Repositório Institucional - Unifesp :: Navegando por Palavras-chave "Imagem tridimensional"

Navegando por Palavras-chave "Imagem tridimensional"

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Acesso aberto (Open Access)
Assessment of pelvic floor by three-dimensional-ultrasound in primiparous women according to delivery mode: initial experience from a single reference service in Brazil
(Federação Brasileira das Sociedades de Ginecologia e Obstetrícia, 2013-03-01) Araujo Júnior, Edward [UNIFESP]; Freitas, Rogério Caixeta Moraes De [UNIFESP]; Di Bella, Zsuzsanna Ilona Katalin De Jármy [UNIFESP]; Alexandre, Sandra Maria [UNIFESP]; Nakamura, Mary Uchiyama [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
PURPOSE: To evaluate changes to the pelvic floor of primiparous women with different delivery modes, using three-dimensional ultrasound. METHODS: A prospective cross-sectional study on 35 primiparae divided into groups according to the delivery mode: elective cesarean delivery (n=10), vaginal delivery (n=16), and forceps delivery (n=9). Three-dimensional ultrasound on the pelvic floor was performed on the second postpartum day with the patient in a resting position. A convex volumetric transducer (RAB4-8L) was used, in contact with the large labia, with the patient in the gynecological position. Biometric measurements of the urogenital hiatus were taken in the axial plane on images in the rendering mode, in order to assess the area, anteroposterior and transverse diameters, average thickness, and avulsion of the levator ani muscle. Differences between groups were evaluated by determining the mean differences and their respective 95% confidence intervals. The proportions of levator ani muscle avulsion were compared between elective cesarean section and vaginal birth using Fisher's exact test. RESULTS: The mean areas of the urogenital hiatus in the cases of vaginal and forceps deliveries were 17.0 and 20.1 cm², respectively, versus 12.4 cm² in the Control Group (elective cesarean). Avulsion of the levator ani muscle was observed in women who underwent vaginal delivery (3/25), however there was no statistically significant difference between cesarean section and vaginal delivery groups (p=0.5). CONCLUSION: Transperineal three-dimensional ultrasound was useful for assessing the pelvic floor of primiparous women, by allowing pelvic morphological changes to be differentiated according to the delivery mode.
Acesso aberto (Open Access)
Avaliação da evolução da área das valvas mitral e tricúspide fetal com ultrassonografia tridimensional
(Federação Brasileira das Sociedades de Ginecologia e Obstetrícia, 2010-09-01) Rolo, Liliam Cristine [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Simioni, Christiane [UNIFESP]; Zamith, Marina Maccagnano [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
PURPOSE: to evaluate the areas of the atrioventricular valves (tricuspid and mitral) of normal fetuses by the use of three-dimensional ultrasound (3DUS) and the spatiotemporal image correlation (STIC) method. METHODS: a cross-sectional study was conducted on 141 women between the 18th and the 33rd week of pregnancy. Cardiac volumes were measured with a volumetric transabdominal transducer attached to the Voluson 730 Expert equipment. The four chamber plane was used as reference, with the region of interest (ROI) positioned from the ventricles, and the area of the valves was obtained manually. To determine the correlation of the areas with gestational age, scatter plots were constructed and the Pearson correlation coefficient (r) was calculated. Means, medians, standard deviations (SD) and maximum and minimum values were calculated. The simple linear regression model was used to determine reference ranges of valve areas according to the gestational age by the Altman method, with the level of significance set at p<0.05. To calculate the intraobserver reproducibility, we used the intraclass correlation coefficient (ICC) and the Bland-Altman graph. RESULTS: the mitral and tricuspid valve areas were correlated to the gestational age (r=0.80 for the tricuspid and r=0.79 for the mitral valve) and the mean value of the tricuspid and mitral valves increased from 0.22±0.10 cm² and 0.23±0.10 cm² on the 18th week to 0.92±0.29 cm² and 1.08±0.41 cm² on the 33rd of pregnancy, respectively. The intraobserver reproducibility resulted in an ICC=0.993 (95%CI 0.987; 0.996) and the mean difference was 0.01 cm² (SD±0.2 cm² and CI95%±0.4 cm²). CONCLUSION: reference intervals for the areas of the mitral and tricuspid valve between the 18th and the 33rd week of gestation were determined and proved to be highly reproducible.
