESP]; Oliveira, Patricia Soares de [UNIFESP]; Ajzen, Sergio Aron [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
Cerebral malformations may lead to permanent postnatal sequels. the antenatal detection of anomalous or absent fetal sulci and gyri may indicate abnormal brain development and future neurological and psychomotor problems in that infant. the prenatal diagnosis of these conditions allows genetic counseling, psychological support of the parents and optimization of obstetric management. Diagnosis is usually based on two-dimensional obstetric ultrasound (2DUS) and eventually fetal magnetic resonance imaging (MRI), to confirm findings. Fetal three-dimensional ultrasound (3DUS) using the rendering mode has been recently introduced but has not yet been extensively tested in clinical practice.This study reviewed and compared three imaging modalities, 2DUS, 3DUS, and MRI, in the analysis of the development of the main sulci and gyri of central nervous system of normal fetuses between 20 and 32 weeks' gestation.
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Fetal cardiac function assessed by spatio-temporal image correlation
(Springer, 2011-07-01) Simioni, Christiane [UNIFESP]; Machado Nardozza, Luciano Marcondes [UNIFESP]; Araujo Junior, Edward [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Terasaka, Ohanna Ana [UNIFESP]; Zamith, Marina Maccagnano [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
Three-dimensional (3D) and four-dimensional (4D) ultrasound have been proposed to be valuable tools for the examination of fetal heart. Spatio-temporal image correlation (STIC) is a technique that adds a time component to 3D ultrasound imaging of the fetal heart, so we can evaluate cardiac structures as a 4D cine sequence containing information of one full cardiac cycle. STIC gives the investigator the opportunity to freeze the displayed cardiac loop in end-diastolic and end-systolic phases. By STIC, 3D measurements of both the left and right ventricle can be used to calculate fetal heart stroke volume, cardiac output and ejection fraction, and expressions of cardiac function. the ultimate goal of STIC technique is to improve fetal cardiac function analysis by decreasing the dependency on operator skills required by two-dimensional ultrasound.In this article, we describe literature practical approach for the examination of the fetal heart function using 4D ultrasound by STIC technique.
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Fetal lung volume: comparison by 2D-and 3D-sonography in normal fetuses
(Springer, 2009-09-01) Werneck Britto, Ingrid Schwach; Silva Bussamra, Luiz Claudio de; Araujo Junior, Edward [UNIFESP]; Tedesco, Giselle Darahem; Machado Nardozza, Luciano Marcondes [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Aoki, Tsutomu; Universidade Federal de São Paulo (UNIFESP); Med Sci Coll Santa Casa São Paulo
To compare two-dimensional ultrasonography (2D US) and three-dimensional ultrasonography (3D US) in the assessment of normal fetal lung volume.A cross-sectional study was performed involving 50 normal pregnancies at 24-32 weeks' gestation. the following equations were used for lung volume calculation by 2D US: Eq(2D1) = 4.24 + {1.53 x [(area of base of both lungs) x 1/3 (height of right lung)]} and Eq(2D2) = [anteroposterior diameter (X) x transverse diameter (Y) x cranial-caudal diameter (Z) of the right lung x 0.152 + (X') x (Y') x (Z') of the left lung x 0.167]. for 3D US, the virtual organ computer-aided analysis (VOCAL) method was used with a 30A degrees rotation angle and the total lung volume (V3D) was obtained by summing the volumes of each lung. Regression models (R (2)) were devised to assess lung volume evolution over the course of the pregnancy. Pearson's correlation coefficient (r) was used to assess correlation among the techniques, while Friedman's test was used for means comparisons.Strong correlation was observed among the three techniques [V3D vs. Eq(2D2) r = 0.856; V3D vs. Eq(2D1) r = 0.838 and Eq(2D2) vs. Eq(2D1) r = 0.964; all with P < 0.001]. Mean lung volumes were 37.05 +/- A 9.67, 29.79 +/- A 8.79 and 12.67 +/- A 4.12 ml for V3D, Eq(2D1) and Eq(2D2), respectively (P < 0.001).Strong correlation and significant difference was observed among the three techniques of fetal lung volume assessment in normal fetuses.
