Quantitative Ultrasound
Mostrando 1-12 de 60 artigos, teses e dissertações.
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1. Shear wave elastography in early diabetic kidney disease
SUMMARY OBJECTIVE: This study aimed to analyze the kidneys among the subjects with early stages of type 2 diabetic kidney disease by shear wave elastography quantitatively. METHODS: A total of 108 patients with type 2 diabetic kidney disease and 17 control subjects were enrolled. According to the estimated glomerular filtration rate and urinary albumin-to-
Revista da Associação Médica Brasileira. Publicado em: 2022
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2. Analysis of cardiovascular risk and carotid intima-media thickness in patients with psoriasis,
Abstract Background: Psoriasis is associated with atherosclerosis and increased cardiovascular risk. Currently, an automated ultrasound, called quantitative intima media thickness, has proven to be a useful method to evaluate subclinical atherosclerosis. Objectives: To compare increased cardiovascular risk in psoriasis patients receiving two types of treat
An. Bras. Dermatol.. Publicado em: 2020-03
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3. Ultrasound Versus Contrast-Enhanced Magnetic Resonance Imaging for Subclinical Synovitis and Tenosynovitis: A Diagnostic Performance Study
OBJECTIVES: Radiographic manifestations of synovitis (e.g., erosions) can be observed only in the late stage of rheumatoid arthritis. Ultrasound is a noninvasive, cheap, and widely available technique that enables the evaluation of inflammatory changes in the peripheral joint. In the same way, dynamic contrast-enhanced magnetic resonance imaging (MRI) enabl
Clinics. Publicado em: 20/01/2020
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4. Breast elastography: diagnostic performance of computer-aided diagnosis software and interobserver agreement
Resumo Objetivo: Determinar o melhor valor de corte para classificar os nódulos mamários pela elastografia por ultrassom, usando um software dedicado para elastografia por deformação, e determinar o nível de concordância interobservadores. Materiais e Métodos: Foram incluídos no estudo 83 pacientes com 83 massas mamárias identificadas no ultrassom
Radiol Bras. Publicado em: 10/01/2020
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5. B-mode ultrasonography and gray scale histogram for evaluation of the nuchal ligament in Quarter horse
RESUMO: O histograma em escala de cinza (HEC) possibilita a mensuração da quantidade e distribuição da frequência de tonalidades de cinza, fornecendo informações quantitativas, tanto sobre a ecogenicidade quanto a ecotextura dos tecidos. Havendo a necessidade de diminuir a subjetividade das imagens ultrassonográficas do ligamento nucal (LN), esse tra
Pesq. Vet. Bras.. Publicado em: 14/10/2019
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6. Could semiquantitative analysis of real-time ultrasound elastography distinguish more liver parenchyma alterations of nonalcoholic fatty liver disease in patients with polycystic ovary syndrome?
ABSTRACT Objective: Nonalcoholic fatty liver disease is the commonest diffuse liver disease, of which women with polycystic ovary syndrome are at an increased risk. The aim of the present study was to assess the diagnostic value of the semiquantitative strain parameters of real-time ultrasound elastography for nonalcoholic fatty liver disease in patients wi
Arch. Endocrinol. Metab.. Publicado em: 21/03/2019
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7. Anti-inflammatory and antinociceptive effects of phonophoresis in animal models: a randomized experimental study
The aim of this study was to evaluate the therapeutic effects of ultrasound (US)-mediated phonophoresis alone or in association with diclofenac diethylammonium (DCF) administered topically in animal models of inflammation. A pre-clinical, prospective, and randomized experimental study of quantitative and qualitative nature was carried out. Phonophoresis was
Braz J Med Biol Res. Publicado em: 24/01/2019
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8. Mejora en la calidad de imágenes ultrasónicas aplicando métodos de composición espacial y empleando sistemas de Phased Array
ABSTRACT The Phased Array Ultrasonic Technique (PAUT) has become a widely used imaging tool for the Nondestructive Testing in the industrial field. The PAUT allows making deflections and focusing the ultrasound beam at different depths within the material, through an electronic control of each one of the N elements that make up the array transducer. Thus, se
Matéria (Rio J.). Publicado em: 19/07/2018
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9. Mean scatterer space estimation from ultrasound signals combining singular spectral analysis and entropy
AbstractIntroduction: Ultrasound (US) is a nonionizing radiation capable of real time imaging at low cost. Its most attractive application is quantitative tissue characterization with the objective of differentiating normal tissues from diseased tissues. In this study, an automated method using singular spectrum analysis (SSA) to estimate the mean scatterer
Res. Biomed. Eng.. Publicado em: 2018-06
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10. Repeatability of the “flash-replenishment” method in contrast-enhanced ultrasound for the quantitative assessment of hepatic microvascular perfusion
This study aimed to evaluate the feasibility and repeatability of the flash-replenishment method in contrast-enhanced ultrasound (CEUS) perfusion imaging and assess quantitatively microvascular perfusion in the liver. Twenty healthy New Zealand rabbits were submitted to CEUS perfusion imaging with continuous intravenous infusion. Using flash-replenishment ki
Braz J Med Biol Res. Publicado em: 26/02/2018
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11. Comparison between the gold standard DXA with calcaneal quantitative ultrasound based-strategy (QUS) to detect osteoporosis in an HIV infected cohort
ABSTRACT Introduction: Osteoporosis represents one of the most frequent comorbidity among HIV patients. The current standard method for osteoporosis diagnosis is dual-energy X-ray absorptiometry. Calcaneal quantitative ultrasound can provide information about bone quality. The aims of this study are to compare these two methods and to evaluate their ability
Braz J Infect Dis. Publicado em: 2017-12
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12. Development and Validation of Ultrasound Assisted and Dispersive Liquid-Liquid Microextractions Combined with HPLC-UV Method for Determination of Bosentan in Human Plasma and Urine
A feasible, rapid, sensitive and reliable dispersive liquid-liquid microextraction (DLLME) and ultrasonic assisted liquid-liquid microextraction (USAEME) combined with high-performance liquid chromatography (HPLC) method with UV detection was developed and validated for analysis of bosentan in human plasma and urine samples. All validation tests were reporte
J. Braz. Chem. Soc.. Publicado em: 2017-05