Somente Metadadados
Avaliação de um programa para computador pessoal na produção de imagens tridimensionais anatômicas do fígado de suíno
(Universidade Federal de São Paulo (UNIFESP), 2004) Zanchet, Dinamar José [UNIFESP]; Montero, Edna Frasson de Souza [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
Acesso aberto (Open Access)
Avaliação do comprimento e área do corpo caloso fetal por meio da ultrassonografia tridimensional
(Federação Brasileira das Sociedades de Ginecologia e Obstetrícia, 2010-12-01) Visentainer, Milena [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
PURPOSE: to establish reference values for the length and area of the fetal corpus callosum between the 20th and 33rd weeks of gestation using three-dimensional ultrasound (3DUS). METHODS: this cross-sectional study involved 70 normal pregnancies with gestational age between 20 and 33 weeks. An Accuvix XQ instrument with a convex volumetric transducer (3 to 5 MHz) was used. To assess the corpus callosum, a transfrontal plane was obtained using the metopic suture as an acoustic window. Length was obtained by measuring the distance between the proximal and distal extremities of the corpus callosum. Area was obtained by manual tracing of the external corpus callosum surface. The means, medians, standard deviations, and maximum and minimum values were calculated for the corpus callosum length and area. Scatter graphs were created to analyze the correlation between corpus callosum length and area and gestational age and biparietal diameter, the quality adjustments was verified according to the determination coefficient (R²). The intraclass correlation coefficient (ICC) was used to assess the intraobserver variability. RESULTS: mean corpus callosum length increased from 21.7 (18.6 - 25.2 mm) to 38.7 mm (32.6 - 43.3 mm) between 20 and 33 weeks of pregnancy, respectively. Mean corpus callosum area increased from 55.2 (41.0 - 80.0 mm²) to 142.2 mm² (114.0 - 160.0 mm²), between 20 to 33 weeks of pregnancy, respectively. There was a strong correlation between corpus callosum length and area and gestational age (R² = 0.7 and 0.7, respectively) and biparietal diameter (R² = 0.7 and 0.6, respectively). Intraobserver variability was appropriate, with an ICC of 0.9 and 0.9 for length and area, respectively. CONCLUSIONS: reference values for corpus callosum length and area were established for fetuses between 20 and 33 weeks gestation. Intraobserver variability was appropriate.
Acesso aberto (Open Access)
Avaliação do volume da placenta no primeiro trimestre de gestação por meio da ultrassonografia tridimensional utilizando o método XI VOCAL
(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2010-04-01) Nowak, Paulo Martin [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Guimarães Filho, Hélio Antonio [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
OBJECTIVE: To determine reference values for placental volume at 7 to 10 + 6 weeks of gestation by means of three-dimensional ultrasonography with the XI VOCAL (eXtended Imaging Virtual Organ Computer-aided Analysis) method. MATERIALS AND METHODS: A cross-sectional study was developed with 70 pregnant women at 7 to 10 + 6 weeks of gestation. The XI VOCAL method with ten sequential adjacent planes was utilized in the volume calculations. Means, medians, standard deviation, minimum and maximum values for placental volume were calculated. A scatter plot adjusted by the determination coefficient (R²) was constructed to correlate placental volume and gestational age. RESULTS: Mean placental volume ranged from 4.6 cm³ (2.6-8.6 cm³) to 28.9 cm³ (11.4-66.9 cm³). The placental volume (PV) has shown to be highly correlated with the gestational age (GA) and the best fit equation was [PV = exp(0.582 × GA + 0.063); R² = 0.82]. CONCLUSION: Reference values for placental volume in the first gestational trimester were determined with the XI VOCAL method.