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Fetal Myocardial Wall Area: Constructing a Reference Range by Means of Spatiotemporal Image Correlation in the Rendering Mode
(Karger, 2015-01-01) Bello Barros, Fernanda Silveira [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Rocha, Luciane Alves [UNIFESP]; Martins, Wellington P. [UNIFESP]; Tonni, Gabriele; Machado Nardozza, Luciano Marcondes [UNIFESP]; Araujo Junior, Edward [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Guastalla Civil Hosp
Objective: To establish the reference range of the myocardial wall area in the fetus using three-dimensional ultrasound in the rendering mode. Methods: A prospective, cross-sectional study including 371 singleton, uncomplicated pregnancies at 20 weeks 0 day to 33 weeks 6 days of gestation was carried out. Cardiac volumes were obtained using spatiotemporal image correlation (STIC) at the level of the four-chamber view. the end-diastolic myocardial area of the both ventricles was measured manually. the intraclass correlation coefficient (ICC) was used to assess intra- and interobserver concordance. Results: the mean myocardial area of the fetal right ventricular (RV) wall ranged from 0.86 +/- 0.23 cm(2) at 20 weeks 0 day to 2.75 +/- 0.69 cm(2) at 33 weeks 6 days of gestation. the mean myocardial area of the fetal left ventricular (LV) wall ranged from 0.82 +/- 0.20 cm(2) at 20 weeks 0 day to 2.49 +/- 0.59 cm(2) at 33 weeks 6 days of gestation. in addition, intra- and interobserver concordance for the myocardial area of the RV and LV walls was good, with ICC values of 0.94, 0.95, 0.85, and 0.93, respectively. Conclusions: the reference range for the myocardial area of the RV and LV walls was determined by cardio-STIC in the rendering mode at 20 weeks 0 day to 33 weeks 6 days of gestation, with good concordance between values. (C) 2014 S. Karger AG, Basel.
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Prenatal diagnosis of congenital syngnathia by 3D ultrasound and pathological correlation
(Springer, 2013-01-01) Rezende, Guilherme de Castro; Pereira, Alamanda Kfoury; Nogueira Reis, Zilma Silveira; Parola, Aluana Rezende; Bastos, Fernando Macedo; Araujo Junior, Edward [UNIFESP]; Machado Nardozza, Luciano Marcondes [UNIFESP]; Vieira Cabral, Antonio Carlos; Universidade Federal de Minas Gerais (UFMG); Minist Educ Brazil; Universidade Federal de São Paulo (UNIFESP)
Congenital syngnathia is a maxillomandibular fusion, and it can vary in severity from single mucosal bands (synechiae) to complete bony fusion (synostosis). Cases of combinations of bony or soft tissue adhesions between the mandible and maxilla with cleft of the lip or palate, aglossia, popliteal pterygium, and van der Woude syndrome have been reported. It is a very rare condition, with only one case report of prenatal diagnosis using two-dimensional ultrasound in the literature. We present the first case of prenatal diagnosis of congenital syngnathia by three-dimensional ultrasound and the postnatal pathology correlation.
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Prenatal diagnosis of intracranial immature teratoma in the third trimester using 2D and 3D sonography
(Springer, 2013-01-01) Moreira Rios, Livia Teresa; Araujo Junior, Edward [UNIFESP]; Nacaratto, Daniela Cristina [UNIFESP]; Machado Nardozza, Luciano Marcondes [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Martins, Marilia da Gloria; Fed Univ Maranhao UFMA; Universidade Federal de São Paulo (UNIFESP)
Intracranial tumors are uncommon and represent 0.5-1.5 % of all pediatric tumors. Teratoma is the most frequent intracranial tumor found at birth. Large teratomas are extremely rare and have a guarded prognosis since they grow fast and cause brain tissue destruction. A 31-week primigravida was referred to our hospital for investigation of an intracranial mass seen in the fetus. Two-dimensional ultrasound showed a large heterogeneous solid mass with calcifications inside, measuring 5.3 x 4.8 cm. It was in the right cerebral hemisphere at the level of the middle and posterior fossa, thereby shifting the midline and causing severe ventriculomegaly that measured 3.5 cm at the level of the lateral ventricle. Three-dimensional ultrasound (3DUS) in multiplanar mode allowed us to assess the anatomical relationships between the mass and the midline structures. the neurosurgical team, who had suspected that the case was inoperable, was thus able to gain a better understanding of the case. Transfontanellar ultrasound was performed on the day after the birth and confirmed the previous findings. Moreover, a biopsy confirmed the histology of the mass: it was an immature teratoma. the infant died on the 24th day of life after a large expansion of head circumference. Intracranial teratomas are extremely severe because of their quick growth and mass effect, often leading to neonatal death within days. 3DUS is a new prenatal diagnostic method that makes it possible to assess the anatomical relationships between the mass and the intracranial structures, thus enabling better preoperative planning.