Acesso aberto (Open Access)
Caracterização do comportamento biomecânico do pé pronado e neutro durante tarefas funcionais, em indivíduos assintomáticos, por meio da análise cinemática tridimensional
(Universidade Federal de São Paulo (UNIFESP), 2015-03-09) Ferreira, Cintia Lopes [UNIFESP]; Yi, Liu Chiao [UNIFESP]; Lucareli, Paulo Roberto Garcia; http://lattes.cnpq.br/9905380373300754; http://lattes.cnpq.br/6106154677645509; http://lattes.cnpq.br/3078580296713478; Universidade Federal de São Paulo (UNIFESP)
Introduction: The three-dimensional kinematic analysis has been allowed understand the multi-segmental biomechanical behavior of foot. However, little is known about their kinematic behavior in functional tasks even the gait. Objective: Analyze and compare the kinematic behavior between neutral and pronated feet during squat phase of Anterior and Lateral Step Down (ASD and LSD) tests, and during the stance phase of stair ascent and descent cycle. Methods: Forty-two feet were evaluated. According to the Foot Posture Index, Navicular Drop and Calcaneal Angle, and subdivided into neutral foot (18) and pronated foot (24). For kinematic analysis, nine movements of squat of each test (ASD and LSD) and three cycles of stair ascent and three cycles of stair descent were collected bilaterally for each participant using a three-dimensional capture system of motion, the Oxford Foot Model, and processed by Vicon Nexus® software. The range of motion (ROM) to the four tasks and the angle and temporal values during the stair ascent and descent were analyzed in the three planes of motion for the segments: hindfoot relative to the floor (HFTFL); hindfoot relative to the tibia (HFTBA); forefoot relative to the tibia (FFTBA); and forefoot relative to the hindfoot (FFHFA). For the statistical analysis the MANOVA test was used, adopting the alpha error of 5% (p <0.05). Results: Differences were found for the step down tests for the following segments: HFTFL and FFHFA with lower plantar flexion and dorsiflexion to the pronated foot, respectively, in both tests. For the ASD, the pronated foot, in the frontal plane, showed lower ROM of pronation to FFTBA and FFHFA, while the HFTFL presented ROM of eversion for the neutral foot, and the pronated foot an excursion near zero. During LSD was observed also high ROM of dorsiflexion for the FFTBA. For stair ascent no differences were found between the groups. For stair descent, the differences were concentrated in the sagittal plane, with lower ROM for the pronated foot during the first and second double support, and high ROM during simple support. Besides in the frontal plane was observed lower angular values to the forefoot and in the transversal plane high angular values for the FFHFA and FFTBA. Conclusion: The pronated and neutral feet differ in kinematic behavior during ASD, LSD and stair descent tasks. These kinematic differences found concentrated in the sagittal plane for the three analyzed tasks and in the forefoot segment for descend stairs.
Acesso aberto (Open Access)
Comparação de softwares de imagens na avaliação das vias aéreas faríngeas
(Universidade Federal de São Paulo, 2022-05-20) Muniz, Renata da Fonseca Lacerda e [UNIFESP]; Cappellette, Mario Júnior [UNIFESP]; Fujita, Reginaldo Raimundo [UNIFESP]; http://lattes.cnpq.br/1780341325141181; http://lattes.cnpq.br/3772804052798387; http://lattes.cnpq.br/6564535368787034
Objetivo: Este estudo objetiva avaliar a confiabilidade na medição volumétrica da região faríngea por meio da comparação dos resultados obtidos por dois softwares, Dolphin Imaging e Invivo Anatomage. Método: 74 imagens tomográficas multi slice, de 37 pacientes com idades entre 7.5 e 15.2 anos, média de idade de 10.6 anos. As imagens foram importadas para os softwares Dolphin Imaging e Invivo Anatomage, os quais foram previamente calibrados por meio de um phantom, para ajuste do coeficiente de atenuação. O espaço aéreo faríngeo foi mensurado e remensurado para comparações intraobservador e interobservador, determinando a confiabilidade e reprodutividade dos programas. Resultados: os resultados mostraram forte correlação entre as medidas obtidas pelos dois programas com o Coeficiente de Correlação de Pearson de 0.965 e o CCI de 0.962. Os testes t de Student para amostras pareadas para a comparação entre as medições iniciais e as repetições pelo mesmo observador e pelo segundo observador foram não significativos em ambos os softwares (p > 0.05), indicando que não existem diferenças estatisticamente significativas entre as médias da primeira medição e das repetições. Conclusão: O software Dolphin mostrou medidas maiores que a mesmas oferecidas pelo Invivo, por seu método semi-automático em que o operador percorre as imagens fatia a fatia nos cortes coronal, axial e sagital, o que o torna mais preciso ao se mensurar vias aéreas.
Acesso aberto (Open Access)
Correlação do volume da vesícula vitelínica obtida por meio da ultrassonografia tridimensional com a idade gestacional entre a 7ª e a 10ª semanas usando o método multiplanar
(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2009-12-01) Rolo, Liliam Cristine [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Bortoletti Filho, João [UNIFESP]; Nowak, Paulo Martin [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
OBJECTIVE: To evaluate the correlation between the yolk sac volume measured by three-dimensional ultrasonography with gestational age at 7-10 weeks. MATERIALS AND METHODS: A cross-sectional study involving 72 healthy pregnant women at 7th-10th gestational weeks. The multiplanar method with 1.0 mm intervals was utilized. Regression models were constructed to analyze the correlation between yolk sac volume and gestational age, adjusted by the determination coefficient (R²). Mean, median, standard deviation, maximum and minimum values for yolk sac volume were calculated for each gestational age. RESULTS: A poor correlation was observed between yolk sac volume (YSV) and gestational age (GA). The quadratic regression was the model that best expressed this correlation: YSV = 0.9757 - 0.2499 × GA + 0.0172 × GA² (R² = 0.234). Mean yolk sac volume ranged from 0.07 cm³ (0.02-0.11) to 0.20 cm³ (0.02-0.74) between the 7th and 10th weeks (mean, 0.11 cm³, ± 0.10 cm³). CONCLUSION: There was a poor correlation between yolk sac volume and gestational age.
Acesso aberto (Open Access)
Efetividade da expansão rápida da maxila assistida cirurgicamente utilizando técnica de osteotomias em dois e três segmentos: ensaio clinico randomizado
(Universidade Federal de São Paulo (UNIFESP), 2017-06-01) Prado, Gabriela Pereira Ribeiro [UNIFESP]; Pereira, Max Domingues [UNIFESP]; Furtado, Fabianne Magalhães Girardin Pimentel [UNIFESP]; http://lattes.cnpq.br/5809529650066993; http://lattes.cnpq.br/9679136417299816; http://lattes.cnpq.br/9612434112678451; Universidade Federal de São Paulo (UNIFESP)
Introduction: The treatment of choice for adult transversal maxillary deficiency (TMD) ≥ 5mm is surgically assisted rapid maxillary expansion (SARME). There is no consensus in the literature on the best operatory technique, type and location of the osteotomies. Objective: Comparing 2- and 3-segment SARME effectiveness concerning quality of life (QL), maxillary expansion symmetry, stability of changes in palate area and volume, changes in nose width and topology of the paranasal area. Methods: 32 adult patients with TMD ≥ 5mm were randomly assigned to groups 2S (n=16) and 3S (n=16). Physical and psychological assessments were carried out before SARME (PREVIOUS) and in one of the following points in time: expansion accomplishment (EA), and four, six and ten months after EA (4M, 6M and 10M, respectively). QL was assessed according to Oral Health Impact Profile (OHIP-49) and Brazilian Orthognatic Quality of Life Questionaire (B-OQLQ). Symmetry of maxillary expansion was determined by superposing PRE and FE tomographs; stability of palate volume changes was assessed on 3D digital images produced from scanning PRE, 4M and 10M plaster casts; changes in nose width was established by superimposing PRE and 6M digital images obtained from scanning of patients faces; and clinical complications. Results: Results: There was statistical differences in the domains of Deficiency and Social Inability of OHIP-49 between 2S and 3S techniques. None of the tools assessing QL showed any statistically significant difference in total scoring when comparing groups 2S and 3S. There was an asymmetry of the expansion between the two techniques, however no differences were detected between the groups. The 2S and 3S techniques showed a significant increase in the area and volume of the A b s t r a c t | 161 palate at 4M, and at 10M the area measurement was stable while the volume showed a significant increase. The mean increase in nose width was greater (p=0.17) in group 2S (2.73mm) as compared with group 3S (1.92mm). There were no differences between the techniques regarding total, anteroposterior (Z axis) and vertical (Y axis) displacements, excepting for changes along X-axis (transversal) which were greater for 3S technique (p=0.014). The clinical postoperative complications were low and did not differ statistically between groups. Conclusion: Both SARME techniques produced the same positive quality-of-life impact on groups 2S and 3S as assessed 6 months after intervention; in the parameters used, the maxillary expansion asymmetry is similar in the 2S and 3S techniques; stable increase in palate area and volume as assessed in 10-month followup; similar forward changes in the topology of paranasal areas and 2S technique produced a larger nose width as compared with 3S intervention; postoperative complications were similar in 2S and 3S techniques .