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Reference Range for Fetal Interventricular Septum Area by Means of Four-Dimensional Ultrasonography Using Spatiotemporal Image Correlation
(Karger, 2013-01-01) Machado Nardozza, Luciano Marcondes [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Araujo Junior, Edward [UNIFESP]; Hatanaka, Alan Roberto [UNIFESP]; Rocha, Luciane Alves [UNIFESP]; Simioni, Christiane [UNIFESP]; Ruano, Rodrigo; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Baylor Coll Med
Objective: To determine reference range for fetal interventricular septum area by means of 3-dimensional ultrasonography (3DUS) using the spatiotemporal image correlation (STIC) method. Methods: A prospective, cross-sectional study was conducted on 328 normal pregnant women between the 18th and 33rd gestational weeks. To obtain the interventricular septum area, a virtual plane was used, with the green line (region of interest) adjacent to the external margin of the septum, which was manually delimited. To evaluate the correlation of the septum area with the gestational age, different regression modes were evaluated. the intraclass correlation coefficient was used to evaluate the interobserver reproducibility. Results: the interventricular septum area showed correlation with the gestational age (r = 0.81). the mean increased from 0.47 +/- 0.10 cm(2) in the 18th week to 2.42 +/- 1.13 cm(2) in the 33rd week of gestation. the mathematical equation that best represented this correlation was provided by linear regression: interventricular septum area = 0.0511 x gestational age (R-2 = 0.095). the interobserver reproducibility was good, with bias of 0.01 cm(2), precision of 0.07 cm(2) and absolute limits of agreement of -0.14 and +0.15 cm(2). Conclusions: Reference range for fetal interventricular septum area were determined by means of 3DUS using STIC in the rendering mode and were shown to be reproducible: Copyright (c) 2013 S. Karger AG, Basel
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Reproducibility of three-dimensional power Doppler placental vascular indices in pregnancies between 26 and 35 weeks
(Springer, 2011-02-01) Guimaraes Filho, Helio Antonio [UNIFESP]; Mattar, Rosiane [UNIFESP]; Araujo Junior, Edward [UNIFESP]; Dias da Costa, Lavoisier Linhares; Mello Junior, Carlos Fernando de; Machado Nardozza, Luciano Marcondes [UNIFESP]; Nowak, Paulo Martin [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); CETRIM Imaginol Training Ctr
Assess intra and interobserver reproducibility of three-dimensional power Doppler (3DPD) placental vascular indices in normal pregnancies between 26 and 35 weeks.Thirty 3D volumes were captured by one observer and stored for analysis. Vascularization index (VI), flow index (FI) and vascularization flow index (VFI) were calculated from the spherical placental tissue samples obtained through the automatic Virtual Organ Computer-aided AnaLysis (VOCAL). Two observers analyzed the stored volumes and calculated the indices and their findings were compared. Intraclass correlation coefficients (ICCs) were used to analyze intra and interobserver correlations. Data were analyzed using confidence intervals, reliability coefficients and Bland-Altman graphs with concordance limits.All three indices had good intra and interobserver reproducibility. Intraobserver ICCs for the three indices were > 0.90. the FI had the highest ICC (0.99), the highest interobserver ICC (0.98) and the best concordance on the Bland-Altman graphs.3DPD placental vascular indices obtained using the automatic sphere mode had a good intra and interobserver reproducibility for pregnancies between 26 and 35 weeks. the FI obtained the highest reproducibility scores.
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ROLE of 3-D ULTRASOUND in CLINICAL OBSTETRIC PRACTICE: EVOLUTION OVER 20 YEARS
(Elsevier B.V., 2015-05-01) Tonni, Gabriele [UNIFESP]; Martins, Wellington P.; Guimaraes Filho, Helio; Araujo Junior, Edward [UNIFESP]; Guastalla Civil Hosp; Universidade Federal de São Paulo (UNIFESP); Universidade de São Paulo (USP); CETRIM Ctr Imaginol Training
The use of 3-D ultrasound in obstetrics has undergone dramatic development over the past 20 years. Since the first publications on this application in clinical practice, several 3-D ultrasound techniques and rendering modes have been proposed and applied to the study of fetal brain, face and cardiac anatomy. in addition, 3-D ultrasound has improved calculations of the volume of fetal organs and limbs and estimations of fetal birth weight. and furthermore, angiographic patterns of fetal organs and the placenta have been assessed using 3-D power Doppler ultrasound quantification. in this review, we aim to summarize current evidence on the clinical relevance of these methodologies and their application in obstetric practice. (C) 2015 World Federation for Ultrasound in Medicine & Biology.
Acesso aberto (Open Access)
Ultra-som tridimensional na avaliação do volume de membros fetais
(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2007-10-01) Araujo Júnior, Edward [UNIFESP]; Vieira, Márcio Fragoso [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Guimarães Filho, Hélio Antonio [UNIFESP]; Pires, Claudio Rodrigues [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
The fetal limb volume reflects the nutritional status and intra-uterine growth of the fetus. The arrival of the three-dimensional ultrasound has allowed a more accurate volumetric evaluation of irregularly shaped structures such as fetal organs. The three-dimensional multiplanar mode is the most efficient technique to evaluate fetal limb volume as a parameter for a more accurate birth weight prediction. Currently, this method is useful for monitoring the development of soft tissue and for early detection of fetal growth deviations. In our country, where fetal growth restriction is frequent, with poor access to a skilled neonatal assistance, the dissemination of this technique could definitely contribute to reduce the rates of perinatal morbidity and mortality.

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