Acesso aberto (Open Access)
Estimativa de peso ao nascimento utilizando a ultrassonografia bidimensional e tridimensional
(Associação Médica Brasileira, 2010-01-01) Nardozza, Luciano Marcondes Machado [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Vieira, Márcio Fragoso [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
OBJECTIVE: Assess and compare accuracy of birth weight prediction using a combination of two-dimensional (abdominal circumference - AC and femur length - FL) and three-dimensional parameters (fetal arm -VolArm and thigh -VolTh volumes). METHODS: A cross sectional study was carried out involving 78 singleton, live, euploid fetuses without structural malformations born within 48 hours after ultrasonography. VolArm and VolTh were obtained by three-dimensional ultrasound using the multiplanar mode at 5 mm intervals. AC and FL were measured by two-dimensional ultrasound. Linear and polynomial regressions were calculated to determine the best formula to predict birth weight using VolArm, VolTh , CA and FL. ANOVA was used to compare errors in birth weight prediction using this formula and those obtained using the Shepard and Hadlock formulae. RESULTS: The best formula for prediction of birth weight was a simple linear regression (Weight = -1486.1 + 60.5AC + 140.57FL + 16.6VolArm + 4.8VolTh), R2= 0.932. The error (E), absolute error (AE), percent error (PE) and absolute percent error (APE) for this new formula were 0 g, 0.2%, 112.2 g and 3.7%. This new formula had smaller E, AE, PE and APE than the Shepard formula and smaller AE and APE than Hadlock´s formula. CONCLUSION: A formula using VolArm, VolTh, AC and FL was more accurate for prediction of birth weight than formulae using only two-dimensional parameters.
Embargo
Predição de peso ao nascimento pela medida do volume de membros fetais por meio da ultrassonografia tridimensional
(Universidade Federal de São Paulo (UNIFESP), 2009-03-25) Vieira, Márcio Fragoso [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
Objectives: to determine a formula for birth weight prediction with use of the fetal upper-arm and thigh volumetry obtained by three-dimensional ultrasonography (3DUS); to compare this formula with the Hadlock’s and Shepard’s; to assess the reliability of the method. Patients and methods: a cross seccional study was carried out involving 81 singleton pregnant women without fetal structural anomaly or aneuploidy, within 48 hours before delivery. After measured the BPD, HC, AC and F, the upper-arm (ArmVol) and thigh volume (ThVol) were assessed by 3DUS, slice by slice at 5 mm intervals. From linear and polinomial regression, we generate the best formula for predicting birth weight on the basis of ArmVol and ThVol. The errors of these formulas were compared with the Shepard’s and Hadlock’s formulas erros, with one-way ANOVA. To assess the reliability of ArmVol and ThVol, the intraclass correlation coefficients had been calculated. Level of significance of 5% was adopted. Results: The ArmVol formula is linear (Birthweight = 803,91 + 39,89 ArmVol) and the ThVol, polynomial of second degree (Birthweight = 32,37 ThVol - 0,06 ThVol²). Another formula was determined using the two parameters (Birthweight = 792,87 + 22,81 ArmVol + 7,54 ThVol). The error, absolute error, percentile error and absolute percentile error of the ArmVol formula was 0 g, 0.5%, 163,4 g and 5.4%; the ThVol, -0,99 g, 0.3%, 155,5 g and 5.2%; and the ArmVol and ThVol, 0 g, -0.4%, 138.4 g and 4.6%. When compared with the Hadlock’s and Shepard’s formulas, the ArmVol and ThVol showed lower errors, but only the absolute error and percentile absolute erros were significant lower than Shepard’s. The formula with the two parameters also showed lower errors, but only the error, percentile error and absolute percentile error had been significant, also in relation to the Shepard’s formula. The measure of the ArmVol and the ThVol are reliables with intraclass correlation coefficients of intraobserver 0,98 and 0,99; interobserver e 0.96 and 0.97, respectively. Conclusions: it was generated three formulas for predicting birth weight by ArmVol and ThVol; these formulas showed lower errors than Shepard’s and Hadlock’s formulas, despite only in relation to the first one, some types of errors had been significants; the measure of the ArmVol and the ThVol was well reproductible.
Acesso aberto (Open Access)
Predição de peso ao nascimento pela ultra-sonografia tridimensional usando o volume do braço fetal: resultados preliminares
(Federação Brasileira das Sociedades de Ginecologia e Obstetrícia, 2008-04-01) Vieira, Márcio Fragoso [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Guimarães Filho, Hélio Antonio [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
PURPOSE: to evaluate the accuracy of fetal upper arm volume, using three-dimensional ultrasound (3DUS), in the prediction of birth weight. METHODS: this prospective cross-sectional study involved 25 pregnancies without structural or chromosomal anomalies. Bidimensional parameters (biparietal diameter, abdominal circumference and femur length) and the 3DUS fetal upper arm volume were obtained in the last 48 hours before delivery. The multiplanar method, using multiple sequential planes with 5.0-mm intervals, was used to calculate fetal upper arm volume. Polynomial regressions were used to determine the best equation in the prediction of fetal weight. The accuracy of this new formula was compared with Shepard's and Hadlock's formulas. RESULTS: fetal upper arm volume was strongly correlated to birth weight (r=0.83; p<0.005). Linear regression was the best equation [birth weight=681.59 + 43.23 x fetal upper arm volume]. The fetal upper arm volume mean error (0 g), mean absolute error (196.6 g) and mean percent absolute error (6.5%) were lower than using Shepard's formula; however, the difference did not reach significance (p>0.05). Birth weight predicted by fetal upper arm volume had a mean error lower than Hadlock's formula, but this difference was not statistically significant (p>0.05). CONCLUSIONS: the accuracy of fetal upper arm volume obtained through 3DUS is similar to the accuracy of bidimensional ultrasound in the prediction of birth weight. These findings need to be confirmed by larger studies.
Acesso aberto (Open Access)
Reprodutibilidade interobservador dos índices vasculares do Doppler de amplitude tridimensional do embrião entre 7 e 10 semanas e 6 dias de gestação
(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2010-06-01) Bortoletti Filho, João [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Nowak, Paulo Martin [UNIFESP]; Guimarães Filho, Hélio Antonio [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
OBJECTIVE: To evaluate the interobserver reproducibility of vascular indices obtained with three-dimensional power Doppler (3D power Doppler) ultrasonography at the first trimester of gestation. MATERIALS AND METHODS: The present reproducibility study involved 32 healthy pregnant women with 7 to 10 weeks and 6 days of gestation. The VOCAL (Virtual Organ Computer-aided AnaLysis) method was utilized to calculate embryos volume, with a 12° rotational angle. Subsequently, the software automatically displayed three 3D power Doppler vascular indices: vascularization index (VI), flow index (FI) and vascularization and flow index (VFI). In order to calculate the interobserver variability, an investigator performed a second blind measurement of the 32 embryos, and another investigator performed a third blind measurement of the same volumes. The interclass correlation coefficient (ICC) and Bland-Altman plots were utilized for statistical analysis. RESULTS: A good interobserver reproducibility was observed in relation to the three vascular indices. The VI presented ICC = 0.9 and mean difference between measurements = -1.1. For the FI, the ICC was 0.9 and mean difference = -0.5. The VFI presented ICC = 0.9 and mean difference = -1.1. CONCLUSION: The vascular indices, particularly the FI, obtained with 3D power Doppler ultrasonography at the first trimester of gestation demonstrated a high reproducibility.
Acesso aberto (Open Access)
Uso da tecnologia tridimensional para visualização de imagens anatômicas do joelho humano
(Universidade Federal de São Paulo (UNIFESP), 2014) Astur, Diego da Costa [UNIFESP]; Cohen, Moises [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
Introdução: A possibilidade de vivenciar os registros impressos com as mesmas características que visualizamos no dia a dia fez com que técnicas de construção de imagens com efeito tridimensional fossem desenvolvidas ao longo dos anos. Poucos estudos referentes à aplicação dessas técnicas na área da saúde foram citados na literatura. Entre eles, nenhum utiliza a técnica para o estudo da anatomia musculoesquelética. Objetivo: Aplicar a técnica anaglífica de construção e visualização tridimensional das principais estruturas musculoesqueléticas dissecadas do joelho humano. Métodos: Foram dissecados 20 joelhos humanos de cadáver para identificação das principais estruturas desta articulação. O joelho foi dividido em cinco regiões para facilitar a compreensão anatômica. Com auxílio de máquina fotográfica fixada a uma barra deslizante, foram realizados dois registros fotográficos da mesma estrutura por ângulos diferentes com o intuito de simular a visão dos olhos direito e esquerdo humanos. Com auxílio de software, as imagens foram polarizadas e sobrepostas. É necessário utilizar óculos polarizados próprios para visualizar a estrutura anatômica com o efeito tridimensional. Resultados: Após dissecção e aplicação da técnica anaglífica, foi obtida uma coleção de imagens tridimensionais das principais estruturas do joelho. As imagens foram agrupadas em cinco grupos: ligamento cruzado anterior, ligamento cruzado posterior, mecanismo extensor, compartimento póstero-lateral e compartimento póstero-medial do joelho. Conclusão: As imagens anatômicas dissecadas das principais estruturas musculoesqueléticas e vasculares do joelho humano podem ser visualizadas com efeito tridimensional quando aplicada a elas a técnica anaglífica.
Acesso aberto (Open Access)
Volume do embrião estimado pela ultra-sonografia tridimensional entre a sétima e a décima semana de gestação
(Federação Brasileira das Sociedades de Ginecologia e Obstetrícia, 2008-10-01) Bortoletti Filho, João [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Rôlo, Líliam Cristine; Nowak, Paulo Martin [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
PURPOSE: to evaluate the embryo's volume (EV) between the seventh and the tenth gestational week, through tridimensional ultrasonography. METHODS: a transversal study with 63 normal pregnant women between the seventh and the tenth gestational week. The ultrasonographical exams have been performed with a volumetric abdominal transducer. Virtual Organ Computer-aided Analysis (VOCAL) has been used to calculate EV, with a rotation angle of 12º and a delimitation of 15 sequential slides. The average, median, standard deviation and maximum and minimum values have been calculated for the EV in all the gestational ages. A dispersion graphic has been drawn to assess the correlation between EV and the craniogluteal length (CGL), the adjustment being done by the determination coefficient (R²). To determine EV's reference intervals as a function of the CGL, the following formula was used: percentile=EV+K versus SD, with K=1.96. RESULTS: CGL has varied from 9.0 to 39.7 mm, with an average of 23.9 mm (±7.9 mm), while EV has varied from 0.1 to 7.6 cm³, with an average of 2.7 cm³ (±3.2 cm³). EV was highly correlated to CGL, the best adjustment being obtained with quadratic regression (EV=0.2-0.055 versus CGL+0.005 versus CGL²; R²=0.8). The average EV has varied from 0.1 (-0.3 to 0.5 cm³) to 6.7 cm³ (3.8 to 9.7 cm³) within the interval of 9 to 40 mm of CGL. EV has increased 67 times in this interval, while CGL, only 4.4 times. CONCLUSIONS: EV is a more sensitive parameter than CGL to evaluate embryo growth between the seventh and the tenth week of gestation.

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